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

Particle pairs are overlapping in MPM model(macroscopic particle model)-ANSYS Fluent?

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 28, 2021, 11:06
Default Particle pairs are overlapping in MPM model(macroscopic particle model)-ANSYS Fluent?
  #1
New Member
 
Abi
Join Date: Nov 2020
Posts: 11
Rep Power: 4
Abeer is on a distinguished road
Hi everyone,
I am modelling the blockage of Particle in an air-filled pipe using Macroscopic particle model MPM. By means of particle-based numerical simulations of gravity-driven flows in vertical pipes and test the material transport by adding a helical texture to the inner-wall of the pipe, however, in the first case without helix structure, the blockage has been achieved due to the collision, but some of particle pairs tend to overlap, and I reserved Warning: 1 particle pairs are overlapping!
In the second case, by adding the helix, the most of my particle are lost out of the domain in short time after running the simulation. Please check the images to get a better image of the problem.
I tried to reduce the coefficient of restitution , in order to induce the loss energy for MPM particle once it hits the wall, and I set a high value for minimum drag force for particle detachment( please correct me if its wrong), but it does not work.
Any help would be greatly appreciated.
Attached Images
File Type: jpg ParticleBlockage.jpg (67.2 KB, 3 views)
File Type: jpg 1.jpg (66.3 KB, 2 views)
File Type: jpg 2.jpg (63.0 KB, 2 views)
Abeer is offline   Reply With Quote

Old   September 7, 2022, 05:26
Default
  #2
New Member
 
Mepal
Join Date: Sep 2022
Posts: 1
Rep Power: 0
Mepal is on a distinguished road
Hello Abeer,

Have you solved a problem with "particle pairs are overlapping!"? I also use the MPM technique and face a problem like yours. I've tried to fix it by changing COR to higher 0.8 or lower 0.8, but the overlapping of particles still occurred.

Your help is greatly appreciated.

Best Regards,
Mapel
Mepal 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
[ANSYS Meshing] overlapping geometry in Contact Regions in ansys fluent tj343 ANSYS Meshing & Geometry 20 April 29, 2020 11:39
Macroscopic particle model (MPM) Karthick FLUENT 1 October 26, 2017 04:58
Ansys Fluent (K-Epsilon) Model gshankarau FLUENT 0 September 27, 2016 07:30
How to combine ANSYS Fluent and Structural analysis? diwakar ANSYS 2 June 18, 2015 13:07
Advanced Turbulence Modeling in Fluent, Realizable k-epsilon Model Jonas Larsson FLUENT 5 March 13, 2000 04:27


All times are GMT -4. The time now is 22:34.