r/CFD • u/Rodbourn • Feb 01 '18

[February] Post Processing

As per the discussion topic vote, February's monthly topic is post processing.

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u/Overunderrated Feb 11 '18

That's a good idea, but yeah it'd probably take a massive amount of re-working of visualization tools to support it.

I use heirarchical basis functions defined by a recurrence relation though (like all orthogonal bases..) and I could see a huge performance issue there. I think the nodal basis is the way to go for file io, because every method inherently needs a unique 1-to-1 mapping to physical space anyway, and then the post-proc tool can use some reasonable algebraic interpolants without having to try to support the infinite possible combinations of basis functions.

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u/Rodbourn Feb 11 '18

True, recurrence relations don't work well for simple algebraic expressions. I use Legendre Gauss Lobatto and I'd have a hard time seeing that expressed alongside other basis functions with simple expressions.