|July 21, 2010, 05:04||
Comparison of simulations
Join Date: Mar 2010
Location: South Korea
Posts: 249Rep Power: 9
I am doing 5 simulations. what i will do is to just change the velocity for every simulation and compare the outcome of the results. But what happens is that if i change the velcoity it takes more iterations to converge and also i have to reduce the convergence criteria.
Do i need to have same iterations, same residual criteria and same under relaxation factors for comparison of my simulations or Is it posisble to give a small change to these parameters as long as the surface integrals and some other convergence criterias are fulfilled?
Thank you for your time.
|July 21, 2010, 09:16||
Join Date: Jul 2009
Location: Ohio, USA
Posts: 169Rep Power: 9
|July 22, 2010, 01:43||
Join Date: Mar 2009
Posts: 3,160Rep Power: 32
For the same geometry, if you are modifiying the velocity, then you are modifiying also the Reynolds-number. Then you need to modify also turbulence BC (if you are in turbulent domain)
I can imagine that it takes more or less iterations to converge if you perturb the inlet BC.
But your goal is getting a converged solution, that's all.
In memory of my friend Hervé: CFD engineer & freerider
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