In reply to 云天 庞.

您好，暂时没有包含相间传质的分离型两相流案例，或许您可以参考基于分散型两相流的液-液萃取案例（对应本文后半部分）：//www.denkrieger.com/model/liquidliquid-extraction-114131

In reply to Jun Leng.

但这个案例的分离式两相流并不包含相间传质

In reply to 云天 庞.

您好，可参考以下官网案例：//www.denkrieger.com/model/droplet-rising-through-a-suspension-90401

请问有本文中这个
乙醇中上升油滴的案例么

In reply to Ying (Grace) Xu.

Excuse me, do you have this model?

In reply to 业昌 郭.

Dear 业昌

When using the two-phase flow moving mesh interface, then the partition coefficient is used in the boundary conditions. For the concentration for a solute in one phase, e.g. phase 1, becomes a function of the concentration of the same solute in phase 2:
c1 = f(c2)
For the equation of the solute in phase 2, you can instead use the fact that the flux has to be continuous over the phase boundary:
flux(c1)*n1 = – flux(c2)*n2, where n1 and n2 are the normal outwards vector at the boundary for the respective phase. The principle is demonstrated for a membrane in this model, see specifically slide 5 in the PowerPoint file:
https://www.comsol.com/model/separation-through-dialysis-258

For a dispersed flow model, this becomes more complicated to formulate but on the other hand it is also easier to solve. You then need to have an expression for the mass transfer coefficient at the phase boundary, usually only in the phase where transport is rate determining. This may also yield an additional concentration variable at the phase boundary for each phase and each solute. Then you use the same principle as above but for the homogenized reaction term instead, i.e. for one solute equation you use the equilibrium condition at the boundary and for the other you use the mass transport coefficient to get an equal reaction but with opposite sign in each point in space for the two phases. We will create a few example models with this feature exemplified during the year.

Best regards,
Ed

Could you please introduce how to deal with the partition coefficient? Thank you very much