I am doing a CFD analysis with AcuSolve on a centrifugal pump. I realized a 2D-mesh with trias of 2mm and the "check elements" doesn't show any kind of problem. For the 3D-mesh I used CFD tetramesh where I selected the carter on the comps of "With BL (fixed)", the section of Inflow and Outflow in the comps "W/o BL (float)" and the solid impeller in the comps "With BL (float)" selecting "swap only" and "All are fluid volumes". In the BL parameters I have chosen 3 layers with first layer thickness of 0.010 and BL growth rate of 1.200. When I realised this 3D-mesh I can see in the check elements that some tetra elements collapsed and some elements give me problem in the Jacobian; is this important for the convergence of the analysis? How can I solve this problem?
However, if I continue the process, I set in the solver a "steady state" analysis, the model "Spalart allmaras" and in the mesh type I chose "fully specified" so I can insert the rotation of the impeller. For the fluid I added the default "Water", for the Inflow I chose a pressure of 1e5 N/m2 and the viscosity of 1e-6 m2/sec. In the outflow I selected a "Wall" type and for the Impeller I chose "Wall" type putting in a Mesh Motion where I set the rotation around 1 nodes of 314 rad/sec. When I launch it, AcuTail shows: warning: Potential errors in boundary conditions; if I open the warning file appears a list of nodes and it says: WARNING: Missing nodal/element BC for fluid boundary node. How can I solve this problem?
Thank you very much!