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#1 |
Guest
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Hi everyone,
I am currently trying to verify my finite volume code with the a channel flow problem(Re_tau=180). My question is regarding the setup of the problem. I prescribed a constant pressure gradient to drive the flow. Do I also prescribe the wall shear stress value(Tau_w) or should I just set the wall boundary condition as no slip? Please help me as I am still a little confused. |
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#2 |
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no-slip
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#3 |
Guest
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otd,
thanks for the quick reply. If the wall boundary was set to no-slip(no wall shear prescribed), how does the program know the "roughness" of the channel? |
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#4 |
Guest
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I don't know. It has to depend on what you've built into the code. So it's a modeling question - and, if it's your code, you're the modeler.
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#5 | |
New Member
ronak
Join Date: Jul 2011
Posts: 6
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Quote:
Hi ,I m also work with some DNS data IN RE-taw=180. I have 130*130*130* grid point in 5 timewindows. The pressure Gradient is 1.I try to find Taw-Av on the wall. it should be near 1, but My simulation give me a wrong value. I USED THIS statement for TAW. IS IT POSSIBLE TO HELP ME? taw(i,k,n)=(U(i,1,k,n)-U(i,1,0,n))/(yc(1)-yc(0)) I OBTAIN the diffrence of u at each grid for J=0 AND 1 |
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#6 | |
Senior Member
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,830
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