Effect of inside heated cylinder on the natural convection heat transfer of nanofluids in a wavy-wall enclosure

•Natural convection heat transfer of nanofluids in a wavy-wall enclosure is studied.•Finite element method (FEM) has been employed to solve the governing equations.•A heated cylinder is located in the cavity.•Effects of center location for cylinder on the Nusselt numbers are investigated. In this st...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2016-12, Vol.103, p.1053-1057
Main Authors: Hatami, M., Safari, H.
Format: Article
Language:English
Subjects:
FEM
Heated cylinder
Nanofluid
Nusselt number
Wavy-wall cavity
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Summary:•Natural convection heat transfer of nanofluids in a wavy-wall enclosure is studied.•Finite element method (FEM) has been employed to solve the governing equations.•A heated cylinder is located in the cavity.•Effects of center location for cylinder on the Nusselt numbers are investigated. In this study, natural convection heat transfer of nanofluids in a wavy-wall enclosure is studied while a heated cylinder is located inside the cavity. The governing equations for a simple cavity are studied based on the previous work and changed it to complicated two-phase nanofluid and solved by finite element method (FEM). Because the location on inside cylinder has a significant effect on the heat transfer and Nusselt number, it is important to find the best location for this cylinder. In our study the cylinder is movable in X and Y directions which affects the temperatures, stream lines and nanoparticles concentration contours. The results indicate that center location for the cylinder assists the heat transfer in both wavy side walls.
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2016.08.029