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Showing results 1 to 8 of 8 Search took 0.00 seconds. Search: Posts Made By: jakubstary

Forum: Main CFD Forum May 17, 2013, 18:32

Replies: 14 Main advantage of using Runge Kutta of higher order? Views: 2,908 Posted By jakubstary I discovered an interesting thing. I found... I discovered an interesting thing. I found Masatsuka's code http://www.cfdbooks.com/cfdcodes/oned_euler_v1.f90, where he solve same problem as me. I implemented even Euler method to his code. I...

Forum: Main CFD Forum May 17, 2013, 10:32

Replies: 14 Main advantage of using Runge Kutta of higher order? Views: 2,908 Posted By jakubstary Aeronautics El. K.: Of course I do the same :-)... Aeronautics El. K.: Of course I do the same :-) I'm trying to solve it for about two weeks :-(. Thank you for your willingness to help. If someone will have some idea or tip for book, where can I...

Forum: Main CFD Forum May 17, 2013, 09:57

Replies: 14 Main advantage of using Runge Kutta of higher order? Views: 2,908 Posted By jakubstary Please, Aeronautics El. K. don't you have any... Please, Aeronautics El. K. don't you have any idea, why Runge Kutta behave strangely for my case? Thank you.

Forum: Main CFD Forum May 17, 2013, 08:03

Replies: 14 Main advantage of using Runge Kutta of higher order? Views: 2,908 Posted By jakubstary I'm solving Euler equations. For case which is on... I'm solving Euler equations. For case which is on graph I used simple Lax-Friedrichs scheme for spatial discretisation.

Forum: Main CFD Forum May 17, 2013, 07:09

Replies: 14 Main advantage of using Runge Kutta of higher order? Views: 2,908 Posted By jakubstary e is sum L1 error between numerical solution and... e is sum L1 error between numerical solution and exact solution of Riemann problem.

Forum: Main CFD Forum May 17, 2013, 06:43

Replies: 14 Main advantage of using Runge Kutta of higher order? Views: 2,908 Posted By jakubstary And is it correct, that Euler is more accurate... And is it correct, that Euler is more accurate for small CFL condition than RK2 and RK4? I thought RK2 is always more accurate than Euler, but in my program not, see graph. Thank you very much....

Forum: Main CFD Forum May 15, 2013, 03:28

Replies: 14 Main advantage of using Runge Kutta of higher order? Views: 2,908 Posted By jakubstary I have tested the Euler method and the RK2 method... I have tested the Euler method and the RK2 method for increasing CFL and I get this result. Don't anyone know if it's correct result? If not, don't you have an idea where might be error in my...

Forum: Main CFD Forum May 14, 2013, 04:41

Replies: 14 Main advantage of using Runge Kutta of higher order? Views: 2,908 Posted By jakubstary Main advantage of using Runge Kutta of higher order? What is main advantage of using 2nd and 4th order Runge Kutta methods for time discretization? Is it stability for larger CFL condition or Runge Kutta is more accurate for same CFL condition? I...

Showing results 1 to 8 of 8

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