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entrainment rate of particles

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Old   August 4, 2006, 10:11
Default entrainment rate of particles
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pat
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Hello,

I need to study the deposition of water particles in a horizontal pipe (the flow is a gas). How can I implement the entrainment rate of the particles? When using a UDF ("DEFINE_DPM_INJECTION_INIT"), I can initialize the diameters, the density and the velocities of the droplets. However, I have no clue how to initialize the entrainment of these droplets. I am rather new with droplet studies. If you have any idea, please let me know. Many thanks.
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Old   August 4, 2006, 12:15
Default Re: entrainment rate of particles
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Allan Walsh
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Define them, inject them into the flow, track them, and see where they are deposited. What mass fraction of the total flow do the droplets represent? Is the gas temperature high or pressure low such that evaporation is a consideration?
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Old   August 4, 2006, 12:57
Default Re: entrainment rate of particles
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pat
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Hi Allan,

Thanks for your reply. I do not change the gas temperature or the pressure of the flow. I can inject them, track them and see where they deposit. This is not a problem. However, I do not clearly understand what the entrainment rate means. Maybe you can explain this to me.

Many thanks,

Pat
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