[H.Xia]

Hi all,

I am working on basic coding with interFoam solver, and I try to compare the difference between two velocity fields:
1. U is the one-field velocity solved from the governing equations
2. Un is reconstructed from phi, which is the flux.
Un = fvc::reconstruct(phi)

Normally, the two fields should be the same (right? if not, please correct me), however, in my simulations, I found that U is a little bit large than Un, and you can find the attached figures which can help you to understand my question.

I hope you can give me some suggestions on this problem.

Many thanks,
H. Xia

[mAlletto]

It's not the same. fvc:reconstruct is made to smooth out oscillations and therefore it smoothed out also steep gradients. Some detailes can be found in https://www.researchgate.net/publica...reconstruction and references therein.

Of course the source code helps and maybe some googling


Best

Michael

[H.Xia]

Hi Michael,

Thank you very much,

H.Xia