{"id":168905,"date":"2022-04-26T14:17:20","date_gmt":"2022-04-26T14:17:20","guid":{"rendered":"\/forum\/forums\/topic\/why-random-distribution-of-liquid-slugs-and-vapor-plugs-is-not-achieved\/"},"modified":"2022-04-28T16:16:56","modified_gmt":"2022-04-28T16:16:56","slug":"why-random-distribution-of-liquid-slugs-and-vapor-plugs-is-not-achieved","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/why-random-distribution-of-liquid-slugs-and-vapor-plugs-is-not-achieved\/","title":{"rendered":"Why random distribution of liquid slugs and vapor plugs is not achieved?"},"content":{"rendered":"
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Hello,<\/p>\n

I am working on a two phase transient model, using VOF-multiphase model. <\/p>\n

My model has three section: evaporator, condenser and adiabatic section.<\/p>\n

primary phase – liquid<\/p>\n

secondary phase – vapor <\/p>\n

phase interaction – evaporation-condensation model (LEE model)<\/p>\n

surface tension = continuum surface force, wall adhesion, jump adhesion<\/p>\n

I am initializing my solution as:<\/p>\n

Temperature = Condenser temperature <\/p>\n

Pressure = Saturation pressure at condenser temperature <\/p>\n

I have created a register and I have patched with 100% volume fraction of vapor in that region.<\/p>\n

Evaporator = Constant Heat flux<\/p>\n

Condenser = Constant temperature <\/p>\n

Adiabatic section = zero heat flux<\/p>\n

<\/p>\n<\/p>\n

The starting problem that I am facing is that the research papers that I am referring to have claimed that they first give constant temperature boundary conditions to all three sections so as to get RANDOM DISTRIUTION OF LIQUID SLUGS AND VAPOR PLUGS (formed due to surface tension force and gravity force), once the RANDOM DISTRIBUTION IS ACHIEVED, then they give constant heat flux, and zero heat flux to evaporator and adiabatic section respectively.<\/p>\n

But I am not able to get this distribution and I am not able to track the reason for this.<\/p>\n

Any help will be highly appreciated.<\/p>\n

thanks<\/p>\n

Abhinav<\/p>\n

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