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

Pure conduction with chtMultiRegionSimpleFoam

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   October 3, 2019, 09:52
Default Pure conduction with chtMultiRegionSimpleFoam
  #1
New Member
 
Bourne
Join Date: Oct 2019
Posts: 2
Rep Power: 0
Bourne OpenFoam is on a distinguished road
Dear OpenFoamers,

I have a question for which I have not yet been able to find and answser.

Context:
I would like to simulate pure conduction throught 2 solids. For training purposes I have set the same thermal properties for both materials.

Unfortunatly I obtain an error in the results at the boundary layer between the two materials. I was expecting a linear temperature gradient, however I obtain a vertical drop in the temperature at the boundary between the 2 materials --> See picture.



Does anyone have a idea how to overcome this error? I believe it must have something to do with the boundary conditions.

My boundary condition for the interfaces are as follows:

"BigSolid_to_.*"
{
type compressible::turbulentTemperatureCoupledBaffleMix ed;
Tnbr T;
kappaMethod solidThermo;
kappaName none;
value uniform 300;
}

Many Thanks,

George
Attached Images
File Type: jpg 03.jpg (48.0 KB, 14 views)
Bourne OpenFoam is offline   Reply With Quote

Old   October 4, 2019, 05:14
Default
  #2
New Member
 
Join Date: May 2013
Posts: 22
Rep Power: 8
carye is on a distinguished road
I think this is not an error of OF, but related to the post-processing.

to my knowledge, the plot over line filter in paraview is point based, so it will interpolate the values from the cell data to plot.
I think the jump comes from the interpolation.

you can set the resolution of the line in paraview to the size of the mesh direction, in your case, the x direction.
And read in not only the internalmesh but also the interface between the two regions, such as the interface of ..._to_...
then you should get a smooth plot.

I don't know whether paraview can plot the cell data or not ( I did not find the approach... ),
but you can also apply the cell centers filter to the domain and export the cell centers and data, use excel to process the data.

hope this helps you.
and please figure out if I was wrong.
carye is offline   Reply With Quote

Old   October 29, 2019, 04:10
Default
  #3
New Member
 
Bourne
Join Date: Oct 2019
Posts: 2
Rep Power: 0
Bourne OpenFoam is on a distinguished road
Thanks for your reply, I took me a while but I found the solution.

I needed to set the inner wall as type calculated and then it worked

Hvae a good day!
Bourne OpenFoam is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pure Solid Thermal Conduction by OF2.3.1 Asghari_M OpenFOAM Running, Solving & CFD 0 April 5, 2015 11:10
FLUENT: Pure Conduction??? dinhanh FLUENT 7 March 2, 2015 14:32
Pure conduction problem with different diffusivities diego_angeli OpenFOAM Running, Solving & CFD 2 October 8, 2008 07:53
pure conduction sudhir FLUENT 4 April 17, 2008 03:44
Conduction in rotating mesh Niels Linnemann FLUENT 0 May 4, 2007 09:13


All times are GMT -4. The time now is 16:54.