# phi-T plot

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

October 29, 2013, 16:14
phi-T plot
#1
New Member

Jason
Join Date: Sep 2011
Posts: 14
Rep Power: 6
Hi All,

I am currently conducting diesel cycle simulation with STAR-CD 4.16. I am wondering if it is possible to get phi-T plot which can explain the soot and NOx formation. The example of phi-T plot is attached.

Attached Images
 images.jpg (12.5 KB, 15 views)

 November 7, 2013, 10:37 #2 New Member   Jason Join Date: Sep 2011 Posts: 14 Rep Power: 6 Does anyone have an idea about it? Still waiting for the solution. Thanks.

 May 6, 2014, 09:59 #3 New Member   Vignesh Join Date: May 2014 Posts: 2 Rep Power: 0 Hi Jason, In order to plot phi-T, you need to calculate phi. phi= equivalence ratio= Mass.fraction of fuel/Mass.fraction of air(oxidizer). Your CFD calculations would have yielded the mass fraction of fuel and oxidizer, in all the cells. You can then use those values to calculate phi, and then plot against temperature values.

 May 19, 2014, 06:25 #4 New Member   Join Date: Jul 2012 Posts: 4 Rep Power: 5 Hi, one thing is also how you calculate Lambda or Phi. This should be calculated so that it is based on the mixture fraction e.g. from Lambda = (m_fu_st(1-f))/f(m_o2_st+m_n2_st) where f is mixture fraction and m_fu_st is the stoichiometric fuel mass.

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post asaijo OpenFOAM Installation 25 October 1, 2015 03:40 sharonyue OpenFOAM Running, Solving & CFD 6 June 10, 2013 09:34 NewtoFOAM OpenFOAM Programming & Development 2 May 8, 2013 05:37 doug OpenFOAM Running, Solving & CFD 4 November 10, 2009 05:33 anindya Main CFD Forum 2 September 17, 2003 12:00

All times are GMT -4. The time now is 20:07.