Drying modeling radiation and convection

julia231199 · July 27, 2022, 05:50

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, 09:27

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, 05:50	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

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Modeling Radiation and Natural Convection	itsme_kit	FLUENT	5	January 21, 2014 05:33
Modeling Radiation and Natural Convection	itsme_kit	ANSYS	0	January 20, 2014 10:55
Modeling both radiation and convection on surfaces - Ansys Transient Thermal R13	s.mishra	ANSYS	0	March 31, 2012 04:12
natural convection problem with radiation	jorien	CFX	0	October 14, 2011 09:26
Modeling radiation and natural convection tutorial	Amanda Fry	FLUENT	1	January 20, 2004 12:50

July 30, 2022, 09:27		#2
Kasidit New Member BestIELTS Join Date: Aug 2021 Posts: 10 Rep Power: 4	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.)