CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT > Fluent Multiphase

Momentum source

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 23, 2018, 01:21
Default Momentum source
  #1
New Member
 
Join Date: Mar 2018
Posts: 4
Rep Power: 8
Goldenpheonix is on a distinguished road
Is there any way to give angular momentum source term in fluent? If not, how can one model rotation of mixer and the thrust produced by it?
Goldenpheonix is offline   Reply With Quote

Old   March 31, 2018, 22:51
Post momemtum source
  #2
New Member
 
Lee
Join Date: Feb 2018
Posts: 12
Rep Power: 8
Lee 小亢 is on a distinguished road
Hi~
I met the same question with you and I created a cylinder zone as the mixer then added the momentum source term in this zone but I don't know how to calculate the value of the term. Do you know it?
Lee 小亢 is offline   Reply With Quote

Old   April 4, 2018, 00:55
Default
  #3
New Member
 
Join Date: Mar 2018
Posts: 4
Rep Power: 8
Goldenpheonix is on a distinguished road
Hi Lee,
Yes. The momentum source term (N/m3) can be calculated as the total thrust (N) produced by the mixer divided by the volume of cylindrical source (m3). However, I am sure if it is correct way to model mixer as mixer will also produce torque which we need to consider. I assumed only thrust to model our mixer as it is an axial mixer. Still I need feedback from other CFD experts on this forum to enlighten me more on this topic.

Manish
Goldenpheonix is offline   Reply With Quote

Old   July 13, 2018, 19:22
Default
  #4
Dri
New Member
 
Adriana
Join Date: Oct 2012
Location: Canada
Posts: 7
Rep Power: 13
Dri is on a distinguished road
Quote:
Originally Posted by Goldenpheonix View Post
Is there any way to give angular momentum source term in fluent? If not, how can one model rotation of mixer and the thrust produced by it?
Hi there,



I've have experience with stirred tanks. From my experience, it depends on how complex you want your simulation to be. For 2D simulations, you could add fixed velocities that simulate the propeller via UDF. However, you need to get the velocities from experimental measurements. An example of this approach is tutorial 21 (using the Eulerian Multiphase Model for granular flow). However, you cannot get the thrust (I think this would be the torque) in 2D.



The other alternative is a 3D simulation of your propeller. In this case, you can set a MRF model (Steady state) or SM (transient state) and get the torque. Once again, it depends on what you problem description.
Dri is offline   Reply With Quote

Reply

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
[swak4Foam] difficulties installing swak4foam newbie29 OpenFOAM Community Contributions 120 October 21, 2022 05:01
[swak4Foam] swak4foam for OpenFOAM 4.0 mnikku OpenFOAM Community Contributions 80 May 17, 2022 09:06
[swak4Foam] funkyDoCalc with OF2.3 massflow NiFl OpenFOAM Community Contributions 14 November 25, 2020 04:30
[Other] Adding solvers from DensityBasedTurbo to foam-extend 3.0 Seroga OpenFOAM Community Contributions 9 June 12, 2015 18:18
[swak4Foam] build problem swak4Foam OF 2.2.0 mcathela OpenFOAM Community Contributions 14 April 23, 2013 14:59


All times are GMT -4. The time now is 14:30.