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-   -   fluid to solid heattransfer with chtMultiRegionFoam (http://www.cfd-online.com/Forums/openfoam/79018-fluid-solid-heattransfer-chtmultiregionfoam.html)

schteff August 10, 2010 04:48

fluid to solid heattransfer with chtMultiRegionFoam
 
Hi,

is it possible to make the heattransfer from a fluid- to a solidregion with the chtMultiRegionFoam solver. My case runs good when I have a "solidheater" but it doesnīt work in the other direction!

Has anybody an idea?

thank you!

schteff

val46 August 11, 2010 08:08

Hi,

what do you mean by "in the other direction"?

schteff August 11, 2010 09:07

Oh sorry,

I have hot air in one region and I want to simulate the heattransfer through two solid regions into a water region.

My proplem is, that the solid regions hold the temperature of the beginning.

Do I have to modify the boundary settings?

I hope you understand the problem.

schteff

schteff August 13, 2010 05:03

Hi,

to avoid other misstakes in my mesh, I tried to solve my problem in the multiRegionHeater tutorial.

My question is now:

Is it possibleto heat up the bottom-air-region and simulate the heattransfer through the solid-regions into the topair-region?
(without heating the heater-region)

I tried it, but the solid-region hold theit temperatures! (1000s simulated Time)

thanks


schteff

val46 August 20, 2010 04:54

Hi,

Quote:

Is it possible to heat up the bottom-air-region and simulate the heattransfer through the solid-regions into the topair-region?
(without heating the heater-region)
Yes, it is possible. I just tried it and it worked. (I did it the other way around but i think this makes no difference.)
I heated the solids (300K) with the topair fluid (600K at minX). After 1000s i got a max Temperature of the bottomAir domain of 309 K

Not sure if these values are totally physically correct (especially because the mesh is very coarse). But the solution tends in the right direction :)

Regards,
Toni

EDIT: Oh, by the way, I tried it with chtMultiRegionSimpleFoam. But I think it shouldn't make any difference.

schteff August 20, 2010 07:45

thank you,

yes it works :)!

My thermophysical properties were the problem!!!

Donīt know why! because I just copied from the tutorial...

with sutherlandTransport it works a bit better!


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