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Old   November 19, 2001, 18:48
Default Discrete Phase Modelling
madhava ram paranandi
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i am presently working on Discrete Phase Modelling in a tubular bowl centrifuge....i have been able to do the particle tracking pretty well i.e i got results which made sense,for a 100 micron and 50 micron particles....but somehow i am having trouble with 10 micron particles....what i mean to say is,no matter how dense a particle I introduce to the system the particle tracking gives the same residence time which doesnt make any other words, i introduced anthracite with density 1500 and gold 20000 and both of them gave me the same residence time!!!!!
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Old   November 19, 2001, 23:08
Default Re: Discrete Phase Modelling
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A) is that 2-way coupling ? B) what is the st number ?

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Old   November 20, 2001, 05:13
Default Re: Discrete Phase Modelling
Jin-Wook LEE
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Dear Sir

It might or might not make sense for small particles. If your flow direction is not changed abruptly, then particle trajectories for small particle are nearly same as fluid pathline, and the residense time might be very similar as that of gas residence time. That is, for very small particles, e.g., 1 micron, drag force might be very larger than particle inertia force, then residence time for particles of different density might be very similar. Please check your flow situation.

Sincerely, Jinwook

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Old   November 20, 2001, 13:48
Default Re: Discrete Phase Modelling
Madhava Ram Paranandi
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Dear Mr.Lee,

thank you very much for throwing in your suggestion.i shall definitely look into it...

madhava ram
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