Yup, what I am trying to implement specifically is the model proposed in this paper: http://dl.acm.org/citation.cfm?id=156977. If you don't have access to it, I can write down the equations here. But at least the abstract should give a good idea about the phenomenon it is simulating.
One thing...
I am working on implementing a PDE model that simulates a certain physical phenomenon on the surface of a 3D mesh.
The model involves calculating mixed partial derivatives of a scalar function defined on the vertices of the mesh.
What I tried so far (which is not giving good results), is this...