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November 6, 2015, 11:19 |
Corresponding model for VOF
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#1 |
Senior Member
yaseen
Join Date: Oct 2015
Location: Hawler
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What is the corresponding model for VOF ( in FLUENT) in ANSYS CFX, in CFX only there is a multi phase - check box for homogeneous.
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November 8, 2015, 05:00 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
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That's right, the corresponding model is multiphase with homogeneous velocity fields.
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November 8, 2015, 05:18 |
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#3 |
Senior Member
yaseen
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Glenn Horrocks thanks a lot but what about homogeneous velocity field, if velocity in non homogeneous in x-y-z directions?
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November 8, 2015, 05:20 |
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#4 |
Super Moderator
Glenn Horrocks
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Then don't select the homogeneous model - and you will be using a eularian-eularian model with interphase slip.
But I suspect I misunderstand you. Can you explain what the flow you are trying to model is? |
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November 9, 2015, 11:44 |
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#5 |
Senior Member
yaseen
Join Date: Oct 2015
Location: Hawler
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OK, flow of water in side channel spillway as shown in fig. water from reservoir in three side with high velocity enter a channel (called spatially varied flow) shown in fig. If the check box of homogeneous is unchecked this is eularian-eularian model??
http://www.cfd-online.com/Forums/att...1&d=1447087300 http://www.cfd-online.com/Forums/att...1&d=1447087427 |
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November 9, 2015, 16:10 |
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#6 |
Super Moderator
Glenn Horrocks
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Correct. Make sure you read the CFX documentation on these models so you know what the options mean.
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November 10, 2015, 13:50 |
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#7 |
Senior Member
yaseen
Join Date: Oct 2015
Location: Hawler
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I read some document about CFX, can you say more specific? did you agree with using homogeneous model and SST turbulent model? thanks.
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November 10, 2015, 19:48 |
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#8 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
The documentation explains the things to consider when deciding between homogeneous and non-homogeneous. The main thing is whether a single resolvable interface between air and water exists or whether there is significant small features (foam, bubbles, spray etc).
If you are going to do multiphase simulation in CFX I strongly recommend you spend the time to read ALL the multiphase section in all the CFX manuals. They have many recommendations for model implementation, meshing and many other factors. |
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