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

kivaTest - more compression cycles

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 19, 2014, 18:49
Default kivaTest - more compression cycles
  #1
New Member
 
Giulio
Join Date: Oct 2011
Posts: 28
Rep Power: 14
giulio.topazio is on a distinguished road
Dear all, i want to investigate the effects on the solution through the stabilization of the initial conditions of turbulence. That's why i want to duplicate the compression phase making 3 cycle of "cold" simulation. In kivaTest i try to modify the controlDict1, the controlDict2 and the start of ignition in combustionProperties but engineFoam crashes while calculating the case for -8° crank angle.





What am I doing wrong?Any suggestions?


Thanks to anyone who answers.
giulio.topazio is offline   Reply With Quote

Old   June 21, 2014, 04:12
Default
  #2
New Member
 
Giulio
Join Date: Oct 2011
Posts: 28
Rep Power: 14
giulio.topazio is on a distinguished road
solved! I made ​​a silly mistake. I tried to integrate the TDC with the same time step of the other crank angle. I created a new controlDict for the angles at TDC with a time step 10 times smaller. so runs...

Anyway, i still have a doubt: no one noticed that the pressure values ​​are very low?(i would expect values of at least 40 bar) also by calculating and plotting the ROHR, k and epsilon can not see the effect of combustion...seems to be much slower than the turbulence. am I doing wrong?! Considerations? thanks for the help
giulio.topazio 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
ANSYS Compression only/Elastic support yavuz.hspc Structural Mechanics 0 June 6, 2014 10:23
Dynamic Mesh - Compression ZenCef FLUENT 0 January 27, 2011 04:58
Modelling the heat transfer during compression and cooling of natural gas pano Main CFD Forum 0 December 10, 2010 16:53
VOF interface compression and mesh size idrama OpenFOAM 1 September 26, 2010 07:36
compression process-dynamic meshes AMV FLUENT 2 June 24, 2003 02:58


All times are GMT -4. The time now is 03:47.