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Combined immersed-boundary finite-difference methods for three-dimensional
complex flow simulations
[PDF]
da rub.de
EA Fadlun, R Verzicco, P Orlandi… - Journal of C omputational …, 2000 - Elsevier
A second-order accurate, highly efficient method is developed for simulating unsteady
three-dimensional incompressible flows in complex geometries. This is achieved by using boundary
body forces that allow the imposition of the boundary conditions on a given surface not ...
C itato da 466 - Articoli correlati - Tutte e 8 le versioni
A finite-difference scheme for three-dimensional incompressible flows in cylindrical
coordinates
…, P Orlandi - Journal of C omputational P hysics, 1996 - Elsevier
A finite-difference scheme for the direct simulation of the incompressible time-dependent
three-dimensional Navier-Stokes equations in cylindrical coordinates is presented. The equations
in primitive variables (v r ,v θ ,v z andp) are solved by a fractional-step method together ...
C itato da 209 - Articoli correlati - Tutte e 8 le versioni
[LIBRO]
Fluid flow phenomena: a numerical toolkit
P Orlandi - 2000 - books.google.com
FLUID MEC HANIC S AND ITS AP P LIC ATIONS Volume 55 Series Editor: R. MOREAU MADY LAM
Ecole Nationale Superieure d'Hydraulique de Grenoble Boite P ostale 95 38402 Saint Martin
d'He res C edex, France Aims and Scope of the Series The purpose of this series is to ...
C itato da 122 - Articoli correlati - Tutte e 2 le versioni
Direct numerical simulations of turbulent channel flow with transverse square bars [PDF] da uprm.edu
on one wall
S Leonardi, P Orlandi, RJ Smalley… - Journal of Fluid …, 2003 - C ambridge Univ P ress
Direct numerical simulations have been carried out for a fully developed turbulent channel flow
with a smooth upper wall and a lower wall consisting of square bars separated by a rectangular
cavity. A wide range of w/k, the cavity width to roughness height ratio, was considered. ...
C itato da 98 - Articoli correlati - Tutte e 7 le versioni
Vortex dipole rebound from a wall
P Orlandi - P hysics of Fluids A: Fluid Dynamics, 1990 - link.aip.org
Accurate numerical simulations of vortex dipoles impinging on flat boundaries have revealed
interesting new features. In the case of free‐slip boundaries the dipole does not rebound from
the wall. In the case of nonslip walls rebounding occurs and complex interactions of ...
C itato da 97 - Articoli correlati - Tutte e 4 le versioni
Direct simulations of turbulent flow in a pipe rotating about its axis
P Orlandi… - Journal of Fluid Mechanics, 1997 - C ambridge Univ P ress
P age 1. J. Fluid Mech. (1997), vol. 343, pp. 43–72. P rinted in the United Kingdom c 1997
C ambridge University P ress 43 Direct simulations of turbulent flow in a pipe ... Recently a direct
simulation of turbulent pipe flow by finite differences has been performed by Eggels et al. ...
C itato da 94 - Articoli correlati - Tutte e 4 le versioni
Large eddy simulation in complex geometric configurations using boundary body
forces
R Verzicco, J Mohd-Y usof, P Orlandi… - AIAA journal, 1900 - pdf.aiaa.org
A numerical method is presented that allows large eddy simulation (LES) of turbulent ows in
complex geometric con gurations with moving boundaries and that retains the advantages of
solving the Navier–Stokes equations on xed orthogonal grids. The boundary conditions ...
C itato da 62 - Articoli correlati - Tutte e 6 le versioni
On the generation of turbulent wall friction
P Orlandi… - P hysics of Fluids, 1994 - link.aip.org
The formation of streaky velocity structures in the near wall region of turbulent boundary layers
is studied through a simplified two‐dimensional computational model in the plane normal to
the average velocity. It is shown that the redistribution of the longitudinal velocity by ...
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C itato da 55 - Articoli correlati - Tutte e 3 le versioni
Vortex rings impinging on walls: axisymmetric and three-dimensional simulations
P Orlandi… - Journal of Fluid Mechanics, 1993 - C ambridge Univ P ress
(Received 13 November 1992 and in revised form 3 May 1993) ... Accurate numerical simulations
of vortex rings impinging on flat boundaries revealed the same features observed in
experiments. The results for the impact with a free-slip wall compared very well with ...
C itato da 55 - Articoli correlati - Tutte e 3 le versioni
A tentative approach to the direct simulation of drag reduction by polymers
P Orlandi - Journal of Non-Newtonian Fluid Mechanics, 1995 - Elsevier
An efficient technique for drag reduction uses dilute solutions of a few ppm of polymers. A possible
reduction in drag of up to 80% is achieved. Several experimental observations have been made
which tend to indicate that the polymers modify the turbulence structures within the buffer ...
