Hello,nSince this is a Fluids simulation, the first thing I'd do is to set the 'Physics Preference' (under details of 'Mesh') to Fluent. Next, I'd definitely provide specific edge sizing (number of divisions and the necessary biasing) for every single edge in your geometry. This will make the meshing tool pick these dimensions explicitly.nPlease try these are let us know if the behavior improves.nThanks.nKarthik