high-order difference in OpenFOAM
 

Hello,

I want to implement a high-order difference sheme which is 4 or 5 order, but it seemed that the difference order is just up to 3 order, the difference template in OpenFOAM now is just two cells, but the high order（4or5） will need more than 3 neighbor cells, so who can tell me how to implement the high order difference with the smallest modify with the current C++ code?

Hello, i tried to implement high-order schemes in OpenFOAM (WENO + k-exact) one year ago, but i found, that i don't know how to select proper stencil for scheme. If You will help with mathematics, then i can help you with implementation

Thank you for your reply, and I don't quite get what do you mean " i don't know how to select proper stencil for scheme"? the scheme that we want to implement is WCNS scheme. So can you give me some advice or with a example code of high-order sheme? Thanks very much!

what you said had been solved in a paper "High Order Schemes on Three-Dimensional General Polyhedral Meshes—Application to the Level Set Method", it maybe help you.

Hi,

Can I ask you whether you have implemented this high order (WENO) method within OpenFOAM, or not yet? If yes, can you please kindly tell me is it available somewhere?

Regards,
Reza

WENO in openFoam
 

Hello, Were you able to implement WENO scheme in OpenFOAM?

Hi there,

You can find some suitable information in the post below:

https://www.cfd-online.com/Forums/op...-problems.html

Regards,
Reza