C itato da 50 - Articoli correlati - Tutte e 6 le versioni
Numerical simulation of tripolar vortices in 2D flow
P Orlandi… - Fluid Dynamics Research, 1992 - Elsevier
The formation of a tripolar vortex in a two-dimensional flow is simulated numerically for two different
cases, viz. the tripole arising from a collision of two Lamb dipoles, and the emergence of a tripole
from an initially axisymmetric, unstable vortex. This latter situation was also considered in ...
C itato da 52 - Articoli correlati - Tutte e 8 le versioni
Laminar flow in a complex geometry: a comparison
…, P Orlandi - International Journal for Numerical …, 1985 - Wiley Online Library
... Flow inside a channel with a smooth expansion was chosen by the organizers of ... Two
methodologies are employed most commonly in computational fluid dynamics (C FD), namely
finite differences ... With regard to the specific task of computing flows in complex geometries, the ...
C itato da 44 - Articoli correlati - Tutte e 5 le versioni
Vorticity-velocity formulation for high Re flows
P Orlandi - C omputers & Fluids, 1987 - Elsevier
A very accurate ADI method has been applied to the Navier-Stokes equations written in
vorticity-velocity variables. C entered in space finite differences reduce the system of P DE's to
an algebraic system of block tridiagonal form. The equations are strongly coupled and ...
C itato da 39 - Articoli correlati - Tutte e 4 le versioni
A numerical study of three-dimensional vortex ring instabilities: viscous corrections
and early nonlinear stage
…, R Verzicco, P Orlandi - Journal of Fluid …, 1994 - C ambridge Univ P ress
J. Fluid Mech. (1994), val. 279, pp. 351-375 C opyright 0 1994 C ambridge University P ress ...
A numerical study of three-dimensional vortex ... By KARIM SHARIFF', ROBERTO VERZIC C 02
AND P AOLO ORLAND12 NASA-Ames Research C enter, Moffett Field, C A 94035, USA ' ...
C itato da 36 - Articoli correlati - Tutte e 3 le versioni
Helicity fluctuations and turbulent energy production in rotating and non-rotating
pipes
P Orlandi - P hysics of Fluids, 1997 - link.aip.org
In this paper finite-difference second-order accurate direct simulations have been used to investigate
how the helicity density fluctuations change when a turbulent pipe rotates about its axis. In this
case the rotation axis is parallel to the near wall vortical structures which play a ...
C itato da 30 - Articoli correlati - Tutte e 5 le versioni
Structure of turbulent channel flow with square bars on one wall
S Leonardi, P Orlandi, L Djenidi… - … of Heat and Fluid Flow, 2004 - Elsevier
The organised motion in a turbulent channel flow with a succession of square bars on the bottom
wall has been investigated using direct numerical simulations. Several values of the ratio
w/k, where k is the bar height and w is the longitudinal separation between consecutive ...
C itato da 32 - Articoli correlati - Tutte e 3 le versioni
Flow in an impeller‐stirred tank using an immersed‐boundary method
[PDF]
da stanford.edu
…, M Fatica, G Iaccarino, P Orlandi - AIC hE journal, 2004 - Wiley Online Library
Stirred tanks are encountered in a wide variety of industrial processes from chemical reactors
to biotechnologies; therefore, the understanding and prediction of the fluid dynamics of such
devices is of key importance for future developments. Experimental investigations are ...
C itato da 29 - Articoli correlati - Tutte e 9 le versioni
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The rollup of a vortex layer near a wall
…, P Orlandi - Journal of Fluid Mechanics, 1993 - C ambridge Univ P ress
J . FluidMech. (1993), vol. 248, pp. 297-313 C opyright 0 1993 C ambridge University P ress ...
The rollup of a vortex layer near a wall ... By JAVIER JIMENEZ1i3 AND P AOLO ORLAND12y3
'School of Aeronautics, U. P olitkcnica, P 1. C ardenal C isneros 3, 28040 Madrid, Spain ...
C itato da 26 - Articoli correlati - Tutte e 4 le versioni
Reynolds stress anisotropy of turbulent rough wall layers
…, S Leonardi, R Antonia, L Djenidi, P Orlandi - Experiments in …, 2002 - Springer
Abstract The current classification of turbulent boundary layers over different wall surfaces is
based on the effect the roughness has on the mean velocity, via the roughness function
DU+. P revious hot-wire measurements have shown that turbulent boundary layers over ...
C itato da 23 - Articoli correlati - Tutte e 4 le versioni
Scaling of longitudinal velocity increments in a fully developed turbulent channel
flow
RA Antonia, P Orlandi… - P hysics of Fluids, 1998 - link.aip.org
There is less information available on how varies within a particular flow, eg, how it is influenced
by the proximity to a wall, and, more generally, how it is affected by the anisotropy, which may
depend on the mean shear and Gaudin et al. mapped the spatial variation of in the wake ...
