CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM

fluid to solid heattransfer with chtMultiRegionFoam

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   August 10, 2010, 04:48
Default fluid to solid heattransfer with chtMultiRegionFoam
  #1
New Member
 
Join Date: Aug 2010
Posts: 7
Rep Power: 6
schteff is on a distinguished road
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
schteff is offline   Reply With Quote

Old   August 11, 2010, 08:08
Default
  #2
Member
 
Join Date: Nov 2009
Location: Germany
Posts: 96
Rep Power: 7
val46 is on a distinguished road
Hi,

what do you mean by "in the other direction"?
val46 is offline   Reply With Quote

Old   August 11, 2010, 09:07
Default
  #3
New Member
 
Join Date: Aug 2010
Posts: 7
Rep Power: 6
schteff is on a distinguished road
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 is offline   Reply With Quote

Old   August 13, 2010, 05:03
Default
  #4
New Member
 
Join Date: Aug 2010
Posts: 7
Rep Power: 6
schteff is on a distinguished road
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
schteff is offline   Reply With Quote

Old   August 20, 2010, 04:54
Default
  #5
Member
 
Join Date: Nov 2009
Location: Germany
Posts: 96
Rep Power: 7
val46 is on a distinguished road
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.
val46 is offline   Reply With Quote

Old   August 20, 2010, 07:45
Default
  #6
New Member
 
Join Date: Aug 2010
Posts: 7
Rep Power: 6
schteff is on a distinguished road
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!
schteff is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Can CFX do CHT simulations with a solid domain rotating in a stationary fluid domain? acro CFX 8 July 8, 2013 08:11
Theory behind the solid domain rotation in fluid using Bets property Riken CFX 0 October 28, 2009 10:51
Problem Interface Solid Fluid with wall velocity Solver v12 hills1 CFX 2 October 12, 2009 05:36
Terrible Mistake In Fluid Dynamics History Abhi Main CFD Forum 12 July 8, 2002 09:11
CFX4.3 -build analysis form Chie Min CFX 5 July 12, 2001 23:19


All times are GMT -4. The time now is 03:45.