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

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 July 9, 2010, 11:22 shock detection in the Riemann problems #1 New Member   S M Khan Join Date: Sep 2009 Posts: 17 Rep Power: 9 Sponsored Links Hello! i am not able to detect the shock correctly in the Riemann problems and getting large oscillations due to this reason. thanks

 July 9, 2010, 11:25 shock detection in the Riemann problems(specially in the stationary contact problems) #2 New Member   S M Khan Join Date: Sep 2009 Posts: 17 Rep Power: 9 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

 July 9, 2010, 15:27 #3 Senior Member   Join Date: Nov 2009 Posts: 411 Rep Power: 12 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. Do

 July 10, 2010, 03:28 shock detection #4 New Member   S M Khan Join Date: Sep 2009 Posts: 17 Rep Power: 9 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.

 July 10, 2010, 08:25 #5 Senior Member   Join Date: Nov 2009 Posts: 411 Rep Power: 12 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). Do

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