Three-Dimensional Simulation of Taylor-Couette Flow

1989 ◽  
pp. 366-370 ◽  
Author(s):  
N. Matsumoto ◽  
S. Shirayama ◽  
K. Kuwahara ◽  
F. Hussain
Keyword(s):  
Couette Flow ◽  
Three Dimensional ◽  
Taylor Couette ◽  
Dimensional Simulation ◽  
Taylor Couette Flow

Three-dimensional velocity field for wavy Taylor–Couette flow

2003 ◽  
Vol 15 (4) ◽  
pp. 947-960 ◽  
Author(s):  
Alp Akonur ◽  
Richard M. Lueptow
Keyword(s):  
Velocity Field ◽  
Couette Flow ◽  
Three Dimensional ◽  
Taylor Couette ◽  
Taylor Couette Flow

Torque reduction in Taylor–Couette flows subject to an axial pressure gradient

2009 ◽  
Vol 639 ◽  
pp. 373-401 ◽  
Author(s):  
MARCELLO MANNA ◽  
ANDREA VACCA
Keyword(s):  
Pressure Gradient ◽  
Couette Flow ◽  
Large Scale ◽  
Three Dimensional ◽  
Navier Stokes ◽  
Axial Pressure ◽  
Flow Solver ◽  
Axial Pressure Gradient ◽  
Taylor Couette ◽  
Taylor Couette Flow

The paper investigates the phenomena occurring in a Taylor–Couette flow system subject to a steady axial pressure gradient in a small envelope of the Taylor–Reynolds state space under transitional regimes. A remarkable net power reduction necessary to simultaneously drive the two flows compared to that required to drive the Taylor–Couette flow alone is documented under non-trivial conditions. The energy transfer process characterizing the large-scale coherent structures is investigated by processing a set of statistically independent realizations obtained from direct numerical simulation. The analysis is conducted with an incompressible three-dimensional Navier–Stokes flow solver employing a spectral representation of the unknowns.

Direct numerical simulation of turbulent Taylor–Couette flow

2007 ◽  
Vol 587 ◽  
pp. 373-393 ◽  
Author(s):  
S. DONG
Keyword(s):  
Couette Flow ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Reynolds Numbers ◽  
Taylor Vortex ◽  
Görtler Vortices ◽  
Tilting Angle ◽  
Taylor Couette ◽  
Gortler Vortices ◽  
Taylor Couette Flow

We investigate the dynamical and statistical features of turbulent Taylor–Couette flow (for a radius ratio 0.5) through three-dimensional direct numerical simulations (DNS) at Reynolds numbers ranging from 1000 to 8000. We show that in three-dimensional space the Görtler vortices are randomly distributed in banded regions on the wall, concentrating at the outflow boundaries of Taylor vortex cells, which spread over the entirecylinder surface with increasing Reynolds number. Görtler vortices cause streaky structures that form herringbone-like patterns near the wall. For the Reynolds numbers studied here, the average axial spacing of the streaks is approximately 100 viscous wall units, and the average tilting angle ranges from 16° to 20°. Simulationresults have been compared to the experimental data in the literature, and the flow dynamics and statistics are discussed in detail.

Three-Dimensional CFD Simulation of Stratified Two-Fluid Taylor-Couette Flow

2008 ◽  
Vol 84 (3) ◽  
pp. 279-288 ◽  
Author(s):  
Sreepriya Vedantam ◽  
Jyeshtharaj B. Joshi ◽  
Sudhir B. Koganti
Keyword(s):  
Couette Flow ◽  
Cfd Simulation ◽  
Three Dimensional ◽  
Taylor Couette ◽  
Two Fluid ◽  
Taylor Couette Flow

scholarly journals Physical mechanisms governing drag reduction in turbulent Taylor–Couette flow with finite-size deformable bubbles

2018 ◽  
Vol 849 ◽  
Author(s):  
Vamsi Spandan ◽  
Roberto Verzicco ◽  
Detlef Lohse
Keyword(s):  
Drag Reduction ◽  
Numerical Simulations ◽  
Couette Flow ◽  
Outer Cylinder ◽  
Three Dimensional ◽  
Finite Size ◽  
Carrier Fluid ◽  
Long Time ◽  
Taylor Couette ◽  
Taylor Couette Flow

The phenomenon of drag reduction induced by injection of bubbles into a turbulent carrier fluid has been known for a long time; the governing control parameters and underlying physics is, however, not well understood. In this paper, we use three-dimensional numerical simulations to uncover the effect of deformability of bubbles injected in a turbulent Taylor–Couette flow on the overall drag experienced by the system. We consider two different Reynolds numbers for the carrier flow, i.e. $Re_{i}=5\times 10^{3}$ and $Re_{i}=2\times 10^{4}$; the deformability of the bubbles is controlled through the Weber number, which is varied in the range $We=0.01{-}2.0$. Our numerical simulations show that increasing the deformability of bubbles (that is, $We$) leads to an increase in drag reduction. We look at the different physical effects contributing to drag reduction and analyse their individual contributions with increasing bubble deformability. Profiles of local angular velocity flux show that, in the presence of bubbles, turbulence is enhanced near the inner cylinder while attenuated in the bulk and near the outer cylinder. We connect the increase in drag reduction to the decrease in dissipation in the wake of highly deformed bubbles near the inner cylinder.

Hydromagnetic Taylor–Couette flow: numerical formulation and comparison with experiment

2002 ◽  
Vol 463 ◽  
pp. 361-375 ◽  
Author(s):  
A. P. WILLIS ◽  
C. F. BARENGHI
Keyword(s):  
Magnetic Field ◽  
Couette Flow ◽  
Liquid Metals ◽  
Three Dimensional ◽  
Finite Amplitude ◽  
Hydrodynamic Calculations ◽  
Numerical Formulation ◽  
Taylor Couette ◽  
Prandtl Numbers ◽  
Taylor Couette Flow

Taylor–Couette flow in the presence of a magnetic field is a problem belonging to classical hydromagnetics and deserves to be more widely studied than it has been to date. In the nonlinear regime the literature is scarce. We develop a formulation suitable for solution of the full three-dimensional nonlinear hydromagnetic equations in cylindrical geometry, which is motived by the formulation for the magnetic field. It is suitable for study at finite Prandtl numbers and in the small Prandtl number limit, relevant to laboratory liquid metals. The method is used to determine the onset of axisymmetric Taylor vortices, and finite-amplitude solutions. Our results compare well with existing linear and nonlinear hydrodynamic calculations and with hydromagnetic experiments.

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