Integral analysis of condensation in a paper drum with a scraper |
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Authors: | M K Zhong K Mizukami |
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Institution: | (1) Department of Mechanical Engineering Ehime University 3 Bunkyo-cho, Matsuyama, 790 Japan, JP |
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Abstract: | An integral analysis is made for laminar film condensation in a rotating paper drum with a scraper. The analysis includes
the nonlinear inertial terms in the equation of motion, with the interface shear stress being considered. The results of numerical
solutions show that the inertial terms cannot be neglected except in the cases of a very thin condensate film or a very large
Froude number, that the condensation heat transfer will be, to some extent, enhanced by the inertial effect, and that the
vapor shear at the vapor-liquid interface proves to be negligible. Distributions of the interface velocity and film thickness
as well as heat transfer results are obtained and discussed. Included also in this paper is the investigation for transition
of the condensate flow from steady state to unsteady one.
Received on 6 December 1996 |
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