About convergence

February 10, 2009, 00:34

Hi,

I am simulating incompressible flow which has velocity inlet and two pressure boundary conditions.After doing 4000 iterations i found that velocity field is still developing but residuals have gone below 10-5.Also i see that at inlet pressure value is not constant. Can anybody please suggest me what to do in order to get converged solution?

February 10, 2009, 04:28

Are you using a turbulence model? You may have to ask yourself the question; Is the flow still developing or has it developed and is just unsteady? You may have to switch to transient and set your own (more appropriate) time-step.

TOm

February 10, 2009, 00:34	About convergence	#1
S.B.J. Guest Posts: n/a	Hi, I am simulating incompressible flow which has velocity inlet and two pressure boundary conditions.After doing 4000 iterations i found that velocity field is still developing but residuals have gone below 10-5.Also i see that at inlet pressure value is not constant. Can anybody please suggest me what to do in order to get converged solution?

February 10, 2009, 04:28	Re: About convergence	#2
Tom Guest Posts: n/a	Are you using a turbulence model? You may have to ask yourself the question; Is the flow still developing or has it developed and is just unsteady? You may have to switch to transient and set your own (more appropriate) time-step. TOm

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