C itato da 18 - Articoli correlati - Tutte e 3 le versioni
Evolution of isolated vortices in a rotating fluid of finite depth
P Orlandi… - Journal of Fluid Mechanics, 1999 - C ambridge Univ P ress
... The code will display like this: Evolution of isolated vortices in a rotating fluid of finite depth. P.
ORLA NDI and GF C ARNEVALE (). Journal of Fluid Mechanics, Volume 381, pp 239-269
http://journals.cambridge.org/action/displayAbstract?aid=14751. Blog This Article Social ...
C itato da 21 - Articoli correlati - Tutte e 5 le versioni
Direct numerical simulation of turbulent channel flow with wall velocity
disturbances
P Orlandi, S Leonardi, R Tuzi… - P hysics of Fluids, 2003 - link.aip.org
This paper considers the effect of applying nonzero velocity fluctuations along a flat smooth
wall, mainly with the aim of understanding how conditions at the wall interact with the outer turbulent
flow. Such a study is expected to be of use in formulating effective strategies for wall ...
C itato da 18 - Articoli correlati - Tutte e 3 le versioni
DNS of turbulent channel flows with two-and three-dimensional
roughness
[CITAZIONE]
P Orlandi… - Journal of Turbulence, 2006 - Taylor & Francis
C itato da 20 - Articoli correlati - Tutte e 2 le versioni
Turbulent channel flow with either transverse or longitudinal roughness elements
on one wall
P Orlandi, S Leonardi… - Journal of Fluid …, 2006 - C ambridge Univ P ress
J. Fluid Mech. (2006), vol. 561, pp. 279–305. c 2006 C ambridge University P ress
doi:10.1017/S0022112006000723 P rinted in the United Kingdom ... Turbulent channel flow
with either transverse or ... AND RA ANTONIA2 1Dipartimento di Meccanica e ...
C itato da 18 - Articoli correlati - Tutte e 7 le versioni
First transitions in circular Couette flow with axial stratification
…, S Le Gentil, P Orlandi - P hysics of Fluids, 1997 - link.aip.org
The first flow regimes which have been observed experimentally for a circular C ouette flow with
a stable, axial stratification in density are investigated through direct numerical simulations of
the three-dimensional Navier-Stokes equations for a Boussinesq fluid. The setup of two ...
C itato da 14 - Articoli correlati - Tutte e 3 le versioni
Turbulent budgets in rotating pipes by DNS
P Orlandi… - International Journal of Heat and Fluid Flow, 2000 - Elsevier
When a fluid enters a pipe rotating about its axis, tangential shear forces, acting between the
wall and the fluid, cause the fluid to rotate with the pipe, resulting in a flow pattern different from
that observed in a stationary pipe. Rotation reduces the turbulence in the wall region and ...
C itato da 16 - Articoli correlati - Tutte e 5 le versioni
[CITAZIONE]
A finite difference scheme for direct simulation in cylindrical coordinates
…, P Orlandi - J. C omput. P hys, 1996
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C itato da 15 - Articoli correlati
Mixedness in the formation of a vortex ring
…, P Orlandi - P hysics of Fluids, 1995 - link.aip.org
The mixing process in the formation of an axisymmetric vortex ring is analyzed by direct numerical
simulation. After the initial phase, when the impulse is imparted to the fluid, the mixing increases
linearly in time with a slope that is directly proportional to the vortex circulation (Γ) and to ...
C itato da 14 - Articoli correlati - Tutte e 3 le versioni
Vortex dipoles impinging on circular cylinders
P Orlandi - P hysics of Fluids A: Fluid Dynamics, 1993 - link.aip.org
V ortex pairs interacting with a circular cylinder have been simulated by the numerical simulation
of the two‐dimensional Navier–Stokes equation in the vorticity streamfunction formulation. The
interaction with a cylinder with a diameter equal to the diameter of the dipole has been ...
C itato da 13 - Articoli correlati - Tutte e 5 le versioni
Inviscid dipole-vortex rebound from a wall or coast
[PDF]
da cicese.mx
[PDF]
da uprm.edu
…, OUV Fuentes, P Orlandi - Journal of Fluid …, 1997 - C ambridge Univ P ress
A vortex approaching a no-slip wall 'rebounds' due to the creation of vorticity at the wall in a viscous
boundary layer. Here it is demonstrated that a purely inviscid mechanism can also produce vortex
rebound from a slip wall. In inviscid vortex rebound, vortex tube stretching generates the ...
C itato da 12 - Articoli correlati - Tutte e 5 le versioni
Numerical and experimental study of the interaction between a vortex dipole and a
circular cylinder
…, JB Flor, GJF Heijst, P Orlandi - Experiments in Fluids, 1995 - Springer
Abstract This paper describes a study of the centred collision between a dipolar vortex and a
solid circular cylinder. The flow was analysed experimentally by using dye visualizations and
streak photography. Flow characteristics such as vorticity fields and the transport of ...
