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

Acoustic field in a centrifugal fan

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 9, 2010, 18:17
Default Acoustic field in a centrifugal fan
  #1
Member
 
Mohammad.R.Shetab
Join Date: Jul 2010
Posts: 49
Rep Power: 6
mrshb4 is on a distinguished road
Hi everyone
I want to work on the noise prediction of a centrifugal fan with radios about 30cm.(745 rpm)
The question is because I should predict pressure fluctuations, should I solve the flow compressible or incompressible?!!!
And what solvers should I use?!!

thanks
Mohammadreza
mrshb4 is offline   Reply With Quote

Old   December 10, 2010, 02:59
Default
  #2
Member
 
Tobias Holzinger
Join Date: Mar 2009
Location: Munich, Germany
Posts: 46
Rep Power: 8
woody is on a distinguished road
Hi Mohammadreza,

sounds quite incompressible, so I would recommend icofoam. I only do compressible simulations with rhoPisoFoam...

Depends on what you want to simulate...

Maybe you should first define your goals before you select the solver...
__________________
Tobias Holzinger

Chair of Thermodynamics, TU München
woody is offline   Reply With Quote

Old   December 10, 2010, 06:19
Default even for acoustic field?!
  #3
Member
 
Mohammad.R.Shetab
Join Date: Jul 2010
Posts: 49
Rep Power: 6
mrshb4 is on a distinguished road
Dear Tobias
Thank you for your answer. I know that the flow is incompressible and it should be solved with solvers MRFSimpleFoam(for steady) and turbDyMFoam(for unsteady). But my question is acoustic field is something different from flow field. I mean noise generation and propagation is something based on pressure fluctuaion and relatively density fluctuation. In this kind of problems, should I still solve the flow incompressible?!!

Thanks
Mohammadreza
mrshb4 is offline   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
Moving mesh Niklas Wikstrom (Wikstrom) OpenFOAM Running, Solving & CFD 122 June 15, 2014 06:20
Modeling of centrifugal fan in CFD Simon Williams Main CFD Forum 3 February 20, 2009 16:00
How to model flow of centrifugal fan? Peter Main CFD Forum 0 April 2, 2008 06:07
Problem with rhoSimpleFoam matteo_gautero OpenFOAM Running, Solving & CFD 0 February 28, 2008 07:51
centrifugal pump and centrifugal fan Mangesh Main CFD Forum 3 January 3, 2006 12:21


All times are GMT -4. The time now is 07:53.