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dieselEngineFoam: no compression

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Old   November 20, 2011, 09:39
Question dieselEngineFoam: no compression
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virelli giuseppe
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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?
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Old   November 21, 2011, 02:35
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Karl-Johan Nogenmyr
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Did you set U to be movingWall at the piston patch?
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Old   November 21, 2011, 18:05
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virelli giuseppe
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Quote:
Originally Posted by kalle View Post
Did you set U to be movingWall at the piston patch?
Emmm.... NO! 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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