Numerical Simulation of Turbulent Flow and Wall Mass Transfer in a Rectangular Channel Roughened by V-Shaped Grooves

The paper presents the re-entrant jet analysis of cavitating turbulent flow on a hydrofoil. Analysis was performed by OpenFOAM code. A mixture assumption and a finite rate mass transfer model were introduced. The finite volume method is used to solve the governing equations of the mixture model and the pressure-velocity coupling is handled via a Pressure Implicit with Splitting of Operators (PISO) procedure. The result of numerical simulation clearly explained the mechanism of re-entrant jet and quasi-periodic law of cavitating flow on a hydrofoil.

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Direct Numerical Simulation of Mass Transfer in Turbulent Flow Around a Rotating Circular Cylinder (II) - Effect of Schmidt Number -

Transactions of the Korean Society of Mechanical Engineers B ◽

10.3795/ksme-b.2005.29.7.846 ◽

2005 ◽

Vol 29 (7) ◽

pp. 846-853

Author(s):

Jong-Yeon Hwang ◽

Kyung-Soo Yang

Keyword(s):

Numerical Simulation ◽

Mass Transfer ◽

Circular Cylinder ◽

Direct Numerical Simulation ◽

Turbulent Flow ◽

Schmidt Number ◽

Rotating Circular Cylinder

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NUMERICAL SIMULATION OF TURBULENT FLOW IN A RECTANGULAR CHANNEL WITH PERIODICALLY MOUNTED LONGITUDINAL VORTEX GENERATORS

Frontiers in Heat and Mass Transfer ◽

10.5098/hmt.v2.3.3008 ◽

2011 ◽

Vol 2 (3) ◽

Cited By ~ 1

Author(s):

PANKAJ SAHA ◽

GAUTAM BISWAS

Keyword(s):

Numerical Simulation ◽

Turbulent Flow ◽

Rectangular Channel ◽

Vortex Generators ◽

Longitudinal Vortex

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Direct Numerical Simulation of Turbulent Flow and Mass Transfer Around a Rotating Circular Cylinder

Volume 2: Fora ◽

10.1115/fedsm2005-77401 ◽

2005 ◽

Author(s):

Jong-Yeon Hwang ◽

Kyung-Soo Yang ◽

Klaus Bremhorst

Keyword(s):

Numerical Simulation ◽

Mass Transfer ◽

Reynolds Number ◽

Circular Cylinder ◽

Direct Numerical Simulation ◽

Turbulent Flow ◽

Friction Velocity ◽

Concentration Field ◽

Rotating Circular Cylinder ◽

Instantaneous Concentration

Characteristics of turbulent flow and mass transfer around a rotating circular cylinder are investigated by Direct Numerical Simulation. Mass-transfer results are presented at a high Schmidt number (Sc = 1670). The concentration field is computed for three different cases of low Reynolds number, Re*R = 161, 348 and 623, based on the cylinder radius and friction velocity. Results confirm that the thickness of Nernst diffusion layer is very small compared with that of viscous sub-layer in the case of high Sc mass transfer. A strong correlation of the concentration field with streamwise and vertical velocity components is noticed. However, that is not the case with the spanwise velocity component. Visualization of instantaneous concentration reveals that the length scale of concentration fluctuation typically decreases as Reynolds number increases. The correlation between Sherwood number and Reynolds number is consistent with other experiments currently available.

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Numerical simulation of flow dynamics and heat transfer in a rectangular channel with periodic ribs on one of the walls

Journal of Physics Conference Series ◽

10.1088/1742-6596/2119/1/012028 ◽

2021 ◽

Vol 2119 (1) ◽

pp. 012028

Author(s):

A V Barsukov ◽

V V Terekhov ◽

V I Terekhov

Keyword(s):

Heat Transfer ◽

Numerical Simulation ◽

Reynolds Number ◽

Turbulent Flow ◽

Turbulence Model ◽

Rectangular Channel ◽

Flow Dynamics ◽

Flat Channel ◽

Optimal Model

Abstract The result of numerical simulation of a turbulent flow in a flat channel with a periodic transverse rib by the RANS and LES methods is presented. The Reynolds number, calculated from the rib height and the superficial velocity, is Re = 12600. The data obtained as a result of the study demonstrate the influence of the modeling method and the turbulence model on the quality of heat transfer prediction. The optimal model for this type of problems is presented.

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