# Anisotropic thermal conductivity in an insulated stranded coil

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

 April 4, 2011, 05:17 Anisotropic thermal conductivity in an insulated stranded coil #1 Senior Member     Attesz Join Date: Mar 2009 Location: Munich Posts: 364 Rep Power: 10 Hi CFX users, I'm modeling an electromotor inner fluid domain including the heat source solid domains. The main problem is that there are little air gaps between the copper conductors (little circles nearby) and they are insulated by varnish. So towards the conductors the heat transfer coefficient is about the value of the copper, but in the orthogonal directions it is reduced because of the air gaps and the insulation. My first idea is to write to the support to help me how to model the anisotropic thermal conductivity via CCL commands as I read in other topics here. But I'm interested in your other suggestions about the modelling of this problem. Thanks in advance, Attila Last edited by Attesz; April 4, 2011 at 07:47.

 April 4, 2011, 09:46 #2 Senior Member   Edmund Singer P.E. Join Date: Aug 2010 Location: Minneapolis, MN Posts: 512 Rep Power: 14 Contact support. This can be done by modifying the material properties in CEL. The limitation is that the orthotropic material properties must be aligned with either the Global Cartisian Coord System, or Global Cylindrical System, so your body has to be aligned right and be of a geometry allows this limitation.

 April 4, 2011, 10:27 #3 Senior Member     Attesz Join Date: Mar 2009 Location: Munich Posts: 364 Rep Power: 10 Thanks Edmund, fortunately my geometry is aligned with the GCS, I thought that this is necessary. I'm waiting for the support. On the other hand, am I right with the approach of the modelling?

 April 4, 2011, 10:36 #4 Senior Member   Edmund Singer P.E. Join Date: Aug 2010 Location: Minneapolis, MN Posts: 512 Rep Power: 14 No idea. I am not clearly picturing what you are trying to model. If you are just determining an HTC to use as a BC, then I wouldnt think you need to use ortho props at all. On the other hand, if you are trying to model thermal gradients within the solid domain, then perhaps yes.

April 4, 2011, 11:08
#5
Senior Member

Attesz
Join Date: Mar 2009
Location: Munich
Posts: 364
Rep Power: 10
Quote:
 On the other hand, if you are trying to model thermal gradients within the solid domain, then perhaps yes.
Yes, I'm trying to model this. Thanks!

 Tags anisotropic, ccl, conductivity, solid, thermal

 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 val46 OpenFOAM 3 July 20, 2010 08:19 suitup OpenFOAM 0 April 29, 2010 07:20 Saturn CFX 4 January 30, 2007 13:34 Lugdi Siemens 0 January 15, 2007 09:03 GBLiu FLUENT 0 June 8, 2006 21:08

All times are GMT -4. The time now is 08:23.