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I have an air model for an un-steady state CFD that meshes without any warnings or reported problems during meshing or model check. I'm using analysis parameters that work fine on similar models. During the start of analysis, after verification with no errors I get a message that says "zero component in diagonal" and the analysis stops. What is this and how might it be fixed?
I'm no expert on the CFD package, but my first thought is that it may be related to material properties or element distortion. Are there any warnings in the log file about element distortion, zero Jacobians and so on? Are all material properties defined properly?
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