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November 30, 2007, 11:35
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I use dieselEngineFoam for com
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Member
Tomislav Sencic
Join Date: Mar 2009
Posts: 42
Rep Power: 17  |
I use dieselEngineFoam for combustion simulation. I noticed that mean cylinder pressure and temperature do not follow rules for adiabatic compression (my BC are adiabatic walls). I didn't notice it before since I was observing just the combustion period, but I noticed it when pressure and temperature were even decreasing during compression! It could be related to the fact that I receive the "added gas mas" different then 0 (sometimes negative) during compression. Is it a bug or I am doing something wrong?
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December 12, 2007, 05:39
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Sorry, my mistake. My velocity
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#2 |
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Member
Tomislav Sencic
Join Date: Mar 2009
Posts: 42
Rep Power: 17 |
Sorry, my mistake. My velocity (U) boundary conditions were wrong. I had zeroGradient, and there had to be fixedValue (0 0 0), and for the piston movingWallVelocity (0 0 0).
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