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Effect of Elasticity on Viscoplastic Flow

[+] Author Affiliations
Mario F. Letelier, Nicolás Díaz, Dennis Siginer, Ercio Báez

University of Santiago of Chile, Santiago, Chile

Paper No. IMECE2016-65025, pp. V007T09A020; 4 pages
doi:10.1115/IMECE2016-65025
From:
  • ASME 2016 International Mechanical Engineering Congress and Exposition
  • Volume 7: Fluids Engineering
  • Phoenix, Arizona, USA, November 11–17, 2016
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5061-9
  • Copyright © 2016 by ASME

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 (SPTT) 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 SPTT model, and the Bingham number is investigated. We find that elasticity tends to enhance the rate of flow for given viscoplastic conditions.

Copyright © 2016 by ASME

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