Natural convection in a differentially heated enclosure having two adherent porous blocks saturated with a nanofluid

Marina S. Astanina, Mikhail A. Sheremet, Hakan F. Oztop, Nidal Abu-Hamdeh

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Laminar natural convection in a square cavity having two centered adherent porous blocks filled with an alumina/water nanofluid under the effect of horizontal temperature gradient is studied numerically. Each porous block has the unique values of the porosity and permeability. Water-based nanofluids with alumina nanoparticles are chosen for investigation. The control characteristics of this study are the Darcy number of the first porous block (10 - 7≤ Da1≤ 10 -3), the dimensionless porous blocks size (0. 1 ≤ δ≤ 0. 4) and nanoparticles volume fraction (0 ≤ ϕ≤ 0. 04). The developed computational code has been validated comprehensively using the grid independency test and experimental data of other authors. The obtained results revealed the heat transfer enhancement at the hot wall with the Darcy number, while a growth of the porous layers size reduces the heat transfer rate at this hot wall. The behavior of the average Nusselt number at the right cold wall is opposite.

Original languageEnglish
Article number509
JournalEuropean Physical Journal Plus
Volume132
Issue number12
DOIs
Publication statusPublished - 1 Dec 2017

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enclosure
free convection
aluminum oxides
heat transfer
cold walls
nanoparticles
Nusselt number
water
temperature gradients
permeability
grids
porosity
cavities
augmentation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Natural convection in a differentially heated enclosure having two adherent porous blocks saturated with a nanofluid. / Astanina, Marina S.; Sheremet, Mikhail A.; Oztop, Hakan F.; Abu-Hamdeh, Nidal.

In: European Physical Journal Plus, Vol. 132, No. 12, 509, 01.12.2017.

Research output: Contribution to journalArticle

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