[FLASH-BUGS] implicit thermal conduction

[Milad Fatenejad]

Hello Elke:

Does everything work as expected if "useHydro" is set to false?

Also, for the case that is broken, can you please send the flash.par file...

Thanks
Milad

On Wed, Nov 7, 2012 at 11:37 AM, Elke Roediger
<eroediger at hs.uni-hamburg.de>wrote:

> Dear FLASH team,
>
> I have a problem with the implicit thermal conduction module in FLASH4.
>
> I set up a simple test problem: 2D simulation box, constant pressure,
> temperature T1 in upper half, temperature T2 in lower half; i.e. a two
> fluids with different temperatures separated by an interface along the
> x-axis. Thermal conduction must work along the vertical direction and erase
> the temperature discontinuity.
>
> I want the hydrodynamic boundary conditions in x-direction to be periodic,
> and "outflow" boundaries in the y-direction. When I do this, the
> temperature at the left and right boundary of the simulation box drops to
> something very small (probably zero), and I get thermal conduction not only
> in the vertical direction, but also on the horizontal direction. When I
> change the x-boundaries to "outflow" it works fine.
>
> I rotated the whole geometry, i.e. interface between the hot and cold is
> along the y-axis, and the periodic boundaries along the y-axis, that works
> fine.
>
> I am aware that the implicit diffusion solver needs some boundary
> conditions too, they are set to "outflow" for all directions.
>
> Can you spot where the problem is?
>
> Best regards,
> Elke Roediger
>
>
>
> -------------------------------
> Dr. Elke Roediger
> eroediger at hs.uni-hamburg.de
> +49 (0)40/42838-8539
>
> Hamburger Sternwarte
> Universitaet Hamburg
> Gojensbergsweg 112
> D-21029 Hamburg
> Germany
>
>
>
>
>
>