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backward facing step problem

Hi,

I tried to solve incompressible NSEs on lid cavity problem and the results look fine (simple algorithm, collocated). However, when I switch to backward facing step problem, the solution can not converge. The things confuse me most are the boundary conditions of pressure correlation/velocity-u at inlet and outlet.

So, is there any one can make a short summary for me about the correct BC setting for backward facing step problem.

Thanks in advance!

Quote:

Originally Posted by ian8430 (Post 290895)

hi,

i tried to solve incompressible nses on lid cavity problem and the results look fine (simple algorithm, collocated). However, when i switch to backward facing step problem, the solution can not converge. The things confuse me most are the boundary conditions of pressure correlation/velocity-u at inlet and outlet.

So, is there any one can make a short summary for me about the correct bc setting for backward facing step problem.

Thanks in advance!

hi ..i think i can help you...
Send me a copy of your code ...i will send you the modified code
morteza08@gmail.com