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how to calculate mixed derivative

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Old   February 15, 2013, 13:39
Default how to calculate mixed derivative
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Mieszko Młody
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Dear Foamers,
Is there any way to compute second order mixed derivatives ?

But different than using twice grad operator ?

Thanks !
ZMM
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Old   February 15, 2013, 14:03
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e.g.
could mixed derivative as:
\frac{\partial^2 f}{\partial x \partial y}
be calculated using fvc::laplacian method, as follows:
HTML Code:
nu = (0 1 0 0 0 0 0 0 0 ); 
fvc::laplacian(nu,f)
??

It does something, but I am not sure what ...

Thanks
ZMM
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