Bubbles rising in the vertical column
Hi all,
I want to simulate rising bubbles with different sizes (1 mm to 10 mm) in a vertical column. I tried single bubble different sizes using VOF method. But for multiple bubbles i am not sure what to do???? Can any one give me some idea ? Thanks Ravi. |
Re: Bubbles rising in the vertical column
You need to patch different regions as bubbles of different sizes.
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Re: Bubbles rising in the vertical column
i also want to simulate a single rising bubble in a vertical column.how should i do it?
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Hello Friends, Can anyone send me the model of Bubble rising in a vertical tube or please suggest me the boundary conditions as i am interested in simulating the rise of air bubble inside a channel where the water is flowing from the bottom. please tell me the boundary conditions.
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Have you made any progress yet? Please leave me a message so that we can discuss further. Thank you~ |
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You can simulate using CFX. If you have a plate spager or its variation you can 'insert' the 'injection points' and define the velocity at each of these points. Specify the Opening as an 'outlet' with the degassing boundary condition such that it allows the air to escape while reflects the water back into the column. I initialize the column with liquid hold up as 1 and initial velocity zero everywhere. Use CFX if you wanna simulate the multiphase flows with LES and others (Fluent doesnt allow LES of Multiphase flows)..hope this suffices
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Hello guys!
I work in that type of project.I succed in simulated the rise of a Taylor bubble in a vertical tube in a stagnant liquid for diameter ranging from 5 to 10 mm but below 5mm,the simulations are not conclusive.I'm trying to fix the problem But yes,you have to patch the domain in fluent in order to generate a bubble...And you do the same for more bubbles. PS:If you want to use less memory and time calculation,construct an horizontal tube and draw only the half diameter.In fluent,use axisymetric option and gravity in X direction.It works well Good luck |
"How to monitor velocity of a single bubble rising in vertical column? "
Hi,
does anybody know how can I monitor the rising velocity of single bubble which is rising in a 2D column? |
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