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

Mixture fraction with PPDF combustion

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 12, 2009, 09:22
Default Mixture fraction with PPDF combustion
  #1
Erik
Guest
 
Posts: n/a
Hello, I'm simulating n-heptane combustion in a CI engine using the PPDF model. I've created the flamelet table succesfully using the reaction mechanism for 6 different strain rates. When doing this, Star creates scalars for all the species that are present in the reaction mechanism. I'm injecting n-heptane with Lagrangian multiphase and the liquid heptane is vaporizing to heptane vapour.

But when I start the simulation and heptane vapour is created in the domain, the mixture fraction remains zero so no combustion will occur. Can anybody tell me how to explain Star that the heptane vapour will increase the mixture fraction in a certain cell (as mixture fraction is 1 for the fuel and 0 for the oxidizer). Thanks!

Erik
  Reply With Quote

Old   September 5, 2011, 22:47
Default flame propagation
  #2
New Member
 
Srihari Dinesh Kumar J.
Join Date: Sep 2011
Posts: 2
Rep Power: 0
dineshflame is on a distinguished road
hello....


i am currently doing my thesis on flame propagation by using methane and oxygen could you please help me out by passing me the tutorial...
dineshflame is offline   Reply With Quote

Reply

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
Transport properties with PPDF combustion Erik Siemens 0 February 18, 2009 06:18
Mixture fraction for combustion problem Jonathan Lemay CFX 3 November 5, 2007 15:57
Methane combustion using PPDF CPRL Siemens 0 July 19, 2007 14:28
Mixture fraction in Partially premixed combustion Viktor FLUENT 1 December 30, 2005 00:30
Mixture Fraction Carly Main CFD Forum 0 August 23, 2005 05:42


All times are GMT -4. The time now is 01:48.