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Forum: OpenFOAM Running, Solving & CFD

August 4, 2011, 12:24

Replies: 4

differentiation in one direction

Views: 1,848

Posted By ziemowitzima

It seems that problem can be solved (after...

It seems that problem can be solved (after Akidess suggestion ):

"... it sounds like you want anisotropic diffusion - why not just pass a diffusion coefficient tensor to laplacian instead of a...

Forum: OpenFOAM Running, Solving & CFD

August 2, 2011, 17:52

Replies: 4

differentiation in one direction

Views: 1,848

Posted By ziemowitzima

so far I found such explicit solution: ...

so far I found such explicit solution:

volVectorField gradT=fvc::grad(T); // (T_x, T_y)
volScalarField Txxxx = gradT.component(0); // T_x
gradT = fvc::grad(Txxxx); // (T_xx, T_xy)
...

Forum: OpenFOAM Running, Solving & CFD

August 2, 2011, 11:10

Replies: 4

differentiation in one direction

Views: 1,848

Posted By ziemowitzima

Thanks :) This I know. I didn't put it...

Thanks :)
This I know.
I didn't put it explicit in my question but I need to know how to make it in OpenFOAM.

-Best

Forum: OpenFOAM Running, Solving & CFD

August 1, 2011, 18:39

Replies: 4

differentiation in one direction

Views: 1,848

Posted By ziemowitzima

[solved]differentiation in one direction

Dear Foamers,

Does anyone of you know what is the best way to dicsretize following problem:
we have: f(x,y) -- scalar function

we need: f_xxxx
(fourth order) differentiation but only in one...

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