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

Hot spots appearing in volume mesh

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 9, 2017, 22:25
Default Hot spots appearing in volume mesh
  #1
New Member
 
Join Date: May 2017
Posts: 2
Rep Power: 0
starccmuser is on a distinguished road
I am running a simple cylindrical geometry with a high pressure region at the start of the simulation. Part way through the simulation, when the pressure wave has passed through an area of tube (which remains at a relatively steady pressure afterwards) spots of high pressure appear on the tube (see link below). I am using a volume extruded mesh which makes me think it isn't a meshing problem. Any ideas?


https://gyazo.com/9563716eea5b38ae64087523c474b2c1

Last edited by starccmuser; May 25, 2017 at 20:44.
starccmuser is offline   Reply With Quote

Old   May 25, 2017, 17:12
Default
  #2
New Member
 
Wade
Join Date: Jul 2015
Posts: 24
Rep Power: 10
wadeellis is on a distinguished road
I have seen something like that but with temperature before. It may mean that the simulation hasn't converged all the way. So, you might try letting it run for a little while more to see if the pressure comes down. Otherwise, you might change the models you are using.
wadeellis is offline   Reply With Quote

Old   May 25, 2017, 20:45
Default
  #3
New Member
 
Join Date: May 2017
Posts: 2
Rep Power: 0
starccmuser is on a distinguished road
Needed a lower time constant, problem resolved
starccmuser is offline   Reply With Quote

Reply

Tags
hotspots, shock tube, turbulence

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
how to set periodic boundary conditions Ganesh FLUENT 15 November 18, 2020 07:09
[blockMesh] non-orthogonal faces and incorrect orientation? nennbs OpenFOAM Meshing & Mesh Conversion 7 April 17, 2013 06:42
[blockMesh] error message with modeling a cube with a hold at the center hsingtzu OpenFOAM Meshing & Mesh Conversion 2 March 14, 2012 10:56
channelFoam for a 3D pipe AlmostSurelyRob OpenFOAM 3 June 24, 2011 14:06
[blockMesh] BlockMesh FOAM warning gaottino OpenFOAM Meshing & Mesh Conversion 7 July 19, 2010 15:11


All times are GMT -4. The time now is 08:43.