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Spray injection and errors

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Old   March 17, 2010, 09:18
Question Spray injection and errors
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Heintz Simon
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Hi,
i'm trying to simulate a spray injection in a chamber (a cube).

I'm new with star-CD, also what can you suggest who can help me ? (model or other tipps)

I have parametrized a simulation with droplet atomization and break-up, with a k-epsilon model, there is just a static air in the chamber before the injection (a flow will come in the future, also there are no inlet and no outlet just a wall). I would like to see the spray.

But when I start the simulation, I have an error :

BEGINNING CELL TO WALL DISTANCE CALCULATION
***ERROR #018 *** NO WALL BOUNDARIES SPECIFIED FOR TWO LAYER MODEL APPLICATION

What's going wrong ?

I thank you in advance
Simon
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Old   March 17, 2010, 11:07
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Pauli
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My guess is you requested a Low-Re model. Either switch to a High Re model or grid your model for Low-Re & specify which wall boundaries you want to have Low-Re treatement.
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Old   March 18, 2010, 06:27
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Heintz Simon
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hi,

the characteristics of my chamber are :
chamber pressure = 60bar
chamber temperature = 800K
injection pressure = 1000bar
injection temperature = 340K
and no flow in the chamber.
Why a low Re model at first ?

why have I an error "no wall boundaries specified" ? I have just created a simple cube grid. What's the problem ?

Thanks already for your answer

Best regards
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Old   March 18, 2010, 11:33
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Joern Beilke
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Try "twol, off".
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