Numerical simulation of aerosound from an airfoil using k-epsilon turbulence model

1996 ◽  
Author(s):  
William Meecham ◽  
Wei-Jen Huang
Keyword(s):  
Numerical Simulation ◽  
Turbulence Model

Modeling of mass transfer in biofilms in oscillatory flow conditions using k-ɛ turbulence model

2003 ◽  
Vol 3 (1-2) ◽  
pp. 201-207
Author(s):  
H. Nagaoka ◽  
T. Nakano ◽  
D. Akimoto
Keyword(s):  
Numerical Simulation ◽  
Mass Transfer ◽  
Turbulence Model ◽  
Uptake Rate ◽  
Oscillatory Flow ◽  
Substrate Uptake ◽  
Flow Conditions ◽  
Mass Transfer Mechanism ◽  
Substrate Uptake Rate ◽  
Good Agreement

The objective of this research is to investigate mass transfer mechanism in biofilms under oscillatory flow conditions. Numerical simulation of turbulence near a biofilm was conducted using the low Reynold’s number k-ɛ turbulence model. Substrate transfer in biofilms under oscillatory flow conditions was assumed to be carried out by turbulent diffusion caused by fluid movement and substrate concentration profile in biofilm was calculated. An experiment was carried out to measure velocity profile near a biofilm under oscillatory flow conditions and the influence of the turbulence on substrate uptake rate by the biofilm was also measured. Measured turbulence was in good agreement with the calculated one and the influence of the turbulence on the substrate uptake rate was well explained by the simulation.

Numerical simulation of a viscoelastic RANS turbulence model in a diffuser

2018 ◽  
Vol 30 (4) ◽  
pp. 249-260 ◽  
Author(s):  
Saber Azad ◽  
Hamed Amiri Moghadam ◽  
Alireza Riasi ◽  
Hossien Mahmoodi Darian
Keyword(s):  
Numerical Simulation ◽  
Turbulence Model

Numerical Simulation of Flow in a Horizontal Sedimentation Tank

2011 ◽  
Vol 130-134 ◽  
pp. 3624-3627
Author(s):  
W.L. Wei ◽  
Zhang Pei ◽  
Y.L. Liu
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Secondary Flow ◽  
Mixture Model ◽  
Turbulence Model ◽  
Two Phase ◽  
Sedimentation Tank ◽  
Phase Mixture ◽  
Good Agreement

In this paper, we use two-phase mixture model and the Realizable k-ε turbulence model to numerically simulate the advection secondary flow in a sedimentation tank. The PISO algorithm is used to decouple velocity and pressure. The comparisons between the measured and computed data are in good agreement, which indicates that the model can fully simulate the flow field in a sedimentation tank.

Numerical Simulation of Unsteady Flow in a Submersible Axial Flow Pump

2013 ◽  
Vol 444-445 ◽  
pp. 486-489
Author(s):  
Xiao Xu Zhang ◽  
Hong Ming Zhang ◽  
Xiao Ping Li
Keyword(s):  
Numerical Simulation ◽  
Unsteady Flow ◽  
Turbulence Model ◽  
Axial Flow ◽  
Simple Algorithm ◽  
Flow Rule ◽  
Cfd Analysis ◽  
Flow Passage ◽  
Axial Flow Pump ◽  
Flow Pump

To make the submersible axial flow pump have better performance, it is very significant to know about the flowing distributions. Based on N-S equations and Standard turbulence model and SIMPLE algorithm, a CFD analysis was made of the full flow passage in this type of pump. The study result shows the flow rule and will provide a guide for the designing and the producing practice.

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