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the mean of injection velocity magnitude and why wall film can't be used in steady?

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Old   August 21, 2012, 05:04
Default the mean of injection velocity magnitude and why wall film can't be used in steady?
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万然
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I'm simulate spary. But i'm confused by several question .

1.what‘s the mean of injection velocity magnitude in particle injection regions?

I don't konw the difference bewteen injection velocity magnitude and injection direction (contions three velocity of x ,y,z).

Do they coincide with each other or are the same with each other?

2 why wall film can't be used in steady?

Equation dependent(set restitution coefficent ) isn't suitable for my model,
because particle can bounce ,spread and splash(because i simulate it at a constant temperature and cold-wetting surroundings)

Must i simulate it using Elsaesser Particle-Wall Interaction Model in transient simulate???
Transient simulate will greatly increase calculation

Best regards
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