3D Numerical Simulation of Hydraulics in an Oxidation Ditch

2012 ◽  
Vol 468-471 ◽  
pp. 190-193
Author(s):  
B. Lv ◽  
W.L. Wei ◽  
Y.L. Liu
Keyword(s):  
Numerical Simulation ◽  
Numerical Method ◽  
Turbulence Model ◽  
Simulation Study ◽  
Simple Type ◽  
Oxidation Ditch ◽  
Correction Algorithm ◽  
3D Numerical Simulation ◽  
Numerical Convergence ◽  
Wall Functions

A numerical simulation study of the hydrodynamics of an oxidation ditch is presented. The numerical method is based on a pressure-correction algorithm of the SIMPLE-type. A multigrid technique based on the full approximation storage (FAS) scheme is employed to accelerate the numerical convergence, while as a turbulence model the RNG κ-ε model with wall functions is used. The numerical results for velocity in the oxidation ditch are obtained．

Numerical Simulation of Hydraulic Characteristic of Oxidation Ditch

2011 ◽  
Vol 393-395 ◽  
pp. 1300-1303
Author(s):  
W.L. Wei ◽  
B. Lv ◽  
Y.L. Liu
Keyword(s):  
Numerical Simulation ◽  
Pressure Distribution ◽  
Numerical Method ◽  
Turbulence Model ◽  
Simulation Study ◽  
Simple Type ◽  
Oxidation Ditch ◽  
Correction Algorithm ◽  
Numerical Convergence ◽  
Wall Functions

A numerical simulation study of the hydrodynamics of oxidation ditch is presented. The numerical method is based on a pressure-correction algorithm of the SIMPLE-type. A multigrid technique based on the full approximation storage (FAS) scheme is employed to accelerate the numerical convergence, while as a turbulence model the RNG κ-ε model with wall functions is used. The numerical results for velocity, as well as for the pressure distribution in the oxidation ditch are obtained．

Numerical Study of the Flow over a Two-Dimensional Car Model

2011 ◽  
Vol 374-377 ◽  
pp. 677-680
Author(s):  
Wen Li Wei ◽  
Pei Zhang ◽  
Ming Qin Liu
Keyword(s):  
Pressure Distribution ◽  
Numerical Method ◽  
Turbulence Model ◽  
Numerical Study ◽  
Two Dimensional ◽  
Correction Algorithm ◽  
Numerical Convergence ◽  
Wall Functions ◽  
Pressure Correction ◽  
Car Model

A numerical study of the flow over a two-dimensional car model in proximity to the ground is presented. The numerical method is based on a pressure-correction algorithm of the SIMPLE-type．A multigrid technique based on the full approximation storage (FAS) scheme is employed to accelerate the numerical convergence, while as a turbulence model the standard κ-ε model with wall functions is used. The numerical results for the u and v velocity ,as well as for the pressure distribution over the car surface are obtained．

Simulation of 3D Gas-Liquid Two-Phase Flow Characteristics of Carrousel Oxidation Ditch

2012 ◽  
Vol 482-484 ◽  
pp. 1265-1268
Author(s):  
Y. L Liu ◽  
B Lv ◽  
W.L Wei
Keyword(s):  
Flow Characteristics ◽  
Simple Type ◽  
Oxidation Ditch ◽  
Correction Algorithm ◽  
Two Phase ◽  
Numerical Convergence ◽  
Wall Functions ◽  
Proposed Model ◽  
Phase Mixture ◽  
Carrousel Oxidation Ditch

In this paper, the gas–liquid two-phase mixture model with the k-ε turbulence model was used to numerically simulate the characteristics of an oxidation ditch. The proposed model concerns with the drag force and the drift velocity. The numerical method is based on a pressure-correction algorithm of the SIMPLE-type. A multigrid technique based on the full approximation storage (FAS) scheme is employed to accelerate the numerical convergence, while the κ-ε model with wall functions is used. The numerical results for velocity and turbulent kinetic energy in the oxidation ditch are obtained．

scholarly journals Probing Reynolds stress models of convection with numerical simulations: I. Overall properties: fluxes, mean profiles

2006 ◽  
Vol 2 (S239) ◽  
pp. 80-82 ◽  
Author(s):  
F. Kupka ◽  
H. J. Muthsam
Keyword(s):  
Numerical Simulation ◽  
Temperature Gradient ◽  
Numerical Simulations ◽  
Reynolds Stress ◽  
Simulation Study ◽  
3D Numerical Simulation ◽  
Stellar Convection ◽  
Mean Temperature ◽  
Stress Models

AbstractWe introduce an extended 3D numerical simulation study of Reynolds stress models of stellar convection and probe fluxes as well as mean temperature gradient profiles.

3D Numerical Simulation of Flow Field in a Circular Secondary Clarifier

2011 ◽  
Vol 393-395 ◽  
pp. 1080-1083
Author(s):  
Wen Li Wei ◽  
Pei Zhang ◽  
Yu Ling Liu
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Mixture Model ◽  
Turbulence Model ◽  
3D Numerical Simulation ◽  
Two Phase ◽  
Turbulence Flow ◽  
Secondary Clarifier ◽  
Phase Mixture

In this paper, we use two-phase mixture model and the 3D Realizable k-ε turbulence model to numerically simulate the advection secondary turbulence flow in a circular secondary clarifier. The PISO algorithm is used to decouple velocity and pressure. The results show that the model can provide a reference in designing sedimentation tanks.

Numerical Simulation of Wind Environment in a Hill and Buildings Configuration

2014 ◽  
Vol 641-642 ◽  
pp. 544-549
Author(s):  
Cheng Jun Shen ◽  
Cui Lan Gao ◽  
Ya Min Song
Keyword(s):  
Numerical Simulation ◽  
Urban Areas ◽  
Street Canyon ◽  
Simple Type ◽  
Correction Algorithm ◽  
Street Canyons ◽  
Wind Environment ◽  
Ambient Wind ◽  
Roof Level ◽  
Volume Method

Numerical simulation of air flow over urban areas is an effective way to analyze and predict the wind environment. This paper presents two dimensional computer model results concerning the effects of buildings and/or a hill on the wind flow. The RANS equations and RNG κ-ε turbulence model used in the simulation are discretized by the finite volume method. The computational solution is based on a pressure correction algorithm of the SIMPLE-type. The inflow boundary conditions are given by wind tunnel experiment. In the presence of only a street canyon formed by two buildings, the ambient wind is accelerated and slightly curved at the roof level. When there exist a hill and a street canyon, the velocity in the canyon is affected by the upwind hill. Another simulation model, which has a hill and two street canyons, is used for comparison. There is a little difference in velocity between a single street canyon and two canyons in the presence of an upwind hill.

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