[weiling]

Hi all, this is my first post here, and i would be grateful if anyone could help me.

I need to model a wet porous media's drying process. I have tried to simplified my problem and more details are here:

1.There is only one 2D rectangular fluid zone, and only one boundary sets the heat and mass trasfer BC by using an udf.
2.The fluid zone is set to a porous zone(in cell zone conditions), the models includes multiphase, energy, viscous and species. There are two phases, incluing water-liquid and gas mixture(water vapour and air).
3.According to a reference article, i have tried to define 4 uds equatiions(repectively about water mass, vapor mass, phase volume fraction, energy)

The equations i want to implement are shown in attachments.
I have 2 questions:
1.Do I have to use the fluent built-in model to implement multiphase flows?(Now i have to use vof or other models so that i can set phases' properties, then their properties can be used in udfs)
2.I found the conservation equations of multiphase flow models(VOF,mixtue,Eulerian) in ANSYS_Fluent_Theory_Guide, they all have the convection term, but the equatinos i want to implement only have transient, diffusion and source terms, is there anyway i can omit the convection term?(The continuity equation of mixture model even doesn't have the diffusion term)

[M.Panahi]

Hi,
I want to simulat same of your simulat .
Can you simulat?
I want choos the model of Eulearian phase.
Is it primary phase is the air?
I attach the physics of simulation as you see the picture of down.