Journal
APPLIED MATHEMATICAL MODELLING
Volume 82, Issue -, Pages 72-90Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.apm.2019.12.018
Keywords
Arbitrary Lagrangian-Eulerian (ALE); Fluid-structure interaction (FSI); Oscillating flexible fin; Unsteady mixed convection
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This study investigated the effects of two oscillating fins on the heat transfer rate and flow characteristics of a nanofluid inside a square enclosure. Both fins were attached to the hot wall and both fins oscillated at the same frequencies and amplitudes. The finite element method implemented in the arbitrary Lagrangian-Eulerian (ALE) technique was used to solve the equations describing the interactions and movements of the nanofluid and fins. Comparisons of our results and those reported in previous studies demonstrated that the modeling and numerical investigations were valid and reliable. The results showed that the increase in the heat transfer rate was due to the oscillation of the fins. In addition, the increasing trend in the heat transfer rate due to the oscillating fins decreased as the ratio of the thermal conductivity of the fins relative to the nanofluid increased. Increasing the thermal conductivity and viscosity parameters enhanced and weakened the heat transfer rate, respectively. (C) 2019 Elsevier Inc. All rights reserved.
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