Reynolds stress field in a turbulent wall jet induced by a streamwise vortex with periodic perturbation

2005 ◽  
Vol 40 (3) ◽  
pp. 372-382 ◽  
Author(s):  
S. Mochizuki ◽  
S. Yamada ◽  
H. Osaka
Keyword(s):  
Stress Field ◽  
Reynolds Stress ◽  
Streamwise Vortex ◽  
Periodic Perturbation ◽  
Wall Jet ◽  
Turbulent Wall

Reynolds Stress Field of a Stronger Wall Jet Managed by a Streamwise Vortex: Effect of Periodic Perturbation

2003 ◽  
Author(s):  
Shinsuke Mochizuki ◽  
Seiji Yamada ◽  
Hideo Osaka
Keyword(s):  
Stress Field ◽  
Reynolds Stress ◽  
Large Scale ◽  
Streamwise Vortex ◽  
Plane Wall ◽  
Periodic Perturbation ◽  
Spanwise Direction ◽  
Wall Jet ◽  
Streamwise Vorticity ◽  
Entrainment Process

Six Reynolds stress components were studied experimentally to understand evolution of streamwise vortex and a plane wall jet. It is seen that periodic perturbation are able to modify non-isotropic Reynolds stress field involved in the transport equation for streamwise vorticity. Modified Reynolds stress field accelerates development of vortex radius in spanwise direction. Interaction between streamwise vortex and spanwise eddies in the outer layer of the plane wall jet strengthen both velocity and length scales of large-scale eddies and increase streamwise momentum flux in enhancement of entrainment process.

Management of a Stronger Wall Jet by a Streamwise Vortex with Periodic Perturbation (Analysis by Phase Averaging)

2003 ◽  
Vol 2003.2 (0) ◽  
pp. 169-170
Author(s):  
Seiji YAMADA ◽  
Shinsuke MOCHIZUKI ◽  
Hirokazu MATSUURA ◽  
Hideo OSAKA
Keyword(s):  
Perturbation Analysis ◽  
Streamwise Vortex ◽  
Periodic Perturbation ◽  
Wall Jet ◽  
Phase Averaging

Calculation of Turbulent Wall Jets With an Algebraic Reynolds Stress Model

1980 ◽  
Vol 102 (3) ◽  
pp. 350-356 ◽  
Author(s):  
M. Ljuboja ◽  
W. Rodi
Keyword(s):  
Reynolds Stress ◽  
Reynolds Stress Model ◽  
Transport Equations ◽  
Turbulent Shear ◽  
Wall Jet ◽  
Wall Jets ◽  
Mean Velocity ◽  
Empirical Constant ◽  
Turbulent Wall Jets ◽  
Turbulent Wall

A modified version of the k-ε turbulence model is developed which predicts well the main features of turbulent wall jets. The model relates the turbulent shear stress to the mean velocity gradient, the turbulent kinetic energy k, and the dissipation rate ε by way of the Kolmogorov-Prandtl eddy viscosity relation and determines k and ε from transport equations. The empirical constant in the Kolmogorov-Prandtl relation is replaced by a function which is derived by reducing a model form of the Reynolds stress transport equations to algebraic expressions, retaining the wall damping correction to the pressure-strain model used in these equations. The modified k-ε model is applied to a wall jet in stagnant surroundings as well as to a wall jet in a moving stream, and the predictions are compared with experimental data. The agreement is good with respect to most features of these flows.

Management of a Stronger Wall Jet by a Streamwise Vortex : Effect of Periodic Perturbation

2003 ◽  
Vol 2003.41 (0) ◽  
pp. 137-138
Author(s):  
Hirokazu MATSUURA ◽  
Shinsuke MOCHIZUKI ◽  
Hideo OSAKA
Keyword(s):  
Streamwise Vortex ◽  
Periodic Perturbation ◽  
Wall Jet ◽  
Vortex Effect

519 Effect of Periodic Introduce of a Streamwise Vortex Pair in a Turbulent Wall Jet

2007 ◽  
Vol 2007.45 (0) ◽  
pp. 193-194
Author(s):  
Takeshi AIHARA ◽  
Takatsugu KAMEDA ◽  
Shinsuke MOCHIZUKI ◽  
Hideo OSAKA
Keyword(s):  
Vortex Pair ◽  
Streamwise Vortex ◽  
Wall Jet ◽  
Turbulent Wall
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