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

Injecting Particles

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 12, 2010, 10:53
Unhappy Injecting Particles
  #1
New Member
 
Pejman Sho
Join Date: Jul 2009
Posts: 12
Rep Power: 8
pejmanpark is on a distinguished road
Dear all,

I want to solve a problem in Fluent regarding injection of droplets from a surface. In my injection surface I have about 100 cells and it seems that when I start simulation it only inject 100 particles (equal to number of surface cell).
Does anyone know how can I increase the number of particles?
I think there should be something in Define>Injections> set> File
But I don't know how should I write the File for injection.

I would be glad if anyone can solve the problem.

Cheers,
Pejman
pejmanpark is offline   Reply With Quote

Old   November 12, 2010, 15:32
Thumbs up This is a sample of injection file.
  #2
New Member
 
limin
Join Date: May 2009
Posts: 21
Rep Power: 8
zhang.limin is on a distinguished road
x y z u v w diameter temperature mass-flow )
( ( -1.7546E-02 -4.0000E-03 -1.7546E-02 0.0000E+00 0.0000E+00 0.0000E+00 1.0000E-06 2.0000E+01 0.0000E+00 ) )
( ( 0.0000E+00 -4.0000E-03 -1.7546E-02 0.0000E+00 0.0000E+00 0.0000E+00 1.0000E-06 2.0000E+01 0.0000E+00 ) )
( ( 1.7546E-02 -4.0000E-03 -1.7546E-02 0.0000E+00 0.0000E+00 0.0000E+00 1.0000E-06 2.0000E+01 0.0000E+00 ) )

You can save this file as TXT or inj file.
It should be worked
zhang.limin is offline   Reply With Quote

Old   November 18, 2010, 06:16
Default
  #3
New Member
 
Pejman Sho
Join Date: Jul 2009
Posts: 12
Rep Power: 8
pejmanpark is on a distinguished road
Dear Zhang,

Thanks for your help. As I got the impression it will produce an injection point. Do u have any idea how can I make the same file for surface injection.
My surface is something like this:
x=1, 4<y<5, z=0

Thanks

Quote:
Originally Posted by zhang.limin View Post
x y z u v w diameter temperature mass-flow )
( ( -1.7546E-02 -4.0000E-03 -1.7546E-02 0.0000E+00 0.0000E+00 0.0000E+00 1.0000E-06 2.0000E+01 0.0000E+00 ) )
( ( 0.0000E+00 -4.0000E-03 -1.7546E-02 0.0000E+00 0.0000E+00 0.0000E+00 1.0000E-06 2.0000E+01 0.0000E+00 ) )
( ( 1.7546E-02 -4.0000E-03 -1.7546E-02 0.0000E+00 0.0000E+00 0.0000E+00 1.0000E-06 2.0000E+01 0.0000E+00 ) )

You can save this file as TXT or inj file.
It should be worked
pejmanpark is offline   Reply With Quote

Old   November 18, 2010, 08:54
Default each line is one particle,
  #4
New Member
 
limin
Join Date: May 2009
Posts: 21
Rep Power: 8
zhang.limin is on a distinguished road
each line is on particle, that information contains x y z position, uvw velocity, density,. diameter, ......
you can edit how many particles you want, just organize them(differnt position) together line by line.
zhang.limin is offline   Reply With Quote

Reply

Tags
cfd, droplets, injections, particles, two phase

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
Particles are not hitting the wall CedricVH OpenFOAM Bugs 21 June 2, 2015 04:33
Particles do not hit the wall CedricVH OpenFOAM 0 April 15, 2010 08:21
particles model ati_ros61 FLOW-3D 3 December 6, 2009 17:03
angular periodicity for injecting particles zenith FLUENT 2 June 19, 2007 01:23
how to determine the number of particles injected. welch FLUENT 1 November 1, 2005 06:11


All times are GMT -4. The time now is 09:21.