convergence problem
 

Dear all,

I have a question about convergence criteria by using surface motior. If the residual is oscillatiing but lower than 1e-3 and surface monitor is also oscillating around a constant, is the solution converged?

Any reply is welcome.

regards, sarah

Re: convergence problem
 

Dear my friend

I have a suggestion for convergence criteria. in addition to residuals you can plot the variation of a parameter as velocity magnitude at a point in your flow domain as the fluent runs. if the magnitude of this parameter reaches to a constant value it means that the solution is converged. hope it will help you.

Best wishes A.safarzadeh

Re: convergence problem
 

What are you trying to simulate? It could mean that your problem is unsteady. You could change to the unsteady solver and monitor the surface variable with time to see if it exhibits an oscillatory pattern.

Thanks a lot
 

Hi,dear

Thank you all for kind reply! I will try according to your advise.

sarah

Re: Thanks a lot
 

hi, in monitors if residual is reducing with simulation then it is going to converge

To nabeel Re: Thanks a lot
 

Thanks a lot!

could you give me more hints?

thanks

sarah