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March 6, 2008, 10:28 |
the role of the atomization model
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#1 |
Guest
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Hi
I try to model spray injection. In Star-cd, there are 4 atomization models. According to the methodology, nozzle turbulence, surface wave growth, droplet size distribution, spray andgle and initial velocity will be calculated in atomization model. I think this is very similar to the mechanism of the primary breakup. And Star-cd also provide the droplet breakup model which I think the secondary breakup. So, I want to analyze the spray injection model using primary and secondary breakup. Is it possible? (primary breakup = atomization model) (secondary breakup = droplet breakup model) Thanks and Regard... |
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March 6, 2008, 10:34 |
Re: the role of the atomization model
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#2 |
Guest
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Yes, you are right.
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March 7, 2008, 21:16 |
Re: the role of the atomization model
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#3 |
Guest
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You are right:
atomization = primary breakup breakup = secondary br. I suggest to use Huh's model for the atomization (because with that model you don't have to specify any spray angle, so you'll get a "natural" spray angle, not forced numerically) and then to use Reitz or Hsiang-Faeth secondary breakup... Sometimes at partial load you can get better results on the atomization by using Reitz-Model, but you need to know an exact spray angle...(and so you need experimental data) |
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