Entropy Generation in Multicomponent Reacting Flows

[+] Author and Article Information
H. Teng

National Institute of Materials and Chemical Research, Agency of Industrial Science and Technology, MITI, Japan

C. M. Kinoshita

Biosystems Engineering Department, University of Hawaii at Manoa, 3050 Maile Way, Gilmore 111, Honolulu, Hawaii 96822; also, Hawaii Natural Energy Institute, University of Hawaii at Manoa, Honolulu, HI

S. M. Masutani, J. Zhou

Hawaii Natural Energy Institute, University of Hawaii at Manoa, Honolulu, HI

J. Energy Resour. Technol 120(3), 226-232 (Sep 01, 1998) (7 pages) doi:10.1115/1.2795040 History: Received November 24, 1997; Revised April 10, 1998; Online November 06, 2007


A comprehensive equation to determine the rate of local entropy generation in multicomponent, reacting, laminar fluid flow involving heat and mass transfer is formulated based on species-average velocity in a multicomponent continuum. The entropy-generation equation developed in this study suggests that species diffusion induces a diffusive-viscous effect, heretofore not reported in the literature, which could contribute significantly to entropy generation in multicomponent fluid systems, and that entropy generation in a multicomponent system exceeds that in a single-component fluid system having similar velocity and temperature distributions because a greater number of irreversible processes, such as species diffusion, chemical reaction, and the Soret and Dufour effects, are involved. Under appropriate conditions, if the diffusive-viscous effect is neglected, the entropy-generation equation of this study reduces to those reported in the literature for simpler fluid systems based on mean flow.

Copyright © 1998 by The American Society of Mechanical Engineers
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