Effect of Elasticity on Viscoplastic Flow
Keyword(s):
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.
2017 ◽
Vol 232
(13)
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pp. 2394-2403
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2008 ◽
Vol 26
(8)
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pp. 2217-2228
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2009 ◽
Vol 131
(12)
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pp. 124114
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2018 ◽
Vol 149
(16)
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pp. 164109
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2016 ◽
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