dolfin team mailing list archive

["Johan Hoffman" <jhoffman@xxxxxxxxxx>]

> On Tue, Feb 12, 2008 at 10:23:09AM +0100, Dag Lindbo wrote:
>> Hello all!
>>
>> In the stokes demo (taylor-hood), I notice spurious pressure spikes near
>> the corners. What is causing these?
>>
>> I changed to a paraboloc inflow profile (consistent with the no-slip
>> BCs),
>> but the problem remains. Further, I ran the same problem on a unitsquare
>> mesh (see plot attached). The pressure spikes are large. Is the demo
>> problem ill posed?
>>
>> Thanks!
>> Dag Lindbo, KTH
>
> I would also suspect the boundary conditions for the velocity
> to be the problem, but if you still see the spikes with a parabolic
> inflow profile (which is zero at the no-slip boundaries) then I have
> no idea.
>
> --
> Anders

Is this in all corners? Could you send a plot?

/Johan

> _______________________________________________
> DOLFIN-dev mailing list
> DOLFIN-dev@xxxxxxxxxx
> http://www.fenics.org/mailman/listinfo/dolfin-dev
>