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FLUENT - Tips for converging a highly compressible case using the segregated solver
This solution contains a suggested procedure to converge highly compressible flow cases with the segregated solver.
-use incompressible (constant density)
-use default limits (Solver-> Controls->Limits)
-use default discretization and under-relaxations (Solve->Controls->Solution)
-use default Multigrid Solver settings (Solve ->Controls->Multigrid)
-initialize at average pressure
-iterate to converge (may change URF)
-change to ideal-gas law
Take volume-average of static pressure
Patch pressure ONLY to the average value.
It should converge nicely.
-you may continue with 2nd-order flow