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## Implementation of heat diffusion (Laplacian term) in Thermo-mechanical coupled VUMAT

Tue, 2011-05-17 16:46 - gnoij»

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## Problem in implementation of free volume diffusion equation

Mon, 2011-04-11 14:59 - gnoijChoose a channel featured in the header of iMechanica:

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## A boundary element formulation problem

Wed, 2010-05-05 17:07 - ahmed.husseinI am working on some boundary integral equation formulation and I am currently stuck with some mathematics. I wish anyone can help me out with this.

I have an anisotropic (sometimes called generalized) biharmonic differential operator which takes the form

L = k11 D1^4 + k12 D1^2 D2^2 + k22 D2^4

where D1 = d/dx, D2 = d/dy, my problem is two dimensional.

I need to find a fundamental solution (Green's function) for this operator, that is

L(u) = -delta

where delta is Dirac delta function.

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