Abstract
Natural convection nanofluid heat transfer enhancement in a partially heated cavity is considered under the effect of an external Lorentz force exerted through interaction of the nanoparticles and the applied constant magnetic field. The aluminum oxide (Al2O3 or alumina) nanofluid is considered to be with variable properties (i.e. thermal conductivity, viscosity and electric conductivity) and the cavity is partially heated from its left top corner. The effect of the inclination angle of the applied magnetic field is studied and analyzed. The Nusselt number is calculated at the heater to probe the heat transfer enhancement. Both effective thermal and electric conductivities have been investigated in their respective theoretical and experimental correlations. Numerical experiments are presented to show the discrepancy in heat transfer with the use of such correlations. A substantial difference in the heat transfer is noticed for the use of different correlations. An adverse effect is identified and analyzed with the increase of Hartmann number, the nanoparticle volume fraction, and the position of the heater within the cavity.
| Original language | English |
|---|---|
| Pages (from-to) | 532-548 |
| Number of pages | 17 |
| Journal | International Journal of Heat and Mass Transfer |
| Volume | 116 |
| DOIs | |
| Publication status | Published - 1 Jan 2018 |
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Keywords
- Heat transfer enhancement
- Magnetohydrodynamics
- Nanofluid
- Natural convection
- Variable properties
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanical Engineering
- Fluid Flow and Transfer Processes
Cite this
Magnetohydrodynamic in partially heated square cavity with variable properties : Discrepancy in experimental and theoretical conductivity correlations. / Astanina, Marina S.; Kamel Riahi, Mohamed; Abu-Nada, Eiyad; Sheremet, Mikhail A.
In: International Journal of Heat and Mass Transfer, Vol. 116, 01.01.2018, p. 532-548.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Magnetohydrodynamic in partially heated square cavity with variable properties
T2 - Discrepancy in experimental and theoretical conductivity correlations
AU - Astanina, Marina S.
AU - Kamel Riahi, Mohamed
AU - Abu-Nada, Eiyad
AU - Sheremet, Mikhail A.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Natural convection nanofluid heat transfer enhancement in a partially heated cavity is considered under the effect of an external Lorentz force exerted through interaction of the nanoparticles and the applied constant magnetic field. The aluminum oxide (Al2O3 or alumina) nanofluid is considered to be with variable properties (i.e. thermal conductivity, viscosity and electric conductivity) and the cavity is partially heated from its left top corner. The effect of the inclination angle of the applied magnetic field is studied and analyzed. The Nusselt number is calculated at the heater to probe the heat transfer enhancement. Both effective thermal and electric conductivities have been investigated in their respective theoretical and experimental correlations. Numerical experiments are presented to show the discrepancy in heat transfer with the use of such correlations. A substantial difference in the heat transfer is noticed for the use of different correlations. An adverse effect is identified and analyzed with the increase of Hartmann number, the nanoparticle volume fraction, and the position of the heater within the cavity.
AB - Natural convection nanofluid heat transfer enhancement in a partially heated cavity is considered under the effect of an external Lorentz force exerted through interaction of the nanoparticles and the applied constant magnetic field. The aluminum oxide (Al2O3 or alumina) nanofluid is considered to be with variable properties (i.e. thermal conductivity, viscosity and electric conductivity) and the cavity is partially heated from its left top corner. The effect of the inclination angle of the applied magnetic field is studied and analyzed. The Nusselt number is calculated at the heater to probe the heat transfer enhancement. Both effective thermal and electric conductivities have been investigated in their respective theoretical and experimental correlations. Numerical experiments are presented to show the discrepancy in heat transfer with the use of such correlations. A substantial difference in the heat transfer is noticed for the use of different correlations. An adverse effect is identified and analyzed with the increase of Hartmann number, the nanoparticle volume fraction, and the position of the heater within the cavity.
KW - Heat transfer enhancement
KW - Magnetohydrodynamics
KW - Nanofluid
KW - Natural convection
KW - Variable properties
UR - http://www.scopus.com/inward/record.url?scp=85029638812&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85029638812&partnerID=8YFLogxK
U2 - 10.1016/j.ijheatmasstransfer.2017.09.050
DO - 10.1016/j.ijheatmasstransfer.2017.09.050
M3 - Article
VL - 116
SP - 532
EP - 548
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
SN - 0017-9310
ER -