On Mon, Jul 04, 2011 at 05:45:10PM -0500, Roy Stogner wrote:
>
> On Mon, 4 Jul 2011, Robert wrote:
>
> > I have some trouble with the accuracy of the displacement gradient in
> > moving mesh situations.
>
> Sadly that may not be the end of your troubles in moving mesh
> situations; I wrote that ALE code for an application which in the
> near-term ended up switching to a fixed-mesh model, and I wouldn't be
> suprised if there are still serious bugs. I'd like to help you fix
> whatever you encounter, but you ought to be warned ahead of time that
> that feature isn't expected to be fully stable and working right now.
>
> > I have attached a minimal example to reproduce my problem.
>
> It looks like the mailing lists stripped your attachment? Would you
> try again, and Cc: me in case it doesn't make it to the list again?
I have attached it again and additionally posted it here:
> http://dpaste.de/HYZa/
Robert
> There are a couple places in the code where we "cheat" and use finite
> differencing for gradients, but IIRC in those cases it's the Hex code
> that uses precise formulae and the Tet code that cheats. And I don't
> think we do any of that with the Lagrange FE, which is what you should
> be using for ALE geometry.
> ---
> Roy
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