CFD Online Logo CFD Online URL
Home > Forums > OpenFOAM

dieselEngineFoamLayer problems with spray

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

LinkBack Thread Tools Display Modes
Old   March 19, 2010, 14:02
Default dieselEngineFoamLayer problems with spray
Senior Member
Join Date: Oct 2009
Posts: 136
Rep Power: 9
Peter_600 is on a distinguished road
I try simulate the compresson stroke of an engine.
I am using 1.5-dev with a modified solver of dieselEngineFoam.
The modified solver is able to add and remove cells.
So far the movement of the piston with the topological changes didnt make troubble but when I want to inject fuel (for instance C7H16), it seems that the injected fuel doesn t influence the velocity and pressure field. The spray can be visualted with paraview (VTK).
The residuals of C7H16 doesn t change for any reason. Furthermore the added gas mass becomes negative.
When I try to run that case with dieselEngineFoam, it works. I assume that something is going wrong with the added layers.
I appreciate any kind of hints. Has someone experiences with that kind of approaches?
By interest I will upload a test case and the modified solver for adding and removing layers.
Peter_600 is offline   Reply With Quote

Old   March 22, 2010, 09:42
Senior Member
Join Date: Oct 2009
Posts: 136
Rep Power: 9
Peter_600 is on a distinguished road
Problem solved.
I did a mistake in the YEqn.H file.
Just a line was missing
fvm::ddt(rho, Yi)
+ mvConvection->fvmDiv(phi, Yi)
- fvm::laplacian(turbulence->muEff(), Yi)
dieselSpray.evaporationSource(i) <--- added
+ kappa*chemistry.RR(i),

Peter_600 is offline   Reply With Quote

Old   May 7, 2010, 11:01
Default Spray
N. A.
Join Date: May 2010
Posts: 64
Rep Power: 9
N. A. is on a distinguished road
I understand that you added the source term to the equation. Were you able to add the spray source terms for both momentum and energy equation. Can you share how were you able to add all the spray source terms (mass, mometum and energy).
N. A. is offline   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
Problems with Spray Source Terms su_junwei OpenFOAM Running, Solving & CFD 8 May 10, 2009 07:54
Spray slows then stops coastal593 OpenFOAM Running, Solving & CFD 6 July 31, 2007 16:14
spray injection mmacrb FLUENT 0 January 10, 2007 05:57
problems with unsteady spray simulation Mathias FLUENT 1 July 20, 2006 16:13
DPM spray angle David FLUENT 0 December 8, 2003 06:45

All times are GMT -4. The time now is 20:40.