Wrong Reynolds stress in channel tutorial
5 Attachment(s)
I run channel tutorial in OpenFOAM 1.5.x, I make "postChannel", then I visualize the results... here we are some plots:
Umean: Attachment 998 It's quite good, but it seem to be a mix between a channel U mean profile and jet profile. u_rms: Attachment 999 v_rms: Attachment 1001 w_rms: Attachment 1002 uv: Attachment 1000 Fluctuations and Reynolds stress are totally wrong!!! From the initial condition they grow up in the middle of the channel. Have you any suggest? I modify a little bit the tutorial. My channel is: x*y*z: 3.5*2*2 nx*ny*nz: 80*180*120 nu: 4*10-5 (to have Re_tau ~ 180) I use CrankNicholson for temporal interpolation and I try: CrankNicholson 1 CrankNicholson 0.75 CranKNicholson 0.5 all lead to the results post. Where am I wrong? Thank you very much! Best regard MT |
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