Hello Karthik,nnthank you very much for your reply.nThe problem is that the simulation gets initialized with the false values aswell. So the flowfields Ma-number is too slow and therefore the results are wrong.nYes exactly, I know that. Do you know which formulas FLUENT uses to calculate the reference values and those to initialize the flow field? In the User Guide I found the isentropic equations for the total pressure and Temperature for example. nSo it still isn't clear to my why/how FLUENT calculates those Refernce Values wrong and how I can fix this.nnThank you very much.n