C itato da 12 - Articoli correlati - Tutte e 4 le versioni
An explanation for anomalous vortex merger in rotating‐tank experiments
GF C arnevale, P C avazza, P Orlandi… - P hysics of Fluids A: Fluid …, 1991 - link.aip.org
Theory and simulations based on the two‐dimensional Euler equation predict a critical distance
of separation for the merger of two like‐signed vortices. By the symmetry of the equation, this
separation must be the same for both cyclone and anticyclone pairs. In rotating‐tank ...
C itato da 11 - Articoli correlati - Tutte e 4 le versioni
[CITAZIONE]
Direct simulations of a turbulent pipe rotating along the axis
P Orlandi… - J. Fluid Mech, 1997
C itato da 10 - Articoli correlati
Drag reduction in turbulent MHD pipe flows
P Orlandi - Symposium on Turbulent Shear Flows, 11 th, Grenoble, …, 1997 - csa.com
P aolo Orlandi Symposium on Turbulent Shear Flows, 11 th, Grenoble, France, 14-22, 1997. ... is
a preliminary study devoted to verify whether the direct simulations of MHD flows reproduce the ...
field influenced the mean axial velocity, and complete laminarization of the flow at Ha ...
C itato da 9 - Articoli correlati - Tutte e 3 le versioni
Normal and oblique collisions of a vortex ring with a wall
…, P Orlandi - Meccanica, 1994 - Springer
... collision, experimentally observed by Lim [1], have been confirmed by the present numerical
simulation. ... impinging on a wall: axisymmetric and three-dimensional simu- lations', J. Fluid Mech
256 ... 8. Rai, MM, and Moin, E, 'Direct simulations of turbulent flow using finite-difference ...
C itato da 9 - Articoli correlati
A method for determining the frictional velocity in a turbulent channel flow with
roughness on the bottom wall
S Leonardi, P Orlandi… - Experiments in Fluids, 2005 - Springer
Abstract A method is proposed for determining the frictional velocity Us on both walls of a fully
developed turbulent channel flow, one smooth and the other rough. This should aid experimentalists
in obtaining a reliable estimate of Us with knowledge of only the pressure drop and ...
C itato da 9 - Articoli correlati - Tutte e 6 le versioni
Wall/vortex-ring interactions
…, P Orlandi - Applied Mechanics Reviews, 1996 - link.aip.org
This review article presents a state-of-the-art review of the ring and wall interactions in the case
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of normal and oblique collisions. The different approaches used to study this flow and the results
obtained are described and discussed. These techniques span from flow visualizations to ...
C itato da 7 - Articoli correlati
Direct numerical simulation of three-dimensional turbulent rough channels:
parameterization and flow physics
P Orlandi… - Journal of Fluid Mechanics, 2008 - C ambridge Univ P ress
Direct numerical simulations of the three-dimensional flow past rough surfaces with elements
of different shapes are performed to create a database. Our main interest is in finding a new parameterization
for turbulent rough flows, which, so far, has been based on the concept of equivalent sand ...
C itato da 7 - Articoli correlati - Tutte e 3 le versioni
A numerical method for direct simulation of turbulence in complex geometries
P Orlandi - In its Annual Research Briefs, 1989 p 215-229 ( …, 1990 - adsabs.harvard.edu
The ultimate goal of this work is to study the flow inside a channel with riblets on one of the two
walls. The method has been tested for two dimensional flows in the presence of bodies with a
geometrical singularity and for three dimensional flows inside domains described by ...
C itato da 6 - Articoli correlati - Tutte e 3 le versioni
Dynamics of a vortex ring in a rotating fluid
R Verzicco, P Orlandi, AHM Eisenga… - Journal of Fluid …, 1996 - C ambridge Univ P ress
(Received 12 September 1995 and in revised form 2 February 1996) ... The formation and the
evolution of axisymmetric vortex rings in a uniformly rotating fluid, with the rotation axis orthogonal
to the ring vorticity, have been investigated by numerical and laboratory experiments. The ...
C itato da 6 - Articoli correlati - Tutte e 4 le versioni
Properties of d-and k-type roughness in a turbulent channel flow
S Leonardi, P Orlandi… - P hysics of Fluids, 2007 - link.aip.org
Roughness is classified by the so-called roughness function, which represents the downward
shift of the velocity profile relative to a smooth wall. The dependence of the roughness function
on the Reynolds number is discussed with the aim of clarifying the difference between d- ...
C itato da 6 - Articoli correlati - Tutte e 6 le versioni
Passive scalar in a turbulent channel flow with wall velocity disturbances
[PDF]
da uprm.edu
[PDF]
da ulb.ac.be
P Orlandi… - Flow, Turbulence and C ombustion, 2004 - Springer
Received 30 May 2003; accepted in revised form 14 December 2003 Abstract. Direct Numerical
Simulations (DNS) of a passive scalar in a turbulent channel flow with a normal velocity disturbance
on the lower wall are presented for high and low Reynolds numbers. The aim is to ...
