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Dear conf86,<br>
this is a mailing list for technical specific questions regarding
the development and use of<br>
the dune-pdelab module. Vague questions in the style of 'my code
ain't working -- help me'<br>
are out of place here. Please go ask your thesis supervisor about
stuff like that.<br>
To be quite honest, we are even less inclined to help you because
you consistently refuse<br>
to give your full name and affiliation. In this community this is
interpreted as a sign of<br>
disrespect. I doubt you will get any more answers here until you
share your identity.<br>
Regards,<br>
Oliver<br>
<br>
<div class="moz-cite-prefix">On 21.10.2015 11:45, <a class="moz-txt-link-abbreviated" href="mailto:conf86@web.de">conf86@web.de</a>
wrote:<br>
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cite="mid:trinity-e25b63b2-7784-4ca7-a22c-aff744509fd0-1445420714725@3capp-webde-bs39"
type="cite">
<pre wrap="">I have the following problem:
A sperical body has a radially dependent initial temperature u_0 from a shock wave as given in u_0.png. There is no further heat source and the body simply cools down.
So I have a*\partial_t u - \Delta u = 0 and Neumann boundary conditions for the outflow (black body radiation).
However as seen in u_t.png the solution looks very unphysical, because the heat should not distribute on the surface in this fashion.
I did a model calculation with a constant initial temperature beforehand and it looked ok, so I really don't know what was going wrong here.
However the gradient of the initial condition is rather high, could this be the reason?
I double-checked possible sign errors and similar, but I couldn't find any.
Do you have any idea what could be reason for this or where to look at?
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<pre wrap="">_______________________________________________
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