Heat Transfer of Crude Waxy Oil with Yield Stress in a Pipe
Zhapbasbayev U. Bekibayev T. Pakhomov M. Ramazanova G.
September 2024Multidisciplinary Digital Publishing Institute (MDPI)
Energies
2024#17Issue 18
This article is devoted to the study of heat exchange of a heated flow of waxy oil in a pipe. Heat exchange between the waxy oil flow and the surrounding environment decreases the oil temperature and sharply increases the rheological properties. The appearance of a solid-like region within the yield-stress fluid flow is a non-trivial problem. This flow property greatly complicates the numerical solution of the system of equations governing the flow and heat transfer of viscoplastic fluids. The Bingham–Papanastasiou model allows one to solve the problem by regularizing the formula for effective molecular viscosity. The novelty of this work lies in establishing the dependence of the Nusselt number on the Reynolds and Bingham numbers for the flow of viscoplastic fluid in a pipe. Via calculations, velocity, temperature, and pressure distributions in the flow were obtained for Bingham numbers ranging from 1.7 to 118.29 and Reynolds numbers ranging from 104 to 2615. The Nusselt number dependence increases with the increase in the Reynolds number and decreases with the decrease in the Bingham number along the pipe length.
Bingham–Papanastasiou model , crude waxy oil , heat transfer , Nusselt number
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Scientific Laboratory “Energy Modeling”, Satbayev University, Almaty, 050013, Kazakhstan
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, 630090, Russian Federation
Scientific Laboratory “Energy Modeling”
Kutateladze Institute of Thermophysics SB RAS
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