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Forum: OpenFOAM Pre-Processing

January 13, 2006, 09:29

Replies: 42

DieselEngineFoam

Views: 9,399

Posted By niklas

did you set chemistry on in ch

did you set chemistry on in chemistryProperties?

If it doesnt burn you reactions are too slow.
That means that its either turned off or
that the reaction rate constant in chem.inp is too low.

Forum: OpenFOAM Pre-Processing

January 13, 2006, 08:52

Replies: 42

DieselEngineFoam

Views: 9,399

Posted By niklas

If you havent passsed -66 CAD

If you havent passsed -66 CAD you shouldnt have any combustion yet.

do you have any fuel?

Forum: OpenFOAM Pre-Processing

January 13, 2006, 08:32

Replies: 42

DieselEngineFoam

Views: 9,399

Posted By niklas

That mesh is pretty bad and i

That mesh is pretty bad and
it looks like it needs some outercorrectors...

The problem is in the highly distorted cells,
which requires some extra corrections for the
enthalpy.

use...

Forum: OpenFOAM Pre-Processing

January 12, 2006, 10:17

Replies: 42

DieselEngineFoam

Views: 9,399

Posted By niklas

Wow, that was fast... I sur

Wow, that was fast...

I sure hope you didnt restart from the latest
result, it sounds like it already has gone wrong there.

Remove the last result directory and restart from an earlier...

Forum: OpenFOAM Pre-Processing

January 12, 2006, 09:26

Replies: 42

DieselEngineFoam

Views: 9,399

Posted By niklas

Yes I think I have a clue what

Yes I think I have a clue whats going on.
you're doing non-linear CFD on a complex mesh,
it crashes easily then.

try with nNonOrthogonalCorrectors 1
and upwind for all variables.

I...

Forum: OpenFOAM Pre-Processing

January 12, 2006, 08:02

Replies: 42

DieselEngineFoam

Views: 9,399

Posted By niklas

Those values are incorrect for

Those values are incorrect for engines, since
the values are based on the average pressure
at the start of the simulation.

Maybe they should be removed for moving meshes,
but I've kept...

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