UDS help?
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hi
I am beginner in fluent. I have a problem that have a convective B.C in outlet as follows: http://www.cfd-online.com/Forums/dat...AAAElFTkSuQmCCAttachment 14765 that http://www.cfd-online.com/Forums/dat...AAAElFTkSuQmCC is a independent variable p,v and T. can anyone help me for this case?? thanks .. |
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Dear friend,
you can consider phi as a scalar and solve a modified UDS equation for that easily and set a Dirichlet BC instead, but I think you meant that phi is a dependent variable. Bests, |
thanks amir
but phi is a independent variable. but i dont know that what to do and begin from which step? this is the problem of channel that air passes through it. |
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(d/dt)(phi)+ U(d/dx)(phi)= 0
phi is pressure, tempreture and avreaged x-velocity (U) |
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1) using a separate UDS equation but it may face some difficulties in its own BCs 2) write a UDF like this: phi_new=phi_old-U(d/dx phi)*dt which is a approximation. Bests, |
thanks
in situation 2 i have to use flux uds? |
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thanks amir
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