Re: [Libmesh-devel] [Libmesh-users] Averaging element fields to the nodes.

[Kirk, B. (JSC-EG311) <ben...@na...>]

That method lets you conveniently access all the elements sharing a given node, which is not what you want in this case. 

The usual way to do this is by solving an L2 projection onto a continuous field - think of this as finding the continuous gradient field that best approximates your discontinuous field in a least-squares sense. 

I don't think there are any examples that currently show this - I'll try to add one after the next release.

Given that it is a common-enough post processing task, we might start a discussion on the development list as to how to best provide this as a core library service...

-Ben

 

On Oct 29, 2012, at 3:41 AM, "Subramanya Gautam Sadasiva" <ssa...@pu...> wrote:

> Hi, 
> I need to extrapolate element fields to the nodes in order to compute approximate gradients for some quantities defined at the quadrature points. What is the easiest way to accomplish this?
> I saw meshtools has a nodes to elem map function.Does this work for parallel meshes?
> Thanks.
> Subramanya 
> 
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