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Specialty Chemistry Forums => Chemical Engineering Forum => Topic started by: itsmegame on February 07, 2013, 01:25:54 AM

Title: Model for Evaporatioin of water
Post by: itsmegame on February 07, 2013, 01:25:54 AM

Dear members,
I wouuld like to know the model to be used for modelling evaporation of water from a test tube containing water and sand. it would be very helpful if someone guides me in this, by directing me to the governing equations and boundary conditions . i am very new to modelling, im installing matlab currently.
Thank you

Title: Re: Model for Evaporatioin of water
Post by: Enthalpy on February 10, 2013, 07:14:22 PM

Antoine's equation gives the vapour pressure. For instance on Wiki. Provided, of course, that sand is at the bottom hence plays no role.

Then, depending on the setup, vapour diffusion in air, or air movement, can (may well) limit the evaporation speed, and then you're in serious trouble.