SIMULTANEOUS HEAT AND MASS TRANSFER IN POLYMER SOLUTIONS EXPOSED TO INTERMITTENT INFRARED RADIATION HEATING

Abstract

A theoretical study is performed that describes heat transfer and moisture variation while a polymer solution is exposed to high-intensity infrared radiation flux and/or an airflow. While the intermittent heating is considered, we investigate the influences of various radiation and convection parameters on the transfer of heat and moisture variation of coated layers on an optically thick substrate. During the tempering stage in the intermittent heating process, the convective mass transfer is included to simulate the ambient air in reality. The effects of radiation and convection parameters on the transfer processes are presented in terms of the rate of water content removal, heat transfer, and moisture distributions. Numerical results show that the rate of water removal from the polymer solution is dominated by both the absorbed radiative heat energy and the distributions of water mass fraction in the polymer solution.

Notes

Address correspondence to Jenn-Der Lin, Department of Mechanical Engineering, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu, Taiwan 30050, R.O.C.