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#1 |
New Member
Kathrin
Join Date: Jun 2012
Posts: 9
Rep Power: 14 ![]() |
Hello,
for my studies, I've to develop a solution method for the mach-number-independence principle which is valid for very high mach-numbers. In my case I assume - ideal gas, - inviscid flow, - flow over a blunt body, - 2D flow, - steady flow (at the end of the iteration), - shock fitting. In nondimensional form the systems consists of Crocco's theorem (a combination of the momentum equation and the first and second law of thermodynamics) with two equations for ![]() ![]() and the gas dynamic equation which is a combination of the momentum and the coninuity equation and yields for ![]() with entropy ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() I know that the system is elliptic and hyperbolic in space depending on the local velocity. So a time-dependent method must be applied. I already used MacCormack (without artificial viscosity) for a very simple case which was a 1-D streamline but the system didn't converged and became unstable. ![]() Can anybody help me to find the mistake or has anybody even already implemented these equations??? ![]() |
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Tags |
hypersonic, maccormack, oswatitsch, time dependent |
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