C itato da 5 - Articoli correlati - Tutte e 3 le versioni
Layer formation and transitions in stratified circular Couette flow
…, EB Gledzer, EJ Hopfinger, P Orlandi - … of Atmospheres and …, 1996 - Elsevier
The stability of circular C ouette flow with axial density stratification, characterized by the buoyancy
frequency N, is considered for various values of the non-dimensional gap width ε between the
cylinders. It is shown that onset of instability and the structure of the resulting flow ...
C itato da 5 - Articoli correlati - Tutte e 6 le versioni
[CITAZIONE]
A numerical method for turbulent flows over complex geometries
…, P Orlandi - Ercoftac Bull, 2004
C itato da 5 - Articoli correlati
[CITAZIONE]
Fluid flow phenomena: a numerical toolkit. 2000
P Orlandi - The Netherlands: Kluwer
C itato da 6 - Articoli correlati
Barotropic quasi-geostrophic f-plane flow over anisotropic topography
…, R P urini, P Orlandi, P C avazza - Journal of Fluid …, 1995 - C ambridge Univ P ress
J. Fluid Mech. (1995), vol. 285, pp. 329-347 C opyright @ 1995 C ambridge University P ress ...
Barotropic quasi-geostrophic f-plane flow over ... BY GF C ARNEVALE', R. P URINI~, P. ORLAND13
AND P. C AVAZZA3 ' Scripps Institution of Oceanography, University of C alifornia San ...
C itato da 4 - Articoli correlati - Tutte e 3 le versioni
Comparison between experiments and direct numerical simulations in a channel
flow with roughness on one wall
P Burattini, S Leonardi, P Orlandi… - Journal of Fluid …, 2008 - C ambridge Univ P ress
The turbulent flow in a two-dimensional channel with roughness on one wall is investigated using
experiments and direct numerical simulations (DNS). The elements have a square cross-section
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with height k =0.1H (H is the channel half-width) and a streamwise spacing of 4k. The ...
C itato da 6 - Articoli correlati - Tutte e 9 le versioni
Direct numerical and large-eddy simulations of turbulent flows over
rough surfaces
[CITAZIONE]
S Leonardi, R Antonia, P Orlandi… - AIAA Journal, 2006 - adsabs.harvard.edu
Title: Direct Numerical and Large-Eddy Simulations of Turbulent Flows over Rough Surfaces.
Authors: Leonardi, Stefano; Antonia, Robert; Orlandi, P aolo; Tessicini, Fabrizio. P ublication: AIAA
Journal, vol. 44, issue 11, pp. 2482-2487. P ublication Date: 11/2006. ...
C itato da 4 - Articoli correlati
``Combined immersed-boundary/finite-difference methods for threedimensional complex flow simulations''J. of Comp
[CITAZIONE]
EA Fadlun, R Verzicco, P Orlandi… - P hys, 2000
C itato da 4 - Articoli correlati
[CITAZIONE]
Stability of shielded vortex dipoles
P Orlandi, R Verzicco… - Modelling of Oceanic Vortices. North-Holland …, 1994
C itato da 4 - Articoli correlati
[CITAZIONE]
Flow in an impeller stirred tank using an immersed boundary technique
…, G Iaccarino, M Fatica, P Orlandi - C TR Annual Research briefs
C itato da 4 - Articoli correlati
Reynolds number dependence of the second-order turbulent pressure structure
function
RA Antonia, DK Bisset, P Orlandi… - P hysics of Fluids, 1999 - link.aip.org
The scaling of the second-order pressure structure function where and p is the kinematic pressure
fluctuation, was considered some time ago in the context of K41 using either dimensional arguments
or assuming joint-Gaussianity of the velocity fluctuations. Batchelor noted that the mean- ...
C itato da 3 - Articoli correlati - Tutte e 3 le versioni
Performance of a transverse vorticity probe in a turbulent channel flow
[PDF]
da 202.38.89.100
…, RA Antonia, Y Zhu, P Orlandi, P Esposito - Experiments in Fluids, 1998 - Springer
Abstract The performance of a four hot-wire transverse vorticity probe is tested by comparing
measurements in a fully developed turbulent channel flow with corresponding data obtained
from direct numerical simulations (DNS) of the same flow. In the inner region, the probe ...
C itato da 3 - Articoli correlati - Tutte e 7 le versioni
[CITAZIONE]
A numerical simulation of three-dimensional vortex rings instabilities
…, KR Shariff, P Orlandi - 1992 - printing
C itato da 3 - Articoli correlati
Direct simulation of Burgulence
P Orlandi… - … Sydney, Australia, August 28-31, 1983 …, 1984 - adsabs.harvard.edu
Burgers' equation has been solved by a finite difference scheme at very low viscosity. In order
to describe very accurately the very thin shock region a coordinate transformation has been
used. The small number of grid points in the space together with an implicit non-iterative ...
