Perturbation Solution for Flow in Two-Cavity Dies

[+] Author and Article Information
K. J. Ruschak, S. J. Weinstein

Manufacturing Research and Engineering Organization, Eastman Kodak Company, Rochester, NY 14652-3701

J. Fluids Eng 119(4), 1003-1008 (Dec 01, 1997) (6 pages) doi:10.1115/1.2819488 History: Received September 05, 1996; Revised May 05, 1997; Online January 22, 2008


Dies having two distribution cavities and slots are sometimes used in film-forming applications demanding high uniformity. The flow distribution in the primary slot is evened by the secondary cavity and slot. The flow equations for such a die are solved in closed form for coat-hanger and T-shaped dies by a perturbation method. Limiting cases of the solutions reveal the operating mechanism, and the use of the solutions in a design problem is demonstrated.

Copyright © 1997 by The American Society of Mechanical Engineers
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