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Old   April 8, 2003, 07:37
Default DPM question!
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winnie
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now, i am at the beginning of my study on DPM to simulate bubly flow. in the DPM, continuous phase is modeled using N-S equations. since the bubble trajectory can effect the local void fraction, also it will effect the volume fraction of continuous phase, how do the fluent deal with the continuous phase equation? equations similar to ones in two-fluid model or neglect the bubble volume fraction?

many thanks to any help!
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Old   April 8, 2003, 10:52
Default Re: DPM question!
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Alex Munoz
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My friend

I suggest that write first about the Discrete phase model before you run your simmulation. I recommend the paper writen by MacInnes and F V Bracco 1992 Stochastic particle dispersion modeling and the tracer particle limit. Phys. Fluids A 4 (12)2809-2824. also read the paper of Domgin et al. (1997) Coupling of a Langrangian model with a CFD code Application to the numerical modelling of the turbulent dispersion of droplets in a turbulent pipe flow. Journal of Hydraulic Research 35 (4). 473-490.

Regards

Alex Munoz
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Old   April 8, 2003, 22:14
Default Re: DPM question!
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winnie
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firstly, thank you for your help! and i am so sorry that i will bother you once again. Because i am in China and the papers in English i can get here are limited, i haven't find the paper of Domgin et al. (1997) Coupling of a Langrangian model with a CFD code Application to the numerical modelling of the turbulent dispersion of droplets in a turbulent pipe flow. Journal of Hydraulic Research 35 (4). 473-490. i don't know if you have e-paper and if you have one, can you send it to me from email? my email address is wenting@mailst.xjtu.edu.cn. Thanks again!
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Old   April 8, 2003, 22:28
Default Re: DPM question!
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Alex Munoz
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Hi

I am sorry, but I don't have a electronic copy.

Regards

Alex Munoz
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Old   April 9, 2003, 02:02
Default Re: DPM question!
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Alexandre
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Hi,

I had the same problem and asked the support. They told me (after checking in the code) that Fluent didn't take into account the volume of the dispersed phase to define the volume disponible for the continuous phase.

Hope it helps.

Alexandre
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Old   April 9, 2003, 08:36
Default Re: DPM question!
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winnie
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hi, Alexandre

thank you! it is really helpful!

It means that the dispersed phase can be regarded as points that don't occupy any space but have interactions with continuous phase such as momentum and energy transfer, does it?

so i can get the continuous phase properties from the single phase equeations in which the source terms include the effect of the diepersed phase.

right? thank you again!

winnie.
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