[dune-pdelab] dune-pdelab Digest, Vol 28, Issue 5

[Jared Okiro]

On 01/10/2012 12:00 PM, dune-pdelab-request at dune-project.org wrote:
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>     1. Re: dune-pdelab Digest, Vol 28, Issue 2 (Markus Blatt)
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>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 10 Jan 2012 11:51:41 +0100
> From: Markus Blatt<markus at dr-blatt.de>
> Subject: Re: [dune-pdelab] dune-pdelab Digest, Vol 28, Issue 2
> To: dune-pdelab at dune-project.org
> Message-ID:<20120110105141.GC19948 at dr-blatt.de>
> Content-Type: text/plain; charset=us-ascii
>
> On Mon, Jan 09, 2012 at 03:12:43PM +0100, Jared Okiro wrote:
>> On 01/09/2012 02:33 PM, Markus Blatt wrote:
>>> On Mon, Jan 09, 2012 at 11:06:28AM +0100, Jared Okiro wrote:
>>>> On 01/09/2012 09:35 AM, Markus Blatt wrote:
>>> Please answer the following questions:
>>> - Which example file are you referring to
>>>    (convection-diffusion/dgdiffusion.cc)?
>>        Yes
>>> - Have you tried tried a test case that is not time dependent?
>>      I only tried a scalar case which is time dependent and it worked well.
> Huh? Isn't dgdiffusion.cc a stationary problem?

> As a first stepI would definitely test a stationary version of your
> problem and see whether the problem is there, too.
>
>>> - At which time step /new iteration is this happening?
>>     This happens in Iteration 2
> Of the newton scheme? In the first time step?
>
> Markus
>
> Hi Markus,
Thanks for the response.
I modified the stationary problem to solve a scalar nonlinear time 
dependent problem (with exact solution) and it worked so well. I only 
encountered this problem when trying to solve a two component time 
dependent problem. The only change now was to select the two components 
together in the local operator, then I encountered this problem.

Thanks.
Kind regards,

-- 
Jared Ouma Okiro,
Institute for Analysis and Numerics,
Otto-von- Guericke Universität,
Universitätsplatz 02, Gebaude 02 / 115
39106 Magdeburg, Germany
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