Learning Forum

[UTRGVMTL]

We are trying to simulating the phase change and liquid jet process when the pulse laser beam hit on a layer of liquid (glycerol solution). Due to the experiment, a bubble could be formed and a jet flow could be observed with a liquid droplet drop on the substrate. This whole process is completed in around 200 micron which is a really small time scale. We can generate bubbles due to the evaporation based on the evaporation-condensation model in Fluent both Lee model and Thermal Phase Change model. But the bubble diameter is much smaller compared to the experimental results, and no jet flow was generated. In this case, we are thinking to combine the Cavitation Model and Evaporation and Condensation Model to see if we can get better results. My question is can we just combine these two models by select both of them in the mass transfer mechanisms of the multiphase model? Will the connection between pressure and temperature be an issue for this kind of combination. In addition,  we may need to consider the compressibilty of the vapor. Can the Eulerian model handle this kind of problem? How can we propose the compressible multiphase flow in Fluent?

[DrAmine]

Yes you can. Better to write your own mass transfer model, though. Any cavitation model can be written as thermal phase model. I won't really care about diameters if you are not capturing any interface.