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

Foil Bearing Simulation

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 25, 2011, 02:34
Red face Foil Bearing Simulation
  #1
New Member
 
Balaji Sankar
Join Date: Nov 2011
Posts: 19
Rep Power: 5
Bajji is on a distinguished road
Hi all,

I have to simulate the orbit(path taken by the centre ) of the shaft in a foil bearing with air as the lubricant instead of oil. The foil bearing is same as the Journal bearing except that the boundary is deformable and not rigid like a journal bearing. There is a pressure build up because shaft is rotating and dragging the air around it into a narrow channel.(See image) I obviously need to solve the

a) Pressure build up in the fluid
b) Deformation of the boundary due to the built up pressure.
c) Motion of the shaft centre inside the bearing in response to the pressure and its own rotation.

Hope I am clear.

1) Has anyone solved this in OpenFOAM before.?
2) what are the solvers I should read up on?

Any pointers to start or links to similar solved problems will be very usefull.
Attached Images
File Type: png FB.png (15.3 KB, 44 views)
Bajji is offline   Reply With Quote

Old   November 25, 2011, 04:32
Default
  #2
Senior Member
 
Elvis
Join Date: Mar 2009
Location: Sindelfingen, Germany
Posts: 577
Blog Entries: 5
Rep Power: 13
elvis is on a distinguished road
Hi,
maybe http://powerlab.fsb.hr/ped/kturbo/Op...dicPhD2005.pdf
Doctorate Thesis: Advanced Modelling of Elastohydrodynamic Lubrication by
Petra Brajdic-Mitidieri
http://powerlab.fsb.hr/ped/kturbo/Op...riImperial.pdf

is something for you
elvis is offline   Reply With Quote

Old   November 28, 2011, 04:20
Smile
  #3
New Member
 
Balaji Sankar
Join Date: Nov 2011
Posts: 19
Rep Power: 5
Bajji is on a distinguished road
Thanks Elvis.

I will see what Brajdic has done in his Thesis.
Bajji is offline   Reply With Quote

Old   May 1, 2013, 09:20
Default Help
  #4
New Member
 
Fabian
Join Date: May 2013
Posts: 3
Rep Power: 4
fpierart is on a distinguished road
Quote:
Originally Posted by Bajji View Post
Thanks Elvis.

I will see what Brajdic has done in his Thesis.
Bajji, could you finally model the bearing?, I need to do the same and if you can help me, with something like with solver did you use (rhoSimplecFoam, rhoCentral foam) or more datails I will be very helpull.
fpierart is offline   Reply With Quote

Old   May 1, 2013, 23:47
Default Couldn't do it in openFOAM.
  #5
New Member
 
Balaji Sankar
Join Date: Nov 2011
Posts: 19
Rep Power: 5
Bajji is on a distinguished road
Hi fpierart,

I did finally model the bearing with shaft motion inside it.

But I gave up on openFOAM and wrote the Reynold's equation solver (I tried FDM and FVM) in C++ from scratch. It worked. I got pretty good agreements between simulated and published pressure distributions at mid plane.

I want to make clear that it was not a problem with openFOAM. I simply couldn't get that monster working.

Have great time,
Balaji Sankar.
Bajji is offline   Reply With Quote

Reply

Tags
bearings, fsi, openfoam, shaft dynamics

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
Solar Radiation in OpenFOAM plainstyle OpenFOAM Running, Solving & CFD 15 July 8, 2014 04:43
problem is modeling and simulation of an air foil alnabhani CFX 4 December 2, 2010 14:24
GUI crash and simulation engine still running RPJones FLOW-3D 2 November 9, 2010 09:18
velocity profile export from a simulation onto another sudhirlv STAR-CCM+ 1 September 12, 2010 18:57
strange simulation error Ralf Schmidt FLUENT 2 May 4, 2007 13:02


All times are GMT -4. The time now is 03:12.