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-   -   How to include lift forces/wall lubrication forces in the MIXTURE multiphase model? (http://www.cfd-online.com/Forums/fluent/71153-how-include-lift-forces-wall-lubrication-forces-mixture-multiphase-model.html)

hohomm December 17, 2009 06:45

How to include lift forces/wall lubrication forces in the MIXTURE multiphase model?
 
Dear All,
I am using the MIXTURE multiphase model for simulation. Seems that only the drag force is considered by default in the slip velocity calculation. Does anyone know how to include other forces such as lift force in the mixture model?

Besides, I have another problem on modelling wall lubrication force using FLUENT(Mixture or Eulerian model). According to Antal's model, wall lubrication force is a function of "the distance to the wall". This force approaches infinity as the distance to the wall approaches zero, and vanishes from a distance only serveral times (2~3?) larger than the bubble diameter. How can I properly calculate this force? How can I choose the near wall mesh size for the wall lubrication model? I really need help and advice..

Thanks in advance.


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