CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

internal combustion engines with FLUENT

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

LinkBack Thread Tools Display Modes
Old   April 13, 1999, 20:15
Default internal combustion engines with FLUENT
Posts: n/a

I'm trying to simulate an internal combustion engine, with FLUENT, but I don't obtain convergence for the pressure..

I thought that perhaps FLUENT is not prepare to work with compressible flows, because all of the examples they gave are with entrances and outlets defined perfectly.

the simplified ICE I tryed to simulate was a rectangle, with one entrance to fuel, another to ar and one outlet. and they have boundary conditions varying with time.

really I don't get anything..

Is there anybody that get something and how??

thanks a lot
  Reply With Quote

Old   April 14, 1999, 13:10
Default Re: internal combustion engines with FLUENT
Posts: n/a
I have been working with fluent 4 and fluent 5 for about a year simulating scram jet combustion chamber. 2d and 3d. I have always had a difficult time obtaining convergence for pressure. It is extemely grid dependent. I have found that using a low underrelaxation approx 0.2 for velocity and pressure help also. Ussually i use 0.5 for species,viscosity, etal.

any more questions please email me at
  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
CFD simulation in Internal Combustion Engine Anne Main CFD Forum 19 June 29, 2015 03:23
Help with combustion in FLUENT black mamba FLUENT 1 April 21, 2010 05:19
Internal combustion engine Akuma FLUENT 0 January 30, 2007 03:58
combustion in internal combustion engine George Main CFD Forum 0 September 7, 2006 14:41
Coal combustion with Fluent 4.5 or 5.0! Sriram Popuri Main CFD Forum 2 July 24, 1999 11:34

All times are GMT -4. The time now is 09:50.