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Heat Transfer Research
Fator do impacto: 0.404 FI de cinco anos: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Imprimir: 1064-2285
ISSN On-line: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2018019878
pages 1231-1246

UNSTEADY CONVECTION HEAT AND MASS TRANSFER OF A FRACTIONAL OLDROYD-B FLUID WITH CHEMICAL REACTION AND HEAT SOURCE/SINK EFFECT

Jinhu Zhao
School of Mathematics and Statistics, Fuyang Normal College, Fuyang 236037, Anhui, China
Liancun Zheng
School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
Xinxin Zhang
School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China; Beijing Key Laboratory of Energy Saving and Emission Reduction for Metallurgical Industry, University of Science and Technology Beijing, Beijing 100083, China
Fawang Liu
School of Mathematical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Qld. 4001, Australia

RESUMO

This paper studies unsteady convection heat and mass transfer of a fractional Oldroyd-B fluid in the presence of chemical reaction and heat source/sink. Nonlinear coupled governing equations with time−space derivatives are derived and solved numerically. The effects of involved parameters on velocity, temperature, and concentration fields are analyzed. The results show that fractional derivative parameters have a remarkable influence on the viscoelastic properties of the fluid and play an opposite role in the boundary layer. With increase of the buoyancy ratio number, the velocity distributions rise, but the temperature distributions decline. Moreover, the heat source generates energy causing the temperature of the fluid to increase, while the heat sink absorbs energy which leads to the decrease of the temperature. Chemical reaction reduces the concentration boundary-layer thickness and improves the rate of mass transfer.


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