Hi every one !
While using CFD codes ( Fluent 16 ) what should be the best practice for the following ?
Suppose a vertical rectangular bubble column( 30*60*6 = X,Y,Z cm ) , Single inlet at bottom with dimension 3mm*1.5mm , Velocity at inlet supposed to 0.06 m/s.
1) Velocity Inlet Boundary Conditions.. And also the Wall conditions ?
2) What should be the outflow ? Pressure Out or Degassing ?
3) Population Balance Models, How to treat this models ? i.e, BINS(CLasses) , Exponent Rato, Minimun Dia of Air ? what should be the boundary values of bins fractions if Inlet air dia is supposed to 8mm.
4) In the momentum Equation, how many forces can we include for overall best phenomenon ? Added mass, Drag, Lift, Wall Lubrication, Turbulent Dispersion, Turbulent Interaction, Surface Tension ?
5) For INITIALIZE... what should be the important changes ?
There are so many other factors that any expert can suggest to emphasis.
Please suggest..
You have described all cares that you can have to simulate a bubble column. There are many approaches regarding boundary conditions, free-slip to gas no slip to liquid, degassing, opening, sink of mass. Euler-euler, euler-lagrange, populational balance, etc. all of them ar right and can be applied.
The two big issues are Initialization and the top boundary condition. I have a paper and a thesis with a oscillatory bubble column. You can find my numerical protocol, and a lot of references. One of them may be useful to you.
Thesis MODELO DE FECHAMENTO PARA O TENSOR DE INTERFACE NO MODELO DE...
Conference Paper SIMULAÇÃO DA DINÂMICA DE COLUNA DE BOLHAS
Thank you Doctor,
Ricardo Vicente de Paula Rezende,
I am reading these papers....
If you still have not familiarize - you have to look on settings in OpenFOAM tutorial cases about bubble column modeling:
- OpenFOAM-3.0.x/tutorials/multiphase/multiphaseEulerFoam/bubbleColumn/
- bubbleColumn cases in OpenFOAM-3.0.x/tutorials/multiphase/twoPhaseEulerFoam/
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