CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > ANSYS Meshing & Geometry

[GAMBIT] Flow in a duct

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 3, 2012, 15:56
Default Flow in a duct
  #1
New Member
 
Join Date: Dec 2011
Posts: 11
Rep Power: 5
saksham.pachar is on a distinguished road
I have a triangular duct ....

In that i have a fin..........

now I want that the fin should conduct heat from outer wall to fluid flowing through the duct...

so i have two volumes...........one is of duct and other is of fin.

should i use the retain option while subtracting fin from the duct volume.

as when i simply subtract.... the heat transfer reduces..... because there becomes a hole in the bottom wall which is at 400 k

I will mail the files, if any one, can give suggestions on how to do it....
Attached Images
File Type: jpg Geometry.jpg (21.4 KB, 32 views)
File Type: jpg bottom wall.jpg (49.8 KB, 25 views)
saksham.pachar is offline   Reply With Quote

Old   January 4, 2012, 02:50
Default
  #2
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,973
Rep Power: 30
-mAx- will become famous soon enough
I have no experience with solid conduction, but if you want to compute it, you need the 2 volumes.
So the retain option should be choosen.
Define the fluil domain as fluid and the fin volume as solid
http://my.fit.edu/itresources/manual...zone_cont_type
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is online now   Reply With Quote

Old   January 4, 2012, 03:23
Default Hi Max
  #3
New Member
 
Join Date: Dec 2011
Posts: 11
Rep Power: 5
saksham.pachar is on a distinguished road
Dear Max, Its a Convection Problem
When I retain the volume and put it as solid in continuum , then I get a floating point error in fluent.
I wish to send the files to you
Saksham.pachar@gmail.com
saksham.pachar is offline   Reply With Quote

Old   January 4, 2012, 03:28
Default
  #4
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,973
Rep Power: 30
-mAx- will become famous soon enough
if you don t need solid conduction, then don't retain the fin volume.
You will have a hole in place of the fin.
Then just set the termal conditions for the fin's walls.
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is online now   Reply With Quote

Old   January 4, 2012, 03:34
Default I am Sorry , You were right.
  #5
New Member
 
Join Date: Dec 2011
Posts: 11
Rep Power: 5
saksham.pachar is on a distinguished road
Its a Conduction + Convection Problem.
now I will try with retain option...
I am sure.....this time...some thing will come out....
I was a lot confused in this matter.....and you solved it Instantaneously...
Hats off to you........................
You are my Hero.......
saksham.pachar is offline   Reply With Quote

Old   January 4, 2012, 11:15
Default Hi Max
  #6
New Member
 
Join Date: Dec 2011
Posts: 11
Rep Power: 5
saksham.pachar is on a distinguished road
Hi Friend.

I have made two volumes now...

Now I split volumes instead of subtract.....

I think that option will work ....

Max could you possibly check... whether I am doing correctly or not
saksham.pachar is offline   Reply With Quote

Old   January 5, 2012, 03:10
Default
  #7
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,973
Rep Power: 30
-mAx- will become famous soon enough
it depends on your both geometries.
If first geometry is already the fluid domain, and the second the solid domain, then you don't need to do anything (perhaps disconnecting both volumes because of solid conduction, but as I sais I am not experienced in this area).
Did you already solved convection (only fluid domain)?
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is online now   Reply With Quote

Reply

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
on fully developed duct flow yfyap Main CFD Forum 6 November 7, 2012 10:59
convergent duct water flow kkiitm CFX 0 January 2, 2011 12:11
Duct Flow Analysis benbru CD-adapco 1 September 26, 2007 15:53
Turbulence flow in a rectangular duct Watchapon Main CFD Forum 0 April 7, 2007 07:34
Question about flow in ducted fan in another duct Jane FLUENT 0 June 21, 2004 13:57


All times are GMT -4. The time now is 03:35.