Hypersonic flow over double wedge
Hi! I want to analyze the shock interactions in a hypersonic flow over a double wedge. My Mach number is 9. I generated an unstructured mesh with about 2lakh elements. I chose such a large number because my instructor says that the mesh has to be very refined for such flows.I am new to CFD and Fluent and I am not sure in how many iterations my solution should converge. I set the residuals to 1e-5. Even after about 80000 iterations, the residual was still at 1e-2. Is this natural or am I doing something wrong? Also, how long do these computations usually take? Please help. Thanks a lot.
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A not converged solution can be caused by various setting ? probably your mesh, probably you boundary conditions. have you followed any tutorial before ?
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good, how about your mesh ? are working in 3d or 2D ?? structured or unstructured ? i have work with supersonic flow, they are very very difficult to converge, did you run the simulation with 1st order then switched to second ?
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deciding what order should depend on the nature of the flow, and not the simplicity of the geometry. hypersonic should be difficult to predict. i suggest you start with a density based, first order see what you get...
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