Citation

Lim, Elaine and Hung, Yew Mun (2019) Long-wave evolution model of thermocapillary convection in an evaporating thin film of pseudoplastic fluids. International Journal of Numerical Methods for Heat & Fluid Flow. ISSN 0961-5539

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Abstract

Purpose By solving a long-wave evolution model numerically for power-law fluids, the authors aim to investigate the hydrodynamic and thermal characteristics of thermocapillary flow in an evaporating thin liquid film of pseudoplastic fluid. Design/methodology/approach The flow reversal attributed to the thermocapillary action is manifestly discernible through the streamline plots. Findings The thermocapillary strength is closely related to the viscosity of the fluid, besides its surface tension. The thermocapillary flow prevails in both Newtonian and pseudoplastic fluids at a large Marangoni number and the thermocapillary effect is more significant in the former. The overestimate in the Newtonian fluid is larger than that in the pseudoplastic fluid, owing to the shear-thinning characteristics of the latter. Originality/value This study provides insights into the essential attributes of the underlying flow characteristics in affecting the thermal behavior of thermocapillary convection in an evaporating thin liquid film of the shear-thinning fluids.

Item Type:	Article
Uncontrolled Keywords:	Fluids, Evaporating thin film, Long-wave evolution model, Pseudoplastic fluid, Thermocapillary convection
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN799.5-948 Nonmetallic minerals
Divisions:	Faculty of Engineering and Technology (FET)
Depositing User:	Ms Suzilawati Abu Samah
Date Deposited:	09 Feb 2022 02:37
Last Modified:	09 Feb 2022 02:37
URII:	http://shdl.mmu.edu.my/id/eprint/9097

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