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March 2, 2010 2:46pm UTC in response to Michael Stein

Re: Simulation Nozzle and Spray

Start by drawing the geometry with COMSOL.

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March 2, 2010 6:29pm UTC in response to Michael Stein

Re: Simulation Nozzle and Spray

Michael,

I hesitated before I decided to respond because I don't like discouraging people but I think what you are wanting to do is a hugely monumental task and you don't realize what you are up against :) Please forgive my candor.

Simulating drop breakup/spray formation from first principles is very hard because 1- the underlying physics is non-trivial (not that N-S is trivial itself, but this is even more complicated due to the nature of free surface BCs) and 2- implemeting this computationally is very difficult too. Belive me I would know because I spent my entire Ph.D. coming up with a way of doing this for a single droplet and simulating it with finite element code that I wrote myself.

I suggest you find some literature and read up on the subject to see for yourself the underlying physics/math before you even begin to worry about simulating it.

If you need engineering answers there might be other feasible ways of getting them (engineering correlations, experiments etc.). Although I am a computational guy myself, CFD is not always the best way to go after a problem- it all depends on what you want and what your constraints are.

Hope this helps
Ozgur

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