CFD Online Discussion Forums

CFD Online Discussion Forums (
-   Siemens (
-   -   Converegence problem (

Ahmad Al-Zoubi September 16, 2005 05:39

Converegence problem
Hallo All,

I have problem to get convergence in thr presence of momentum source term. Any Hints are willcome.

Ahmad Al-Zoubi

4xF September 16, 2005 07:16

Re: Converegence problem
1) Underrelax more

2) If the source term depends on the variable itself and the coefficient is negative, then put the coefficient into the implicit part of the source term (e.g. into S2U, S2V or S2W depending on the variable)

Ahmad Al-Zoubi September 16, 2005 10:06

Re: Converegence problem
Thanks alot,

I have tried this. It seems that it convereges BUT very very slowly... I think it is a simple problem which don't require such huge number of iterations.

by the way, my source term is a constant velocity (-2m/s).

Any other hints?.

Ahmad Al-Zoubi

4xF September 28, 2005 10:59

Re: Converegence problem
Have you also checked the units of the source term? It should be in N/m^3

All times are GMT -4. The time now is 08:15.