Title: Plasto-hydrodynamic pressure distribution in an exponentially converging coating unit

Authors: S. Akter, M.S.J. Hashmi

Addresses: School of Mechanical & Manufacturing Engineering, Dublin City University, Dublin 9, Ireland. ' School of Mechanical & Manufacturing Engineering, Dublin City University, Dublin 9, Ireland

Abstract: Hydrodynamic coating is a process, whereby a metal continuum is coated by passing it through a hydrodynamic pressure unit filled with polymer melt. The geometry of the pressure unit is always converging. Theoretical analysis have been found in literature to predict the pressure distribution in stepped parallel bore, tapered bore or combined parallel and tapered bore units. In this paper a mathematical model has been developed for the pressure distribution within a exponentially converging hydrodynamic coating unit. Theoretical results are obtained for different continuum speeds in terms of the changes in viscosity, shear stress and pressure distributions within the unit.

Keywords: coating units; hydrodynamic coating; plastohydrodynamic pressure; pressure distribution; polymer melt; mathematical modelling; continuum speed; viscosity; shear stress.

DOI: 10.1504/IJMPT.1998.036247

International Journal of Materials and Product Technology, 1998 Vol.13 No.3/4/5/6, pp.384 - 399

Published online: 01 Nov 2010 *

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