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

Help with droplet injection!!

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 9, 2007, 12:53
Default Help with droplet injection!!
  #1
Maria
Guest
 
Posts: n/a
Hi all, I am new in CFX and I am trying to simulate fuel spray injection. Does anyone know whether and how we can use variable flow rate for the injection conditions?? thanks......
  Reply With Quote

Old   August 16, 2007, 04:53
Default Re: Help with droplet injection!!
  #2
Anderson T F
Guest
 
Posts: n/a
Hi,

I am not sure about what you wanna know, but letīs see:

You will set the composition of the particle (then density is set). Later you will set the size of your droplet (volume is set). Finally you set the number particles (which will work more or less as a total volumetric flow rate). And now you have a problem: since density and volumetric flow rate are fixed, how can you set the mass flow rate?

As I understood from the help files, the number, size and density of droplets are calculated as you have set. So you can see exactly how they are carried by the flow.

However, when the CFX will calculate the effect of the particles in the flow of the continuum, the mass flow rate will be used to determine how many "real particles" one "simulated particle" is representing (I like to imagine it as a small train, made of lots of single similar particles which follow all the same path, but as a group, have more influence on the continuum).

Got it?

  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
droplet falling - VOF bohis FLUENT 1 July 10, 2013 04:28
DieselFoam Droplet Temperature Issues - OF 1.6 viv05 OpenFOAM 0 February 27, 2010 12:20
Droplet Injection varunrajendra FLUENT 4 August 19, 2009 12:46
Help!!!! - Droplet Injection varunrajendra FLUENT 0 August 15, 2009 11:26
DPM,define the instantaneous droplet injection vel Stan FLUENT 0 July 12, 2008 07:32


All times are GMT -4. The time now is 03:10.