yplus (wall shear) saw-like shape -- CFD Online Discussion Forums

March 30, 2011, 03:32	yplus (wall shear) saw-like shape	#1
potac Member Jan Potac Join Date: Aug 2009 Posts: 30 Rep Power: 16	Hi all, I have been simulating a air flow around a 2D curved roof building in CFX. When plotting values of wall shear or yplus along the roof I obtain saw-like steps. I have tried different mesh resolutions (yplus<50, <1000), turbulence models (KE, SST), schemes (upwind, high resolution), but those steps or waves remain. I ran it steady and transient using different time steps but without any improvement. Can someone give me some hint I should focus on, please? Thank you. J.

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