dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Thu, Mar 12, 2009 at 09:12:48PM +0000, Garth N. Wells wrote:
> 
> 
> DOLFIN wrote:
> > One or more new changesets pushed to the primary dolfin repository.
> > A short summary of the last three changesets is included below.
> > 
> > changeset:   5860:54b6f356ba99be68a5caa08fa66031fc1572ac0e
> > tag:         tip
> > user:        "Johan Hake <hake@xxxxxxxxx>"
> > date:        Thu Mar 12 22:00:22 2009 +0100
> > files:       dolfin/function/SpecialFunctions.cpp dolfin/function/SpecialFunctions.h site-packages/dolfin/specialfunctions.py
> > description:
> > Added a SUPGStablizer built in function
> >   sigma - diffusion coeffisient
> >   a     - advective field
> >   s     - SUPGStabilizer(a,sigma)
> >   v     - TestFunction
> > 
> >   # SUPG stabilized TestFunction
> >   v = v + dot(s,grad(v))
> > 
> >   (Will add a demo later)
> >
> 
> Some of this is pretty specific, e.g. tau = 1/std::tanh(PE)-1/PE. I'm 
> not convinced that it should be in SpecialFunctions (very worthwhile in 
> a demo though which users can mimic).
> 
> Garth

I think it could be useful to have. We could also add other optional
stabilizers. It's in SpecialFunctions after all. It's a matter of
taste how special the functions can be.

-- 
Anders

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