discretization of laplace equation using FVM
Hello, Guys,
I am using FVM to discretize the Laplace equation on unstructured meshes (cellcenter based) and found out that it is not accurate to compute gradient across the interface by two point finite differencing. If I use least square or Green's theorem to compute the gradient, the matrix becomes very complex. Is there any way to increase the accuracy of gradient computation across the interface? Thanks in advance. Stein 
Re: discretization of laplace equation using FVM
if you go to the CFDwiki, i have written descrisation of poission eq. for FVM, you can use the same for Laplace. Have a look.

Re: discretization of laplace equation using FVM
I got it. Nice page, thanks.

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