Mixed-convection flow and heat transfer in an inclined cavity equipped to a hot obstacle using nanofluids considering temperature-dependent properties
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Author list: Hemmat Esfe M., Akbari M., Karimipour A., Afrand M., Mahian O., Wongwises S.
Publisher: Elsevier
Publication year: 2015
Journal: International Journal of Heat and Mass Transfer (0017-9310)
Volume number: 85
Start page: 656
End page: 666
Number of pages: 11
ISSN: 0017-9310
eISSN: 1879-2189
Languages: English-Great Britain (EN-GB)
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Abstract
Mixed-convection fluid flow and heat transfer in a square cavity filled with Al2O3-water nanofluid have been numerically investigated using the finite volume method (FVM) and SIMPLER algorithm. The geometry is a lid-driven square enclosure with an interior rectangular heated obstacle. The bottom, top, and left walls are adiabatic while the right wall has a constant low temperature (Tc). The upper lid of the cavity moves in a positive direction. Effects of different key parameters such as Richardson number, position and height of the block, the volume fraction of the nanoparticles, and cavity inclination angles on the fluid flow and heat transfer inside the cavity are investigated. It is observed that the average Nusselt number for all ranges of solid volume fraction increases with a decrease in the Richardson number. The results elucidate irregular changes of mean Nusselt number at different Richardson numbers versus variation of inclination angles in any case. ฉ 2015 Elsevier Ltd. All rights reserved.
Keywords
Al2O3-water nanofluid, Hot obstacle, Lid-driven cavity, Numerical Simulation
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