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

Particle in a flow!

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 21, 2003, 09:20
Default Particle in a flow!
  #1
varghese
Guest
 
Posts: n/a
Hi all!

I wish to simulate a particle carried by a flow in a tube. Which method in Fluent will be suitable for this problem. Dynamic mesh? Multiple Frame of References? Or any other method?

Thanks in advance.

Greetings Varghese
  Reply With Quote

Old   September 22, 2003, 03:45
Default Re: Particle in a flow!
  #2
thomas
Guest
 
Posts: n/a
Hey, If it is question of a single particle yes the deforming mesh approach is the best. You will easily find this case example in the Fluent library. If it is question of several partcle I would suggest the langragian approach.

Hope this will help. thomas
  Reply With Quote

Old   September 22, 2003, 03:49
Default Re: Particle in a flow!
  #3
varghese
Guest
 
Posts: n/a
It is a single particle. I wish to know how the particle flows with the fluid motion and how its own momentum drives it in different path as fluid stream-lines.

Where do we find the Fluent Library?

Greetings Varghese
  Reply With Quote

Old   September 22, 2003, 06:39
Default Re: Particle in a flow!
  #4
thomas
Guest
 
Posts: n/a
Hey, You can probably find it on the fluent user website, certainly on validations or tutorial for dynamics/deforming mesh. If you cannot find it i would advice you to contact the fluent hotline of your country.

good luck, thomas

  Reply With Quote

Old   September 30, 2003, 02:17
Default Re: Particle in a flow!
  #5
Alamgir
Guest
 
Posts: n/a
You could also have a look over Eulerian Multiphase Mixture flow. It is easy and best for both laminer and turbulence flow in pipe flow. I'm using that for 5 different particle for both steady and unsteady in a turbulent region.

Alamgir
  Reply With Quote

Old   February 25, 2011, 16:32
Default Single particle motion with the flow
  #6
New Member
 
raj
Join Date: Feb 2010
Location: OKlahoma
Posts: 13
Rep Power: 7
sammyraj is on a distinguished road
Quote:
Originally Posted by varghese
;108046
Hi all!

I wish to simulate a particle carried by a flow in a tube. Which method in Fluent will be suitable for this problem. Dynamic mesh? Multiple Frame of References? Or any other method?

Thanks in advance.

Greetings Varghese
Hi Varghese,
I want to simulate single particle motion with the flow in tube.

This post looks old but I hope someone will reply. I am using Fluent 12.0 .

Can I use DPM model to do that or please guide me with best approach to this model.How can I do it with dynamic mesh?

Thank you in advance.
sammyraj is offline   Reply With Quote

Old   February 26, 2011, 08:51
Default
  #7
Senior Member
 
Amir's Avatar
 
Amir
Join Date: May 2009
Location: Montreal, QC
Posts: 739
Blog Entries: 1
Rep Power: 14
Amir is on a distinguished road
Hi,
you can easily do that by DPM. it's not necessary to use dynamic mesh!!!
Amir is offline   Reply With Quote

Old   February 26, 2011, 16:36
Default
  #8
New Member
 
raj
Join Date: Feb 2010
Location: OKlahoma
Posts: 13
Rep Power: 7
sammyraj is on a distinguished road
Thank for reply Amir.

I have a question again.
What should be value of the injection velocity when we try to define injection.???
Should it be same as flow velocity or anything else. As my partcile flows with the flow what velocity should I use for injection. B.C for the flow at the inlet (Continuous phase) is velocity inlet.


Thanks again!
sammyraj is offline   Reply With Quote

Old   February 27, 2011, 11:56
Default
  #9
Senior Member
 
Amir's Avatar
 
Amir
Join Date: May 2009
Location: Montreal, QC
Posts: 739
Blog Entries: 1
Rep Power: 14
Amir is on a distinguished road
Hi raj,
it depends on your case, in realistic ones, fluid contains particles before entering the geometry in such cases you can set inlet flow velocity for injected particles. otherwise for particles with low stokes number, they can accommodate themselves in a relatively short time, here you can also use flow velocity.
if you set particle flow rate equal to 0, every streams contain just one particle otherwise your injection B.C. is the same for all particles in a same stream.
Amir is offline   Reply With Quote

Old   March 11, 2011, 18:51
Default
  #10
New Member
 
raj
Join Date: Feb 2010
Location: OKlahoma
Posts: 13
Rep Power: 7
sammyraj is on a distinguished road
Hello Amir,

Thank you again. I was able to run and track the particle.

I am trying to get the forces( mainly Drag)acting on the each particle. How can I get it from Fluent.

How can I define shape factor for cylinder with large aspect ratio.?
sammyraj is offline   Reply With Quote

Old   March 12, 2011, 11:30
Default
  #11
Senior Member
 
Amir's Avatar
 
Amir
Join Date: May 2009
Location: Montreal, QC
Posts: 739
Blog Entries: 1
Rep Power: 14
Amir is on a distinguished road
Hi raj,
you can define a shape factor for your particles in:
define->models->discrete phase->tracking tab->drag parameters->non-spherical...
for finding drag force I don't know any straight forward procedure but you can use a simple UDF for that. if you find easier way, let me know.

regards,

Amir
Amir 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
Transient analysis of particle flow with Fluid-Structure Interaction (FSI) Julian K. STAR-CCM+ 2 October 11, 2011 10:19
Transient analysis of particle flow with Fluid-Structure Interaction (FSI) Julian K. CFX 2 September 15, 2011 15:30
Transient analysis of particle flow with Fluid-Structure Interaction (FSI) Julian K. FLUENT 0 September 14, 2011 15:40
Particle Injection Mass Flow Rate and Position leonozx FLUENT 2 April 29, 2011 09:19
particle tracking in unsteady flow peterchen FLUENT 1 July 22, 2010 22:18


All times are GMT -4. The time now is 12:57.