# [GAMBIT] Flow in a duct

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

January 3, 2012, 15:56
Flow in a duct
#1
New Member

Join Date: Dec 2011
Posts: 11
Rep Power: 8
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
 Geometry.jpg (21.4 KB, 39 views) bottom wall.jpg (49.8 KB, 31 views)

 January 4, 2012, 02:50 #2 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,257 Rep Power: 34 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

 January 4, 2012, 03:23 Hi Max #3 New Member   Join Date: Dec 2011 Posts: 11 Rep Power: 8 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

 January 4, 2012, 03:28 #4 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,257 Rep Power: 34 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

 January 4, 2012, 03:34 I am Sorry , You were right. #5 New Member   Join Date: Dec 2011 Posts: 11 Rep Power: 8 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.......

 January 4, 2012, 11:15 Hi Max #6 New Member   Join Date: Dec 2011 Posts: 11 Rep Power: 8 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

 January 5, 2012, 03:10 #7 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,257 Rep Power: 34 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

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post yfyap Main CFD Forum 6 November 7, 2012 10:59 kkiitm CFX 0 January 2, 2011 12:11 benbru Siemens 1 September 26, 2007 15:53 Watchapon Main CFD Forum 0 April 7, 2007 07:34 Jane FLUENT 0 June 21, 2004 13:57

All times are GMT -4. The time now is 19:29.