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May 16, 2022, 09:38 |
Derivatives using WENO
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#1 |
New Member
Join Date: Aug 2021
Posts: 3
Rep Power: 5 |
Hi,
I’d like to ask you for some help. Could anyone explain me how to obtain higher order derivatives (eg. up to 3rd) using WENO schemes? Preferably step by step. I try to use higher order WENO scheme on finite volumes in my code and I think I understand this method well enough. It seems to work. I’m using Legendre polynomials for reconstruction. However, I don’t think I get the derivatives right, as some of the values seem to be wrong. Unfortunately, I haven’t found any precise description how to do it. How to get the proper weights, smoothnesses indicators and polynomials? I’m unfortunately not an expert on numerical methods. Therefore I am here asking if you could help me and explain the procedure so I could definitely get the derivatives right? Best regards, thanks in advance. |
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May 18, 2022, 17:41 |
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#2 |
Senior Member
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Join Date: Jul 2012
Location: Germany
Posts: 184
Rep Power: 14 |
Generally people use precomputed numbers available from original papers. There the procedure is decribed quite well:
Essentially non-oscillatory and weighted Very high order WENO
Regards |
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Tags |
derivative, high order scheme, weno |
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