bubbleFoam limitations
I am currently using bubbleFoam in one of my projects.
I has read the wiki for this solver and was wondering if anyone knows of any work done in the following areas: http://openfoamwiki.net/index.php/Bu...am_limitations 1) The diameter of the particles1 constituting the dispersed phase is assumed to be constant. Aggragation, breakage and coalescence phenomena are not accounted for 2) The drag coeﬃcient is computed as a blend of the drag coeﬃcients evaluated for each phase on the basis of the phase fractions, and no alternative drag models are available Any info on this would be greatly appreciated! Thanks, Chris 
1) This is true. I know there have been a few people around (including myself) that have implemented population balance with breakup and coalescenceFYI, multiphaseEulerFoam IS set up to accept new nonconstant diameter models though the only one implemented in the release version is isoThermalDiameter (vary bubble size with pressure).
2) This is true of bubbleFoam, but NOT true of twoPhaseEulerFoam. See twoPhaseEulerFoam/interfacialModels/dragModels. Kent 
On the issue of dragModels. I should also mention that multiphaseEulerFoam at least is able to compute the drag with a specified dispersed phase OR in a blended way. The desired method is defined in transportProperties.

Quote:
Chris 
I am working on reduced population balance models similar to the one used in:
Drumm, C.; Attarakih, M.; Hlawitschka, M. W. & Bart, H.J. Onegroup reduced population balance model for CFD simulation of a pilotplant extraction column Ind. Eng. Che. Res., 49, 34423451 (2010).The basis for this is multiphaseEulerFoam which can do the EulerEuler part for the population balance, but also can do the VOFtype sharp interface that I need for my particular multiphase application. Luis Silva has implemented DQMOM solvers in OpenFOAM. One of his papers that talks of this is: L. F. L. R. Silva and P. L. C. Lage, Development and implementation of a polydispersed multiphase flow model in OpenFOAM. Comp. & Chem. Eng. 35, pp. 2653–2666 (2011).Daniele Marchisio has also developed an OpenFOAM PBE solver(s). There is one paper mentioning it here. 
All times are GMT 4. The time now is 03:39. 