C itato da 3 - Articoli correlati
[CITAZIONE]
Drag reduction in turbulent MHD pipe flows, CTR
P Orlandi - P roceedings of the summer program, 1996
C itato da 3 - Articoli correlati
[CITAZIONE]
Boundary condition influence on the flow around a circular cylinder
…, R Verzicco, P Orlandi - … of IUTAN Symposium, Eckelmann, H., Graham, …, 1992
C itato da 3 - Articoli correlati
Two-dimensional and three-dimensional direct numerical simulation of co-rotating
vortices
P Orlandi - P hysics of Fluids, 2007 - link.aip.org
Two-dimensional (2D) and three-dimensional (3D) simulations are presented for co-rotating
vortices with distributed vorticity at different values of the separation distance . The ratio between
the vortices' radius and is smaller than the critical value for merging in inviscid conditions ...
C itato da 3 - Articoli correlati - Tutte e 4 le versioni
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[CITAZIONE]
http://scholar.google.it/scholar?hl=it&q=allintitle%...
The iron-rich beryls of Alpi Apuane. Mineralogy, chemistry and fluid
inclusion
…, M Giamello, P Orlandi… - NEUES …, 1993 - SC HWEIZERBART'SC HE …
C itato da 3 - Articoli correlati
Numerical solution of 3-D flows periodic in one direction and with complex
geometries in 2-D
[CITAZIONE]
P Orlandi - Annual Research Briefs, C enter for Turbulence …, 1989
C itato da 3 - Articoli correlati
[CITAZIONE]
Rebound of Vortex Dipole,"
P Orlandi - P hys. Fluids A, 1990
C itato da 3 - Articoli correlati
Two-dimensional laminar flow in elbows
P Orlandi… - ASME Transactions Journal of Fluids …, 1979 - adsabs.harvard.edu
A finite difference procedure is employed to evaluate the primary flow field in two typical
elbows. The first has an internal wall radius equal to the width; the internal radius of the second
sharper elbow is equal to one half of the width. Two-dimensional flow is assumed and a ...
C itato da 3 - Articoli correlati - Tutte e 2 le versioni
Direct simulation of polymer drag reduction in free shear flows and vortex dipoles
P Orlandi, GM Homsy… - … Using Numerical Simulation …, 1992 - adsabs.harvard.edu
One of the most efficient techniques for drag reduction is the injection of polymers near a wall
which can achieve a reduction in drag up to 80 percent. Several experimental observations tend
to indicate that polymers modify the turbulence structures within the buffer layer and show ...
C itato da 2 - Articoli correlati - Tutte e 2 le versioni
Vortex rings interacting with walls, analogies with wall turbulence structures
P Orlandi… - Near-wall turbulent flows, 1993 - csa.com
P Orlandi, R Verzicco Near-wall turbulent flows, 497-506, 1993. The dynamics of the collision of
a vortex ring with free-slip and no-slip walls is studied by a direct numerical simulation. ... (1992) for
the free-slip one. 34 FLUID MEC HANIC S AND HEAT TRANSFER(AH).
C itato da 2 - Articoli correlati
Structure functions in homogeneous and non-homogeneous turbulent flows
P Orlandi, RA Antonia… - … problematic issues in …, 1999 - books.google.com
322 P. Orlandi, RA Antonia, P G Esposito T a, C O H Figure 2: Integrand of Fp vs\ 6u\ for a) p=
3 and b) p—6. r= 40Ax r= 80Ax. r= 3Az (1603), we have evaluated ({6u) p} directly and compared
these results with those obtained from Eq.(1). Fig. Ib shows that the agreement is good for ...
C itato da 2 - Articoli correlati - Tutte e 2 le versioni
[CITAZIONE]
van & Carnevale, G. 1996 Dynamics of a vortex ring in a rotating fluid
R Verzicco, P Orlandi, A Eisenga… - J. Fluid Mech
C itato da 2 - Articoli correlati
DNS of turbulent flows in a channel with roughness
…, P Orlandi - Direct and Large-Eddy Simulation IV, 2002 - books.google.com
DNS OF TURBULENT FLOWS IN A C HANNEL WITH ROUGHNESS Stefano Leonardi, P aolo
Orlandi Universita di Roma" La Sapienza", Dip. of Meccanica e Aeronautica, via Eudossiana
n. 18, 00184, Roma, Italia. leonardi@ kolmogorov. ing. uniromal. it, orlandi@ kolmogorov. ...
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Vortex rings descending in a stratified fluid
P Orlandi, P Egermann… - P hysics of Fluids, 1998 - link.aip.org
Experimental and numerical results are presented of a laminar vortex ring descending in a linearly
stratified fluid. It is observed that the ring shrinks in size as it penetrates the stratified environment
and has nearly disappeared when it comes to a stop. This behavior is similar to what was ...
