EFFECT OF ELASTICITY ON VISCOPLASTIC FLOW

Conference proceedings article

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Author list: Letelier MF, Diaz N, Siginer D, Baez E

Publisher: AMER SOC MECHANICAL ENGINEERS

Place: NEW YORK

Publication year: 2017

Number of pages: 4

ISBN: 978-0-7918-5061-9

Languages: English-Great Britain (EN-GB)

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Abstract

The effect of superimposing elasticity on a viscoplastic fluid (elasto-viscoplastic fluid) is investigated through a linear combination of the simplified Phan-Thien Tanner (SPIT) model of viscoelasticity and Bingham model of viscoplastic fluid. The equation of motion is solved for the case of parallel steady flow in tubes of non-circular cross-sections. The effect of elasticity on the evolution of plug and stagnant zones, and rate of flow in terms of the Weissenberg number, a material parameter in the SPIT model, and the Bingham number is investigated. We find that elasticity tends to enhance the rate of flow for given viscoplastic conditions.

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