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Special Topics & Reviews in Porous Media: An International Journal
ESCI SJR: 0.259 SNIP: 0.466 CiteScore™: 0.83

ISSN Druckformat: 2151-4798
ISSN Online: 2151-562X

Special Topics & Reviews in Porous Media: An International Journal

DOI: 10.1615/SpecialTopicsRevPorousMedia.v4.i4.10
pages 287-297

FREE CONVECTION IN H-SHAPED ENCLOSURES FILLED WITH A POROUS MEDIUM SATURATED WITH NANOFLUIDS WITH MOUNTED HEATERS ON THE VERTICAL WALLS

M. A. Mansour
Department of Mathematics, Assuit University, Faculty of Science, Assuit, Egypt
Sameh Elsayed Ahmed
Department of Mathematics, Faculty of Science, Abha, King Khalid University, Saudi Arabia; Department of Mathematics, Faculty of Science, South Valley University, Qena, Egypt
M. A. Y. Bakier
Department of Mathematics, Faculty of Sciences, Assiut University, Assiut, Egypt

ABSTRAKT

Natural convection fluid flow and heat transfer inside H-shaped enclosures filled with nanofluid has been investigated numerically using the finite difference method. The governing parameters considered are the Rayleigh number (50 ≤ Ra ≤ 1000), the aspect ratio of the H-shaped enclosure (0.2 ≤ AR ≤ 0.8), the different lengths of the heat source (0.2 ≤ B ≤ 0.8), the different locations of the heat source (0.2 ≤ D ≤ 0.5), the volume fraction of the nanoparticles (0 ≤ Φ ≤ 0.1), and the different types of nanoparticles (Cu, Ag, Al2O3, and TiO2). It is found that the mean Nusselt number increases with an increase in Rayleigh number and regardless of the aspect ratio of the enclosure. Also at low Rayleigh numbers, the effect of Cu nanoparticles on enhancement of the heat transfer for narrow enclosures was found to be more than that for wide enclosures.


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