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Need urgent advice about Laminar flow analsys

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Old   March 12, 2005, 11:12
Default Need urgent advice about Laminar flow analsys
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Taskin
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hi,

I'm making a study on a body previously experimented in a wind tunnel. Firstly I'm making analsys for laminar flow but both coupled and segregated solver gives very high drag coefficient values. Lift coefficient is near but still very inaccurate. Segregated solver is much far than the coupled solver. But still there is a difference of about ten times. is this related with some parameters of the solver or the mesh itself? I have made courant number 9 at first and 5 later during the solution with the coupled solver but it didn't work.. So could anyone give me advice about figuring out the situation?

Thanks,
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Old   March 14, 2005, 04:01
Default Re: Need urgent advice about Laminar flow analsys
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Luca
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About the couples solver I suggest before iterating with the first order. Then change to the second order. Use the default Courant number (5). Then when evetuthing seems to be nearly converged you can raise the Courant number. The segregated solver is faster but I would use the coupled if the Mach number is high.
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