Temperature-dependent shear-thinning Herschel–Bulkley fluid flow by taking into account viscous dissipation

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• 作者：Nabila Labsi ; Youb Khaled Benkahla…
• 关键词：Shear ; thinning Herschel–Bulkley fluid ; Viscous dissipation ; Temperature ; dependent consistency ; Uniform wall temperature ; Finite volume method
• 刊名：Journal of the Brazilian Society of Mechanical Sciences and Engineering
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：39
• 期：1
• 页码：267-277
• 全文大小：
• 刊物主题：Mechanical Engineering;
• 出版者：Springer Berlin Heidelberg
• ISSN：1806-3691
• 卷排序：39

文摘

The present numerical study deals with the analysis of hydrodynamic and thermal characteristics of a shear-thinning Herschel–Bulkley fluid flow within a pipe of a circular cross section, maintained at a uniform wall temperature. The governing equations of the studied steady problem are solved using a homemade computer code based on the finite volume method. The paper is focused on the consequences of neglecting the temperature dependency of the fluid’s consistency and/or the viscous dissipation on both pressure drop and heat transfer. The results show, indeed, that neglecting the temperature dependency of the fluid’s viscosity leads to significantly undervalue these parameters, especially when viscous dissipation is also missed. Abacuses depicting the friction factor of Fanning and the Nusselt number variations according to both Brinkman number and dimensionless temperature coefficient are proposed to sum up the study.