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

How do I set up initial particles condition?

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

Like Tree2Likes
  • 1 Post By `e`
  • 1 Post By `e`

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 16, 2015, 03:36
Default How do I set up initial particles condition?
  #1
New Member
 
sohn donh kyung
Join Date: Mar 2015
Posts: 3
Rep Power: 11
sohn is on a distinguished road
Hello.

I wanna simulate a fluidized bed reactor with initial particle condition by using fluent DPM.

but, I am so confused about making initial information file for particles.

I made file like below and set up by injection

---------file start---------------------------------------------------------------
((x y z u v w temperature diameter mass-flow)name)

((-0.0060 -0.0735 0.0015 0.0 0.0 0.0 300.0 0.0025 0.0) injection-0:0)

((-0.0030 -0.0735 0.0015 0.0 0.0 0.0 300.0 0.0025 0.0) injection-0:1)

....
---------file end----------------------------------------------------------------

but, I only can see below massage

---------------------------------------------------------------------------------
ERROR reading particle 0 for injection: injection-0.

Particle streams from injection-0:
STREAM ...........................INITIAL VALUES...........................
NO TYP (X) (Y) (Z) (U) (V) (W) (T) (DIAM) (MFLOW)

...
---------------------------------------------------------------------------------

I don't know what is the problem. T T

Please anybody help me.

thank you for your help!!

sohn
sohn is offline   Reply With Quote

Old   March 16, 2015, 04:55
Default
  #2
`e`
Senior Member
 
Join Date: Mar 2015
Posts: 892
Rep Power: 18
`e` is on a distinguished road
Is the line "((x y z u v w temperature diameter mass-flow)name)" literally in the injection file? Remove this line.
sohn likes this.
`e` is offline   Reply With Quote

Old   March 16, 2015, 08:31
Default
  #3
New Member
 
sohn donh kyung
Join Date: Mar 2015
Posts: 3
Rep Power: 11
sohn is on a distinguished road
Thank you, e.

The error massage disappears due to your recommendation.

But, I have a new problem.

I can't find my initial particle in my domain through the calculation!!

I want that my particles just stay at given position.

What can I do for that?

Regards

sohn
sohn is offline   Reply With Quote

Old   March 16, 2015, 16:06
Default
  #4
`e`
Senior Member
 
Join Date: Mar 2015
Posts: 892
Rep Power: 18
`e` is on a distinguished road
If you wanted your particles to remain stationary (why?) you could set the drag, gravity and other particle forces to zero. Then your particle would have zero acceleration and remain still.
sohn likes this.
`e` is offline   Reply With Quote

Old   March 17, 2015, 00:12
Default
  #5
New Member
 
sohn donh kyung
Join Date: Mar 2015
Posts: 3
Rep Power: 11
sohn is on a distinguished road
Thank you for kind answer, e

I mean..

I can't see any particles in my domain.

It seems that the initial particles don't evolve in my computation.

I still see below massage while the 'ERROR' word disappear.

----------------------------------------------------------------------------
Particle streams from injection-0:
STREAM ...........................INITIAL VALUES...........................
NO TYP (X) (Y) (Z) (U) (V) (W) (T) (DIAM) (MFLOW)

....
-----------------------------------------------------------------------------

Maybe is this the problem?

What can I do for that?


Regards

sohn
sohn is offline   Reply With Quote

Old   March 17, 2015, 04:17
Default
  #6
`e`
Senior Member
 
Join Date: Mar 2015
Posts: 892
Rep Power: 18
`e` is on a distinguished road
Try setting a mass flow rate for the injection streams.
`e` is offline   Reply With Quote

Old   June 29, 2015, 08:17
Default
  #7
New Member
 
Eric Bachmann
Join Date: Jun 2015
Posts: 2
Rep Power: 0
Eric_TUI is on a distinguished road
Hi,

I am new to Fluent and I am also doing DPM and DEM.

I think the order in your injection file is not right. My files are in this order:

((x y z u v w diameter temperature mass-flow)name)

And I´m not using a header in my files. Also you have to set a massflow. Use a very small stoptime (smaller than your timesteps) in your injection an than you have to set your massflow like this:

mf = mass of one particle / stoptime

Hopefully this works for you.

Regards
Eric_TUI is offline   Reply With Quote

Reply

Tags
dpm, fluent, injection, particle

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
log file imani OpenFOAM Running, Solving & CFD 0 July 24, 2014 02:04
Help for the small implementation in turbulence model shipman OpenFOAM Programming & Development 25 March 19, 2014 10:08
Micro Scale Pore, icoFoam gooya_kabir OpenFOAM Running, Solving & CFD 2 November 2, 2013 13:58
How to write k and epsilon before the abnormal end xiuying OpenFOAM Running, Solving & CFD 8 August 27, 2013 15:33
Error while running rhoPisoFoam.. nileshjrane OpenFOAM Running, Solving & CFD 8 August 26, 2010 12:50


All times are GMT -4. The time now is 17:42.