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Sudden drop in convergence plots

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Old   December 8, 2015, 15:12
Default Sudden drop in convergence plots
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Hi

Please forgive me if I've put this question in the wrong section or if the answer is very simple etc.

I am using a very basic euler code with runge-kutta and have applied it to a prandtl meyer expansion on a corner transitioning from mach 1 to 4. In the convergence plot of the residuals there is a large sudden drop of all flow variables. What is a potential cause of this drop?

Many thanks for any help.
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Old   December 8, 2015, 15:35
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Quote:
Originally Posted by Easyqus View Post
Hi

Please forgive me if I've put this question in the wrong section or if the answer is very simple etc.

I am using a very basic euler code with runge-kutta and have applied it to a prandtl meyer expansion on a corner transitioning from mach 1 to 4. In the convergence plot of the residuals there is a large sudden drop of all flow variables. What is a potential cause of this drop?

Many thanks for any help.
what about your definition of resduals in the equations?
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