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Old   June 7, 2006, 12:08
Default multiphase model & separation
  #1
naser
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Hi every body

Actually my model is a horizontal pipe with oil/water flow.

If it is possible, I would like to directing me which model should I use: VOF, multiphase, or eulerian such that I got the two pahses are seprated; water is down and oil is above due to their densties?

Is there any one have did similar model before and can direct me?

Best Regards, Naser

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Old   June 7, 2006, 17:02
Default Re: multiphase model & separation
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siao fei
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i think using Eulerian is a good choice. however, patch the pipe first for the water and oil level before u start simulating, to make sure the level is separated. it is kinda difficult to run the simulation without patching, and wait for the separation due to their density and gravity.
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Old   June 7, 2006, 18:30
Default Re: multiphase model & separation
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naser
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Thank you siao for your kind reply.

What do you mean by "patching"?

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Old   June 7, 2006, 19:45
Default Re: multiphase model & separation
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Maciej
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patching is second, optional step of initialisation. First you initialize whole volume to contain e.g. water and then you patch the upper part with lighter oil phase. So you have to make Adapt/Region - that region, when you create it (Mark), will be accesible in the panel Solve/Initialize/Patch.

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Old   June 8, 2006, 04:08
Default Re: multiphase model & separation
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naser
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Thanks Maciej

Still I think It's bettere if I got a tutorial for simulating a model similar to mine...any one can help??
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Old   June 9, 2006, 06:12
Default Re: multiphase model & separation
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kotan
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How can we initialize volume fraction for annular flow?

initialize and patch is not good way for annular flow.

thanks already for your answers
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