noSlip and constantAlphaContactAngle -- CFD Online Discussion Forums

January 8, 2020, 13:30	noSlip and constantAlphaContactAngle	#1
joshmccraney Senior Member Josh McCraney Join Date: Jun 2018 Posts: 220 Rep Power: 8	Hi! I'm modifying the damBreak tutorial. In the script 0/alpha.water.orig I can specify one of the walls as type constantAlphaContactAngle, thereby specifying the contact angle at the wall. In the script 0/U I can specify the same wall as type noSlip. However, when I run the tutorial now, we see that the velocity does slip along the advancing front (fluid moves up and down, splashing along the wall). Can someone explain why noSlip seemingly does not enforce the no-slip BC everywhere along the wall? razi.me05 likes this.

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