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-   -   dieselEngineFoam: no compression (http://www.cfd-online.com/Forums/openfoam-solving/94586-dieselenginefoam-no-compression.html)

yvyan November 20, 2011 08:39

dieselEngineFoam: no compression
 
Hello everybody,

this is my first post then, sorry if I wrong something!!! :)
I have the following problem:
I am trying to simulate a diesel engine sector (51) with the solver dieselEngineFoam and solving the chemical properties with Chemkin.
I have generated three wall boundaries: (piston, liner and cylinderHead) and a cyclic boundary to define the sector.
My simulation start for now from Bottom Death Center (BDC) (I will change the start of simulation to Intake Valve Closing (IVC) later) I have setted-up the simulation but when I run it the pressure doesn't rise (just few pascal):
p@-180 = 100000 Pa (BDC)
p@0 = 101000 Pa (TDC)

then the combustion does not begin.
Have you got any idea on what could be the error?

kalle November 21, 2011 01:35

Did you set U to be movingWall at the piston patch?

yvyan November 21, 2011 17:05

Quote:

Originally Posted by kalle (Post 332876)
Did you set U to be movingWall at the piston patch?

Emmm.... NO! :D I forgot it! Thank you. I have controlled the initial condition at least 1000 times without to find the error!
Now it seems to work.
Thank you again.
All the best,

Giuseppe.


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