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VoF model, two phases, but only able to show velocity of the phase "mixture"? |
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June 8, 2017, 07:22 |
VoF model, two phases, but only able to show velocity of the phase "mixture"?
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#1 |
New Member
Yu Lu
Join Date: Jul 2015
Location: England
Posts: 26
Rep Power: 11 |
Hi all
I'm working on a simple simulation where two immiscible liquid flows in a pipe. I'm using VoF model with two phases (both liquid, immiscible, properties separately defined, surface tension force modelling enabled). When I was trying to check some results, the volume fraction contours of both phases shows fine. However the contours or vectors of velocity can only choose the phase "mixture" instead of my two phases in the "phase" drop-down list. Why is this? Many thanks |
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June 8, 2017, 10:11 |
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#2 |
Senior Member
Join Date: Aug 2014
Location: Germany
Posts: 292
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VOF model calculates only one velocity field, that of the mixture. So both phases share the same velocity.
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March 23, 2018, 08:21 |
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#3 | |
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nader
Join Date: Nov 2013
Posts: 9
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Quote:
Here is the way that you need to follow in CFD Post: - Expressions- New- phase2 volume fraction * velocity (In order to avoid typo you can choose different parameters by right clicking in free area) - variables- new - select expression that you made in previous step Now you will see that you have new variables that only shows your phase2 velocity. |
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March 24, 2018, 11:54 |
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#4 | |
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Hamed Abdul Majeed
Join Date: May 2012
Location: New Orleans, LA, US
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Quote:
You cannot get phase 2 velocity as you solved a shared velocity field to begin with. |
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March 24, 2018, 11:59 |
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#5 | |
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nader
Join Date: Nov 2013
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Quote:
you are telling cfd post to show you only on of the velocities. It doesn't have anything to do with solution method and calculation processes. |
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March 25, 2018, 12:28 |
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#6 | |
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Hamed Abdul Majeed
Join Date: May 2012
Location: New Orleans, LA, US
Posts: 147
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Quote:
But my point is, would that be a representation of phase 2 velocity or not? |
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March 25, 2018, 12:31 |
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#7 |
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nader
Join Date: Nov 2013
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December 25, 2021, 09:35 |
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#8 | |
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Mandeep Shetty
Join Date: Apr 2016
Posts: 188
Rep Power: 10 |
Quote:
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velocity contours, vof model |
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