CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

Physical and Chemical time scale in dieselEngineFoam

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 27, 2009, 01:19
Default Physical and Chemical time scale in dieselEngineFoam
  #1
New Member
 
Arun
Join Date: Mar 2009
Posts: 25
Rep Power: 17
arun is on a distinguished road
Hi all,

From literature, the chemical time scale for auto-ignition in diesel engines is
around 1e-9, but setting the physical time step in dieselEngineFoam to this range is very time consuming for the 3-D simulation.

Therefore if larger physical time step such as 0.5 CAD equivalent to 5.2e-5 s (where the crank speed is 1600rpm) is set. Will this give significant difference in predicting the ignition delay period?


Thanks in advance.


Arun
arun is offline   Reply With Quote

Reply

Tags
combustion, diesel, dieselenginefoam, spray


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
about pseudo time Atit Koonsrisuk Main CFD Forum 1 June 1, 2001 13:51
chemical reaction - decompostition La S. Hyuck CFX 1 May 23, 2001 01:07
hints on time steps arturo FLUENT 14 October 31, 2000 03:03


All times are GMT -4. The time now is 15:08.