CFD Online Logo CFD Online URL
Home > Forums > OpenFOAM Running, Solving & CFD

Temperature field stops changing in transient simulation

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

LinkBack Thread Tools Display Modes
Old   November 28, 2012, 01:15
Default Temperature field stops changing in transient simulation
New Member
Jeff Cumpston
Join Date: Oct 2011
Posts: 8
Rep Power: 6
Jeffzda is on a distinguished road
Hi there,

I'm using OpenFOAM with the buoyantPimpleFoam solver to simulate buoyant convective flows that develop by heat transfer to air from the inside walls of an open horizontal cavity. The wall temperature is high, at 723K, and ambient is 300K and the mesh cell size near the walls is about 5mm (see close-up of cavity slice with edges shown). I am currently using a constant transport and constant heat transfer model, though I realise that over these temperature ranges that will have to change eventually. I'm not using a turbulence model at this point.

The 3D geometry of the cavity is shown in the picture called 3d_screenshot.jpg. The geometry of the cavity is shown in silver, and the coloured temperature field is a temperature threshold applied to internal mesh so the extent of the flow can be viewed. As you can hopefully see, the flow has started to develop and part of the flow is leaving the cavity at the top.

This is taken at t = 4; data is recorded every 2 secs. The problem that I am having is that in subsequent timesteps there are no changes in the temperature field. I have verified this by running, for example, "diff 4/T 6/T" and none of the cell data is any different. It's the same for all subsequent timesteps.

The funny thing is that the velocity field continues to change.

The time_4_cavity screenshot shows a slice through the centre of the cavity with temperature contours at t=4. The wallcloseup.jpg file is a close up of the top LH corner seen in time_4_cavity screenshot to give an idea of the mesh size.

I included this because simulations with coarser meshes have presented flows that developed much faster and continued to develop for minutes of simulation time. The only difference has been a more refined mesh near the wall.

I hope someone can help me.


Attached Images
File Type: jpg 3D_screenshot.jpg (13.6 KB, 14 views)
File Type: jpg time_4_cavity.jpg (9.4 KB, 13 views)
File Type: jpg wallcloseup.jpg (23.1 KB, 14 views)

Last edited by Jeffzda; November 28, 2012 at 01:53.
Jeffzda is offline   Reply With Quote

Old   September 25, 2013, 01:19
Senior Member
Srivathsan N
Join Date: Jan 2013
Location: India
Posts: 101
Rep Power: 4
Sherlock_1812 is on a distinguished road
Dear Jeff,

Where you able to find out why? I'm facing a similar problem.

Sherlock_1812 is offline   Reply With Quote


buoyancy, buoyantpimplefoam, cavity flow, openfoam 2.0.1

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
Changing patch temperature directly from the solver (buoyantPimpleFoam) kriztof OpenFOAM Running, Solving & CFD 11 January 23, 2012 18:55
problems after decomposing for running OpenFOAM 5 April 20, 2011 08:44
why is solid temperature same as fluid temperature on flow simulation ? qihongming FloEFD, FloWorks & FloTHERM 0 May 26, 2009 08:57
how to identify transient simulation converged littlelz CFX 5 January 27, 2009 19:13
temperature not changing! lizhihua CD-adapco 0 September 14, 2007 09:29

All times are GMT -4. The time now is 00:48.