[oliveira1820]

I´m simulating a 900W energy source in a domain with liquid water and vapour water, that will heat the fluids. I know that the fluids will mix, be turbulent and evaporate next to the source and condensate near the walls (phase change).

I choose the Particle model (if you think I should select a beter one pls tell me)

This are my setup options:

Transient Simulation with 0,1s of iteration step time.

Basic Settings:

Liquid Water - Continuous Fluid ; Vapour Water - Dispersed Fluid with 0,05 mm (mean diameter)


FLUID MODELS:

Multiphase: Inhomogeneous

Heat Transfer: Total Energy (Including Viscous Work Term)



FLUID SPECIFIC MODELS:

Fluid Buoyancy Model: Density Difference

Turbulence: Liquid Water - k-epsilon; Vapour Water - Dispersed Phase Zero Equation



FLUID PAIR MODLES:

Interphase Transfer: Particle Model

Momentum Transfer: Drag Force - Ishii Zuber

Turbulence Transfer: Sato Enhanced Eddy Viscosity

Phase Change Model - Thermal Phase Change

Heat Transfer : Two Resistance :::Liquid Water - Ranz Marshall; Vapour Water - Zero Resistance


If I solve with this parameters all goes right but then, when I introduce mass transfer:

Mass Transfer - Phase Change

The momentum components of the liquid water diverges allot. it only works if the mean diameter of the dispersed fluid is 1mm, which I think it´s too big comparing with the reality. Does anybody have any idea how to solve this problem with mass transfer?


Is the mass transfer really needed to completely simulate the phase change between the waters?