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June 8, 2010, 17:17 |
immiscible flow simulation
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#1 |
New Member
Join Date: Sep 2009
Posts: 5
Rep Power: 16 |
Hi,
I am working on a two-three immiscible flow simulation in a microchannel, i.e., oil and water (half and half), when i using multiphase flow in CFX-12, how could I select the fluid pair, and fluid model? I run some cases, but in the CFX-post, it seems two different velocity fields based on the two fluid are in the same shape (only the values are different), the interface did not have any influence on the fluid flow field. The two fluids' velocity supposed to be the same in the interface and thus change the channel fluid field. Any suggestions? thanks |
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June 8, 2010, 18:19 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
Have a look at the tutorial examples. Free surface flow over a bump will show you how to set this type of problem up.
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June 9, 2010, 15:24 |
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#3 | |
New Member
Join Date: Sep 2009
Posts: 5
Rep Power: 16 |
Quote:
Thanks for your replying, when I use a inlet velocity boundary condition, there is no much problems. However, when I use pressure boundary condition in the inlet, the two fluid messed up, mix together very quick! any one have similar experience, thanks! |
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June 9, 2010, 18:33 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
You have to specify the fluid level somehow. If you do nothing it will assume the fluids are evenly mixed across the inlet. The example shows how to specify the fluid level.
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Tags |
immiscible fluid flow |
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