dolfin team mailing list archive

[Johan Jansson <johanjan@xxxxxxxxxxxxxxxx>]

On Tue, Jun 13, 2006 at 10:48:07AM +0200, Johan Hoffman wrote:
> 
> Ok. A solid model is an option, but it seems that a membrane model may be
> sufficient. I'll see what I'll do. Adding a membrane model to Ko may then
> later be a natural step, which probably does not take too much effort?
> 
> This connects also to a previous discussion on obtaining a surface mesh
> automatically from a volume mesh. With a membrane model the equations
> would be solved on the surface mesh being the boundary of the fluid volume
> mesh. The resulting coupling as a fluid-stucture interaction problem could
> be quite a challange depending on the properties of the solid vs fluid.
> 
> /Johan
> 

Yes, I think a membrane model will be necessary at some point. I
haven't looked into it so much yet, I think it's a good principle to
keep things simple unless absolutely necessary. I guess the main
property of the membrane model which we haven't considered in Fenics
is that we have triangular cells in 3D.

I assume the application here is blood vessels or something similar? I
think the walls in that case are quite thick w.r.t. the diameter,
something like 5-10%, so I don't think a membrane model is
applicable. It's probably unavoidable in other applications though,
where you have a very small thickness and performance is paramount.

  Johan