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November 4, 2014, 07:36 |
Pressure contour
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#1 |
New Member
kensuke tanaka
Join Date: Jan 2014
Posts: 24
Rep Power: 12 |
Hello!
If you answer my questions, I appreciate your advices! I study about the fluid dynamics in a bubble column. The bubble dissolve into the liquid. In CFD-POST, I got bad results of pressure contours(fig1). In fig1, bubble(co2) dissolved. I want to get like this(fig2). In fig2, bubble(air) didn't resolve. Why did I get that result? I get that reslut when I study about the bubble which dissolves into liquid. And which pressure contours do I have to use? Thank you! Last edited by japanese student; November 5, 2014 at 23:00. |
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November 5, 2014, 22:58 |
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#2 |
New Member
kensuke tanaka
Join Date: Jan 2014
Posts: 24
Rep Power: 12 |
Please help my question.
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November 12, 2014, 22:54 |
detail settings
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#3 |
New Member
kensuke tanaka
Join Date: Jan 2014
Posts: 24
Rep Power: 12 |
I couldn't get any advices of the Pressure contoure, so I give you detail settings.
If you give me some advices, I express my thanks! The system:The bubble which dissolves in the liquid rises in the bubble column(2D). The settings: General; transient, gravity -9.8 Models; vof (Explicit), species transfer Materials; water, co2 Phases; phase-1(mixture), phase-2(mixture) Interactions; phase-1(co2)to phase-2(water) mass=5(kg/m3・s) Boundary; inlet(0.14m/s), outflow Solution method; NITA time step; 5e-5 When the mass is much less(0.001kg/m3・s ect ....), the pressure contour is good. Why is the pressure contour is bad, when the mass is big? Thank you! |
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December 27, 2014, 11:30 |
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#4 |
New Member
kensuke tanaka
Join Date: Jan 2014
Posts: 24
Rep Power: 12 |
Hello,everyone!
I probably got the reason the pressure contour is strange. I assume the fluid is the incompressible fluid, but the density has changed after the mass transfer across the liquid-gas interface occered. So, I want to get how to make the density constant. If you tell me some advices, I am very happy. Thanks! |
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