CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > Siemens > STAR-CCM+

Problems in adding interfaces to an overset mesh.

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 17, 2020, 10:00
Default Problems in adding interfaces to an overset mesh.
  #1
New Member
 
William Zanin
Join Date: Feb 2019
Posts: 3
Rep Power: 7
william.z is on a distinguished road
Hi guys,

Just an operational question about Star ccm+. I'm trying to perform an unsteady simulation of a simple heat exchange case of a rotating object, using the overset mesh.
The case is very simple:
1) a background air region shaped as a simple cube.
2) an overset region, also shaped as a cube (way smaller than the background region)
3) the effective shape of the object that rotates that is an even smaller cube.

I successfully made the attempt in performing an unsteady simulation with the cube in motion. Just took the background region and the overset region (the second one subtracted by the cube shape and put in motion).

I'm now having real trouble in adding the heat exchange. I want just one of the faces of the cube to have a fixed heat flux, that will transfer heat to both the cube it self (solid) and the sorrounded area.

For this porpouse I thought I needed to add the solid cube region (also to be put in motion) and then create interfaces between the cube and the cube shape subtracted to the overset mesh. One interface rappresenting one face of the cube with a fixed heat flux and the other 5 faces rappresented by a conjugated-heat transfer interfaces.

The problem is that now that, when I try to add interfaces, I'm no more able to mesh. Everything I try says to me either that "some volumes are not included" or that "regions are self intersected".

Hope it's not too much of a basic question, but i didn't find anything on literature.
william.z is offline   Reply With Quote

Old   April 20, 2020, 06:02
Default
  #2
New Member
 
Join Date: Oct 2018
Posts: 3
Rep Power: 8
JB1989 is on a distinguished road
When you want to use overset mesh you should not subtract the cube from the background. Simply create two meshes, without subracting anything, then mark both boundaries (of the background and overset) and select create interface -> overset mesh.
JB1989 is offline   Reply With Quote

Old   April 21, 2020, 10:08
Default
  #3
New Member
 
William Zanin
Join Date: Feb 2019
Posts: 3
Rep Power: 7
william.z is on a distinguished road
totally agree with you, the only reason why i didn't do that is because if I don't perform a subtract I don't have common surfaces between the two regions (air and solid) through which specify the heat passage. Or am I losing something?
william.z is offline   Reply With Quote

Reply

Tags
heat exchange, interface, motion, overset mesh, starccm+

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
[Salome] Problems for creating mesh in salome to OPENFOAM bye bye my blue OpenFOAM Meshing & Mesh Conversion 8 December 5, 2023 01:57
sliding mesh problem in CFX Saima CFX 46 September 11, 2021 08:38
[Commercial meshers] Problems with ANSYS mesh conversion tdog OpenFOAM Meshing & Mesh Conversion 1 March 31, 2016 18:36
Icemcfd 11: Loss of mesh from surface mesh option? Joe CFX 2 March 26, 2007 19:10
How to control Minximum mesh space? hung FLUENT 7 April 18, 2005 10:38


All times are GMT -4. The time now is 13:24.