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NaN/inf value error
Posted 6 ott 2025, 04:40 GMT-4 Computational Fluid Dynamics (CFD), Geometry, Modeling Tools & Definitions Version 6.2 0 Replies
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I'm trying to simulate a cylindrical gas bearing with a sort of foil "floating" on it but I keep getting the same error: Undefined value found. - Detail: Undefined value found in the equation residual vector. There are 7 degrees of freedom giving NaN/Inf in the vector for the variable comp1.spatial.u. at coordinates: (1.94255,-0.112035,0.0920496), (1.94284,-0.111364,0.09286), (1.94356,-0.111577,0.092605), (1.94329,-0.111264,0.0930404), (1.9433,-0.111842,0.0923323), ...
I don't think my mesh is the problem as well as my boundary conditions. I suspect it is something to do with my geometry although I also have the feeling that is correct as well. The model was working when I used the fluid-structure interaction model but I wanted to model smaller thickness of the foil and decided to change to fluid-shell interaction but then it did not work anymore whilst the boundary conditions basically have not changed compared to the previous model that did work. To get a surface from my previous model I have used the tool "Convert to surface" where I had a finite thickness ring around the gas bearing. What could be the problem here and where should I be looking to solve this problem?
Hello Huub Reitsma
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