CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > General Forums > Main CFD Forum

Motor air friction loss(windage loss) modelling

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 4, 2014, 22:53
Default Motor air friction loss(windage loss) modelling
  #1
New Member
 
yang
Join Date: Feb 2014
Posts: 12
Rep Power: 10
yida16 is on a distinguished road
Hi Forum,

I am trying to model the air friction on the rotor of a motor. I am using Fluent I tried to use the MRF approach similar to wind turbine simulations (rotating fluid, stationary wall relative to fluid) I also have a stator and a stationary air region outside

I am not using any inlet and outlet just because I am not sure how the air flow axially. So I put walls on the two ends of the stationary air. Now my problem is that I don't really see torque on my rotor. Are my settings correct? Or should I even use the MRF? Because in my case it is actually the rotor that's pushing the air not the reverse as in wind turbines. Or should I add inlet and outlet? I am not sure how to set them, I tried with pressure inlet and pressure outlet with zero pressure on both but that gives me similar result as the wall case.

I have been working on this for a while and must get it done really soon. I appreciate your help!

Thanks,
Attached Images
File Type: jpg cfd.JPG (23.7 KB, 16 views)
yida16 is offline   Reply With Quote

Old   May 6, 2014, 10:50
Default
  #2
New Member
 
yang
Join Date: Feb 2014
Posts: 12
Rep Power: 10
yida16 is on a distinguished road
anyone know the solution to this?
yida16 is offline   Reply With Quote

Reply

Tags
fluent, friction, mrf, torque, windage

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
UDF for modelling heat loss in 2D Shrinand Fluent UDF and Scheme Programming 2 February 29, 2016 06:50
Convective heat loss out of a solar receiver construction Lionel Trébuchon CFX 10 April 6, 2014 21:25
loss calculation in simulation of turbomachines playmaster Main CFD Forum 0 August 21, 2010 06:59
modelling heat generation occourred by friction Ruggero Pellegrin CFX 0 February 11, 2005 07:29
head loss due to friction faisal FLUENT 0 April 23, 2001 05:13


All times are GMT -4. The time now is 10:46.