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[CITAZIONE]
Carnevale. GF 1999 Evolution of isolated vortices in a rotating fluid of finite
depth
P Orlandi - J. Fluid Mech
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[CITAZIONE]
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Anomalous vortex merger in laboratory experiments
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allintitle: flow OR fluid OR simulation OR flows OR ...
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GF C arnevale, P C avazza, P Orlandi… - An explanation for anomalous vortex …, 1991
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[CITAZIONE]
Unsteady Pressure Gradient Turbulent Boundary Layers
P Orlandi - … of the Symposium on Unsteady Turbulent Shear Flows …, 1981
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The study of vortex ring/wall interaction for artificial nose improvement
…, R Verzicco, P Orlandi - ESAIM: P roceedings, 1999 - edpsciences. org
ESAIM : P roceedings, Vol. 7, 1999, 258-269 Third International Workshop on V ortex Flows and
Related Numerical Methods http://www.emath.fr/proc/Vol.7/ ... The study of vortex ring/wall interaction
... M. Mammetti, R. Verzicco & P. Orlandi ... Universit`a di Roma “La Sapienza” ...
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[CITAZIONE]
Database of turbulent channel flow with moving walls
P Orlandi - 2007
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Rib vortices in round jets: Direct and large eddy simulation
…, R Verzicco, P Orlandi - … and Large Eddy Simulation …, 1994 - adsabs.harvard.edu
Direct and Large Eddy simulations of temporal evolving round jets at low Reynolds numbers
have been performed by a second-order finite difference scheme in cylindrical coordinates. The
simulations have shown the formation of longitudinal structures whose number increases ...
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[CITAZIONE]
Fluid flow phenomena: a numerical toolkit, vol 55
P Orlandi - 2000 - Kluwer Academic P ublishers, …
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Numerical simulation of vortices motion in presence of solid boundaries
P Orlandi - … on Numerical Methods in Fluid Mechanics, 8 th, Delft, …, 1990 - csa.com
P AOLO ORLA NDI GAMM-C onference on Numerical Methods in Fluid Mechanics, 8 th, Delft,
Netherlands ... A numerical simulation describing the behavior of large structures in the presence
of ... the time evolution of small perturbations starting from the plane P oiseuille flow at Re ...
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[CITAZIONE]
Jim eenez, J., 1994. On the generation of turbulent wall friction
P Orlandi - P hys. Fluids
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2000, Flow in an impeller stirred tank using an immersed boundary
technique, Annual Research Briefs 2000, Center For Turbulence Research, 251( …
[CITAZIONE]
…, G Laccarino, M Fatica, P Orlandi
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[CITAZIONE]
van 1992 Numerical simulations of tripolar vortices in 2D flow
P Orlandi… - Fluid Dyn. Res
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Numerical solution of 3-D flows periodic in one direction and with complex
geometries in 2-D. Annual Research Briefs
[CITAZIONE]
P Orlandi - C enter for Turbulence Research, 1989
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[CITAZIONE]
Effects of velocity ratio on vorticity dynamics and mixing in coaxial jet flow
MV Salvetti, P Orlandi… - … C onference on Turbulence and Shear Flows …, 1999
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Direct numerical simulations of decaying turbulent passive scalar
fluctuations: Schmidt number dependence
[CITAZIONE]
P Orlandi… - J. Fluid Mech.(submitted), 2001
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[CITAZIONE]
A Provisional Model for Unsteady Turbulent Boundary Layers
P Orlandi… - submitted to AIAA Journal
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[CITAZIONE]
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Direct simulations of a turbulent pipe rotating around its axis
P Orlandi… - Journal of Fluid Mechanics, 1997
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[CITAZIONE]
Numerical solutions for high Grashof numbers natural convection flow
fields'
…, P Orlandi - AIAA P aper 74, 1974
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[CITAZIONE]
The rollup of a vortex near a wall
…, P Orlandi - J. Fluid Mech, 1993
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[CITAZIONE]
Turbulent channel flow with rod and square bar roughness
S Leonardi, P Orlandi… - QNET-C FD Network Newsletter, 2003
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Free vortex rings, analogies and differences between vorticity and a passive scalar
P Orlandi… - V ortex flows and related numerical methods, 1993 - csa.com
... In the 3D case the simulation has shown completely different distributions between passive scalar
and vorticity field. ... This is a further proof that flow visualizations can be misleading when
conclusions on the vorticity field are withdrawn from ... (Author) 34 FLUID MEC HANIC S AND ...
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Unsteady adverse pressure gradient turbulent boundary layers
P Orlandi - … turbulent shear flows; P roceedings of the …, 1981 - adsabs.harvard.edu
Unsteady turbulent boundary layers with an adverse pressure gradient are calculated using
a one-equation model allowing for the viscous and buffer regions and including some dynamics
of the turbulence. In the analysis, a fully developed steady flat-plate turbulent boundary ...
