Help to simulate evaporation in ANSYS Fluent
Hello
I’m trying to simulate water evaporation in Ansys Fluent 14.0 and I’m relatively new with the software. I don’t know if someone can help me with the simulation? These are the parameters that I introduce in Fluent. Analysis: 2D, Double Precision Scale: Specify Scaling Factors: X=Y=0,01 View Length Unit in:m General Settings: Pressure-Based Transient Absolute Gravity (y=-9,81) Models: Multiphase->VOF Energy->ON Materials: Air Water-liquid Phases: Air=Primary Phase Water-liquid=Second Phase Interaction-> Mass Tab->Mechanism->Evaporation-condensatio Interaction-> Surface Tension Tab ->Surface Tension Force Modeling->ON Boundary Conditions: inlet (Phase=mixture)->Edit->Momentum Tab-> Velocity Magnitude(m/s)=0,5 inlet (Phase=water-liquid)->Edit->Multiphase Tab->Volume Fraction=1 Wall (Phase=wáter-liquid)->Edit->Thermal Tab->Temperature (k)=373 Solution Methods: Pressure-Velocity Coupling->SIMPLE Spatial Discretization->Gradiet->Least Squares Cell Based Spatial Discretization->Pressure->PRESTO! Spatial Discretization->Momentum->QUICK Spatial Discretization->Volumen Fraction-> QUICK Spatial Discretization->Energy-> QUICK Solution Initialization: Standard Patch:Phase->Mixture Variable->Temperature Value(K)->1 Zones to Patch->Fluid_air & Fluid_water Run:Time Step Size(s)->1e-05 Number of Time Steps->1000 |
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I have a a similar case although if you could name it! ;) because mine has high speed and pressure also! so the effects of gravity can be neglected . and I'm not professional. but as I know VOF model works in the cases which you are more interested in free surface like open channel and... am I right? maybe it could help me! I use mixture model instead. also, my case is a steady one. have you progressed in your case? I have some problems especially with continuity! because the inlet and outlet not only are not the same but also have different order! and it makes me disappointed! I'm working on it. have you any idea? anything which might help will be appreciated. thanks. ali |
Hello Ali
Neither am I an expert =) Unfortunately, I have any result from the simulation. I don't know what multiphase model is better for your case. I'm trying with VOF but if I can't run with VOF, I would to change to Mixture or Euler. I dont Know but if you could to get that the inlet and the outlet have the same order, the problem could be easier, I think Regards ;) |
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