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

Heat transfer

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 11, 2019, 05:00
Default Heat transfer
  #1
Senior Member
 
Pedro Oliveira
Join Date: Feb 2018
Location: Portugal
Posts: 109
Rep Power: 6
oliveira1820 is on a distinguished road
I am modelling the water inside a domain, heated by different energy sources.

I have designed geometric subdomains which will be used as reference to define energy sources inside those subdomains.

The problem is that, in CFX-Pre, the software assumes that there is a wall between the water domain and the energy sources subdmains, thus, resulting in the separation of the water inside the subdomains and the remaining domain.

How can I define the energy sources geometrically and tell the software that water occupies equally all the domain?
oliveira1820 is offline   Reply With Quote

Old   February 11, 2019, 06:01
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,230
Rep Power: 135
ghorrocks is just really niceghorrocks is just really niceghorrocks is just really niceghorrocks is just really nice
When you define the domain select both the main fluid region and the heat source regions. Then define a subdomain with just the heat source regions in it.
__________________
Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.
ghorrocks is offline   Reply With Quote

Old   February 12, 2019, 04:05
Default
  #3
Senior Member
 
Pedro Oliveira
Join Date: Feb 2018
Location: Portugal
Posts: 109
Rep Power: 6
oliveira1820 is on a distinguished road
I did exactly that but the software automatically defines a wall between the energy source domain and the remaining domain. (and I canīt delete it)

I want that water fills the entire domain equally, even on the subdomains location. The subdmains should only work as a geometric reference to the enerngy sources.
oliveira1820 is offline   Reply With Quote

Old   February 12, 2019, 11:33
Default
  #4
Senior Member
 
Join Date: Jul 2011
Location: Berlin, Germany
Posts: 173
Rep Power: 13
monkey1 is on a distinguished road
What do you mean with "geometric subdomain"?
Two separate meshes?
If yes then you will have to define interfaces between the meshes and there you can select, that they should be "open"
If you have 2 (or more) meshes glued together without interfaces, then CFX-Pre will automatically set the contact surfaces as "wall"...
monkey1 is offline   Reply With Quote

Old   February 12, 2019, 14:28
Default
  #5
Senior Member
 
Pedro Oliveira
Join Date: Feb 2018
Location: Portugal
Posts: 109
Rep Power: 6
oliveira1820 is on a distinguished road
I mean subdomais respective to the geometric cylinders Iīve designed, that correspond to differnet meshes yeah.

So, defining the interface as opening it is the same as if there was no interface at all, for heat, mass and momentum transfer?
oliveira1820 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
Heat transfer coefficient in regenerator gartz89 FLUENT 0 May 26, 2018 02:23
Flow around heatsink with heat transfer S Mughal FLUENT 0 April 13, 2018 14:06
Error finding variable "THERMX" sunilpatil CFX 8 April 26, 2013 08:00
Question about heat transfer simulation Anna Tian Main CFD Forum 0 January 25, 2013 19:53
Convective Heat Transfer - Heat Exchanger Mark CFX 6 November 15, 2004 16:55


All times are GMT -4. The time now is 03:28.