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Statistics and Flow Structures in Couette–Poiseuille Flows
M Bernardini, P Orlandi, S P irozzoli… - P rogress in Wall …, 2010 - books.google.com
Statistics and Flow Structures in C ouette–P oiseuille Flows Matteo Bernardini, P aolo Orlandi,
Sergio P irozzoli1 and Fabrizio Fabiani Abstract Direct Numerical Simulations (DNS) of
C ouette–P oiseuille turbulent channel flows have been performed to understand whether ...
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Vortex structures in a rough-wall channel flow and their influence on
passive scalar
[CITAZIONE]
P Orlandi, S Leonardi… - IUTAM Symposium on …, 2006 - Springer Verlag
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Numerical solutions for atmospheric boundary layer flows over street canyons
…, P Orlandi - … C onference on Numerical Methods in Fluid Dynamics, 1975 - Springer
The local dispersion of the pollutants in the lower part of the urban atmosphe- re is strongly influenced
by the interaction between the atmospheric boundary layer, the geometrical building structure
and thermal sources distribution in the urban com plex. For example the distribution of ...
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Numerical solutions for high Grashof number, thermally induced flows in the lower
atmosphere
…, P ORLA NDI - … Institute of Aeronautics and Astronautics, Fluid and …, 1974 - csa.com
... induced flows in the lower atmosphere. R P IVA, P ORLA NDI American Institute of Aeronautics
and Astronautics, Fluid and P lasma Dynamics C onference, 7 th, P alo Alto, C alif, 1974. P roblems
concerning numerical solutions for high Grashof number natural convection flow fields ...
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The stability of vortex dipoles
…, GJ van Heijst, P Orlandi - … Fluid Mechanics C onference, 11 th, …, 1992 - csa.com
The stability of vortex dipoles. P aola C avazza, Gert J van Heijst, P aolo Orlandi
Australasian Fluid Mechanics C onference, 11 th, Univ. of Tasmania, Hobart, Australia,
67-70, 1992. Numerical simulations of vortex dipoles were ...
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Identification of zones in a free evolving vortex ring
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P Orlandi… - Applied Scientific Research, 1994 - Springer
... P hys. Fluids 30 (1987) 2343- 2353. 5. Verzicco, R. and Orlandi, P., A finite different scheme for
direct simulation in cylindrical coor- dinates. ... J. Fluid Mech. 248 (1993) 297-313. ... ll. C hong, MS,
P erry, A.Eo and C antwell, BJ, A general classification of three-dimensional flow fields. ...
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Saturation of inertial instability in rotating planar shear flows
[PDF]
da hawaii.edu
RC Kloosterziel, P Orlandi… - Journal of Fluid …, 2007 - C ambridge Univ P ress
Inertial instability in a rotating shear flow redistributes absolute linear momentum in such a way
as to neutralize the instability. In the absence of other instabilities, the final equilibrium can be
predicted by a simple construction based on conservation of total momentum. Numerical ...
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Guidelines for modeling a 2D rough wall channel flow
S Leonardi, P Orlandi, L Djenidi… - Flow, Turbulence and …, 2006 - Springer
... 82, 161–178 (1977) 17. Lumley, JL: C omputational modeling of turbulent flows. Adv. ... 194,
15–44 (1988) 19. Moser, RD, Kim, J., Mansour, NN: Direct numerical simulation of turbulent
channel flow up to Reτ = 590. ... 57 20. Orlandi, P.: Fluid Flow P henomena, A Numerical Toolkit. ...
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Mineral assemblages, stable isotopes and fluid inclusions in ore veins from the [PDF] da uniroma1.it
Macigno Formation at Calafuria (Livorno Mountains, northern Tuscany, Italy)
[PD F]
P ORLA NDI, G C ORTEC C I, G P ROTANO… - P er. …, 2006 - tetide.geo.uniroma1.it
ABSTRAC T. — The present paper deals with an integrated geological, mineralogical and geochemical
study on mineralized faults and fractures recognized in the Macigno Formation at C alafuria in
the Livorno Mountains of northern Tuscany. In the field, two main different systems of ...
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Numerical solutions of two dimensional flows in generalized curvilinear coordinates
P Orlandi… - Symposium on Applications of …, 1978 - adsabs.harvard.edu
The generalized curvilinear coordinates method has been used to solve the flow field generated
by the interaction between an atmospheric boundary layer and a natural convection flow. The
method here applied does not require an analytical coordinate transformation. The ...
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Nonuniform mesh effects on numerical solutions for recirculating flows
P Orlandi… - ASME Transactions Series E Journal of …, 1975 - adsabs.harvard.edu
A finite-difference scheme employing a nonuniform grid spacing is applied to the solution of the
Navier-Stokes equations for a typical recirculating flow defined as the motion generated by a
moving wall in a square cavity. The mesh increases resolution in certain areas, ...
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