Learning Forum

[Atharva Mahajan]

Hello everyone,

 

I am simulating a solar still in Ansys Fluent to model desalination. Instead of using a collector, I want to use report definitions and expressions to find the amount of water condensing at a boundary (named "glass"). I cannot figure out how to write the expression for the same. I also want a cumulative plot and not condensate values at a particular instant. 

Please help me out with this as soon as possible

Simulation Settings:

Multiphase model: VOF, Implicit
Radiation Model: Rosseland with Solar Loading 
Flow Model: RNG k-epsilon with standard wall treatment

Thank you!

 

 

[Ahmed Hussien]

The approach for calculating the liquid volume will depend on the specific setup of your case. A few factors to consider:

1. Did the domain initially contain liquid, or was it entirely vapor that then starts to condense?

If it's a condensation process where vapor is turning into liquid, you can create a volume integral report to track the volume of the liquid phase over time. This will allow you to monitor the accumulation of the liquid as the condensation occurs.

2. Are you interested in the condensation happening on a specific surface?

In that case, you may want to look into using the Eulerian Wall Film model, which is well-suited for tracking liquid film formation and behavior on surfaces during condensation.