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shock detection in the Riemann problems(specially in the stationary contact problems)

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Old   July 9, 2010, 11:22
Thumbs down shock detection in the Riemann problems
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S M Khan
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Hello!
i am not able to detect the shock correctly in the Riemann problems and getting large oscillations due to this reason.
thanks
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Old   July 9, 2010, 11:25
Question shock detection in the Riemann problems(specially in the stationary contact problems)
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Hello!
i am not able to detect the shock correctly in the Riemann problems and getting large oscillations due to this reason. pliz let me know what conditions should be put to eliminate the oscillations.
thanks
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Old   July 9, 2010, 15:27
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Are you using a commercial code or your own code ?
Also can you describe the initial settings for your problem:
1d/2d
T,p,v ... at t=0.

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Old   July 10, 2010, 03:28
Question shock detection
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Hi DoHander!
i am using own code. actually i m working on Riemann Problem, conditions are
domain length=1.0, interface x=0.8,RHO_L=1.0,U_L=-19.59745,P_L=1000and
RHO_R=1.0,U_R=-19.59745,P_R=0.01. L stands for left and R stands for right.
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Old   July 10, 2010, 08:25
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First you should have an analytical solution for your problem if you don't have one (you can compare this with the numerical one):

J.D. Anderson - Modern compressible flow.

Second - if your numerical solutions oscillates you probably have an implementation problem: maybe with your boundary conditions or maybe with the order of the numerical scheme you use. For a second order scheme (and high orders) you must use limiters functions in order to remove the oscillations (or you can try with a very fine mesh).

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