CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   Main CFD Forum (http://www.cfd-online.com/Forums/main/)
-   -   k-epsilon model (http://www.cfd-online.com/Forums/main/2832-k-epsilon-model.html)

p.srinivasulu November 24, 2000 13:01

k-epsilon model
 
Hai,

I am working on "flow past a square cylinder" for incompressible flows using finite difference, explicit scheme. The method is based on "SOLA". For turbulent flows, I have incorporated reynolds average equations of motion, k-equation and dissipation equation in my code. I am facing some difficult when doing finite difference for turbulent viscosity and viscous terms. Because, turbulent viscosity is also variable. Which type of differencing is to be adopted central or forward differencing?. I shall be waiting for your kind reply.

bye.........

Jagadish Pothapu November 27, 2000 06:28

Re: k-epsilon model
 
srinivasalu,

try both method and see which works for you better

later,

V. G. Ferreira December 3, 2000 08:29

Re: k-epsilon model
 
Take care when you use central-diference and first order approximation. i) The artificial viscosity is the problem in the first order method. ii) oscilations are the problem in the central-difference. I prefer to use others high order approximation. By.


All times are GMT -4. The time now is 11:21.