Flat residuals?
 

Hi

I am simulating a steady state flow in a box. It is a compressible flow. I am using total pressure at the inlet = 101326 and static pressure at outlet = 101325.

My problem is that my residual become flat after 20 iterations and I do not observe any change in them. How can I achieve convergence in a such case? Thanks in advance for your help.

Ahmed

Re: Flat residuals?
 

1 Pa pressure difference seems to be too low to get the flow go through your domain.

Re: Flat residuals?
 

Hi Kumar

Unfortunately, thats how things are. Is there a way to achieve convergence for this case.

The corresponding velocity for 1 Pa pressure is about 2 mm s^-1. It should make it to other side. Thank you

Re: Flat residuals?
 

http://www.cfd-online.com/Wiki/Ansys...gence_criteria

Re: Flat residuals?
 

Thank you Glenn. This is very helpful.

Ahmed