Drying modeling radiation and convection

julia231199 · July 27, 2022, 06:50

Hi,

I need to model the mass and heat transfer of a thin (1cm) layer of water. The heat source is an IR heater that is siting 10 cm above the layer and air is flowing between the water layer and the heater. ** see sketch **. How can I begin to model this? I want to know how long it takes for the water to fully evaporate. I have the flux and temperature of the heater and the air conditions/velocity.

ANSYS.PNG

Thank you in advance,
Julia

Kasidit · July 30, 2022, 10:27

Hello Julia,

I've simulated a water evaporation model like you.

As far as I know, we need to consider one of the multiphase models (VOF, mixture, and Eulerian). Phase 1 consists of air and water-vapor while phase 2 consists of water-liquid. To model evaporation, the lee model was chosen.

Hope it help.

(However, I've not finished model evaporation because some modifications are needed so I've still fixed this problem like you.)

July 27, 2022, 06:50	Drying modeling radiation and convection	#1
julia231199 New Member julia Join Date: Jul 2022 Posts: 1 Rep Power: 0	Hi, I need to model the mass and heat transfer of a thin (1cm) layer of water. The heat source is an IR heater that is siting 10 cm above the layer and air is flowing between the water layer and the heater. see sketch . How can I begin to model this? I want to know how long it takes for the water to fully evaporate. I have the flux and temperature of the heater and the air conditions/velocity. ANSYS.PNG Thank you in advance, Julia

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July 30, 2022, 10:27		#2
Kasidit New Member BestIELTS Join Date: Aug 2021 Posts: 10 Rep Power: 5	Hello Julia, I've simulated a water evaporation model like you. As far as I know, we need to consider one of the multiphase models (VOF, mixture, and Eulerian). Phase 1 consists of air and water-vapor while phase 2 consists of water-liquid. To model evaporation, the lee model was chosen. Hope it help. (However, I've not finished model evaporation because some modifications are needed so I've still fixed this problem like you.)