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Old   August 18, 2014, 09:12
Default simple divergence
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ali
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i have divergence at high Re number in my simple code and it gives negative pressure and unusual osilation
but as i know simple doesnt need turbulent model to converge at high Re !!
how can i over come to this problem
thanks
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Old   August 18, 2014, 17:17
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ABDUL GAFOOR CP
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hii....
can you elaborate the details of the problem...
and also one reason for divergence of solution will comes from mesh generation...
regards
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Old   August 19, 2014, 16:14
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Hi,

Did you check your solution for low Re? Plz give the details of the simulation you are doing. You can try the simulation with lower cfl no than what you are using already.
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Old   August 24, 2014, 14:31
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Quote:
Originally Posted by Vino View Post
Hi,

Did you check your solution for low Re? Plz give the details of the simulation you are doing. You can try the simulation with lower cfl no than what you are using already.
im using patankar's simple method with hybrid scheme and my cfl no is letter than 1
in low Re the converging is very well but in high Re it has a very large divergences and negative results for pressure and velocity
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