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 language | English |
|---|---|
| Article number | 509 |
| Journal | European Physical Journal Plus |
| Volume | 132 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 1 Dec 2017 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
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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 journal › Article
}
TY - JOUR
T1 - Natural convection in a differentially heated enclosure having two adherent porous blocks saturated with a nanofluid
AU - Astanina, Marina S.
AU - Sheremet, Mikhail A.
AU - Oztop, Hakan F.
AU - Abu-Hamdeh, Nidal
PY - 2017/12/1
Y1 - 2017/12/1
N2 - 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.
AB - 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.
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U2 - 10.1140/epjp/i2017-11769-0
DO - 10.1140/epjp/i2017-11769-0
M3 - Article
VL - 132
JO - European Physical Journal Plus
JF - European Physical Journal Plus
SN - 2190-5444
IS - 12
M1 - 509
ER -