ufl team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Tue, Apr 07, 2009 at 02:48:44PM +0200, UFL wrote:
> One or more new changesets pushed to the primary ufl repository.
> A short summary of the last three changesets is included below.
> 
> changeset:   811:b96d2bbe8284a7255ca510c2fbb35b1445f85a11
> tag:         tip
> user:        "Martin Sandve Alnæs <martinal@xxxxxxxxx>"
> date:        Tue Apr 07 14:50:30 2009 +0200
> files:       doc/manual/chapters/formlanguage.tex ufl/operators.py
> description:
> Added support for this syntax:
> 
> x = cell.x
> Df = diff(f, x)
> 
> Note that
>   diff(f, x) == grad(f).T
> because of the way diff is defined.
> Thus diff(f,x) is the same as the FFC grad.
> If we want to change this, it touches a lot
> of places in AD code, so that won't happen now.

How should the Navier-Stokes convective term be expressed in UFL?

I guess one needs to write

  grad(u).T*u

?

-- 
Anders

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