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

Natural convection is not converging

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   October 13, 2023, 04:58
Lightbulb Natural convection is not converging
  #1
New Member
 
Bohn
Join Date: Oct 2023
Posts: 1
Rep Power: 0
Bohnie is on a distinguished road
Hi all,

for my master thesis i need to simulate a heatingsystem for a church. Therefore i simplified the construction to a big room with one block of heat source in the middle. There is a small heat flux loose through the walls an i already added the model S2S-Radiation (gray thermal radiation).

The velocity vectors make sense to me, but the block doesnt heat up the surrounding space.

I am using the version STAR-CCM+ 2022.1 Build 17.02.007.

The phsyics models are:

All y+ wall treatment
gas
gradients
gravity
gray thermal radiation
ideal gas
K-Omega Turbulence
Radiation (S2S)
RANS
Segregated Flow
Segregated Fluid temperature
Solution interpolation
SST (Menter) K-Omega
Steady
3D
Turbulent
View factors calculator
Wall distance

Any ideas what i could do?

Thank you in advance!
Attached Images
File Type: jpg 001.jpg (123.3 KB, 14 views)
Bohnie is offline   Reply With Quote

Old   October 31, 2023, 01:45
Smile
  #2
New Member
 
songning yu
Join Date: Oct 2023
Posts: 1
Rep Power: 0
SnongNIng is on a distinguished road
what are the boundary conditions? maybe the flow is because of the boundary conditions?
PS:I was once faced with a similar problem, as the coolant can't bring away the heat of batteries, then I used impress/weak contact to create interface between them and the problem is solved.
SnongNIng is offline   Reply With Quote

Reply

Tags
heat source, heating system, natural convection, radiation convection

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
Flow is not converging in natural convection problem of boussinesq model for air rahulsharma FLUENT 4 December 2, 2020 22:07
Transient natural convection, and immediately forced convection intied FLUENT 2 February 7, 2019 19:38
Natural convection not converging ThatGuy STAR-CCM+ 0 May 2, 2016 06:20
Thermophysical properties for natural convection Ciefdi OpenFOAM Running, Solving & CFD 0 November 7, 2013 12:44
natural convection problem with radiation jorien CFX 0 October 14, 2011 10:26


All times are GMT -4. The time now is 06:21.