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RESEARCH PAPERS: Materials Processing

Coupled Heat and Mass Transfer With One Discrete Sublimation Moving Interface and One Desorption Mushy Zone

[+] Author and Article Information
Shi-Wen Peng

Department of Power Engineering, Huazhong University of Science & Technology, Wuhan, Hubei, 430074, People’s Republic of China

Guo-Qian Chen

Department of Mechanics, Peking University, Beijing, 100871, People’s Republic of China

J. Heat Transfer 116(1), 215-220 (Feb 01, 1994) (6 pages) doi:10.1115/1.2910858 History: Received October 01, 1992; Revised June 01, 1993; Online May 23, 2008

Abstract

The present work discusses coupled heat and mass transfer during freeze-drying of a rigid product, as well as accelerated freeze-drying where sublimation and desorption occur concurrently. A desorption mushy zone model was developed to describe the desorption drying. An exact solution was obtained for coupled heat and mass transfer with one discrete sublimation moving interface and one desorption mushy zone where mass transfer is controlled by both Fick and Darcy laws. The effects of several parameters on the sublimation and desorption are analyzed and discussed.

Copyright © 1994 by The American Society of Mechanical Engineers
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