CFD Online Logo CFD Online URL
Home > Forums > FLUENT

DPM Initialization

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

LinkBack Thread Tools Display Modes
Old   June 20, 2007, 05:01
Default DPM Initialization
Posts: n/a

I want to simulate the vaporization of oil injected through an orifice into a combustion chamber. I'm going to use the DPM and droplets. My question is, I want to calculate the flow field first without the DPM turned on. In one fluent tutorial I read, there was an explanation that I have to turn on the enegery equation and the species transport, when simulating the flow field first. Is this really necessary? Isn't it possible to just use the standard equations and turn on the energy equation and the species transport when turning on the DPM?

Greetings, Johannes.
  Reply With Quote

Old   June 20, 2007, 09:27
Default Re: DPM Initialization
Allan Walsh
Posts: n/a
Sure, you can solve the flow field first but it probably won't be especially interesting or useful. My experience with regular combustion (i.e atmospheric, subsonic flows) is that you can solve the flow field and combustion together, as long as the gradients aren't huge.

When you start solving it, just patch in a reasonable temperature and perhaps an oxygen concentration. Also, you will probably will not solve the droplet phase every iteration so that gives a few (10 or 25) iterations to settle the initial coniditions.
  Reply With Quote


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
DPM Output Problem (Again...) DLINSA Fluent UDF and Scheme Programming 1 March 16, 2012 01:45
FMG initialization query Mohsin FLUENT 4 August 16, 2010 01:21
DPM modeling Mohsin FLUENT 0 March 31, 2010 22:11
DPM - do the particles affect the liquid? Nikhil Dani FLUENT 0 January 1, 2009 12:58
slow after mesh for enhanced wall treat DPM joshkemp FLUENT 0 May 1, 2007 17:20

All times are GMT -4. The time now is 02:47.