Computational analysis of non-isothermal temperature distribution on natural convection in nanofluid filled enclosures

Hakan F. Oztop; Eiyad Abu-Nada; Yasin Varol; Khaled Al-Salem

doi:10.1016/j.spmi.2011.01.002

Computational analysis of non-isothermal temperature distribution on natural convection in nanofluid filled enclosures

Hakan F. Oztop, Eiyad Abu-Nada, Yasin Varol, Khaled Al-Salem

Mechanical & Nuclear Engineering

Research output: Contribution to journal › Article › peer-review

92 Scopus citations

Abstract

In this study, the problem of steady state natural convection in an enclosure filled with a nanofluid has been analyzed numerically by using heating and cooling by sinusoidal temperature profiles on one side. The governing partial differential equations, in terms of the dimensionless stream functionvorticity and temperature, are solved numerically using the finite volume method for various inclination angles 0^°≤φ≤ 90^°, different types of nanoparticles (TiO₂ and Al₂O₃) and fractions of nanoparticles 0≤φ≤0.1, whereas the range of the Rayleigh number Ra is 10³10⁵. It is found that the addition of nanoparticles into water affects the fluid flow and temperature distribution especially for higher Rayleigh numbers. An enhancement in heat transfer rate was registered for the whole range of Rayleigh numbers. However, low Rayleigh numbers show more enhancement compared to high Rayleigh numbers.

Original language	British English
Pages (from-to)	453-467
Number of pages	15
Journal	Superlattices and Microstructures
Volume	49
Issue number	4
DOIs	https://doi.org/10.1016/j.spmi.2011.01.002
State	Published - Apr 2011

Keywords

Enclosure
Nanofluid
Natural convection

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10.1016/j.spmi.2011.01.002

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abstract = "In this study, the problem of steady state natural convection in an enclosure filled with a nanofluid has been analyzed numerically by using heating and cooling by sinusoidal temperature profiles on one side. The governing partial differential equations, in terms of the dimensionless stream functionvorticity and temperature, are solved numerically using the finite volume method for various inclination angles 0°≤φ≤ 90°, different types of nanoparticles (TiO2 and Al2O3) and fractions of nanoparticles 0≤φ≤0.1, whereas the range of the Rayleigh number Ra is 103105. It is found that the addition of nanoparticles into water affects the fluid flow and temperature distribution especially for higher Rayleigh numbers. An enhancement in heat transfer rate was registered for the whole range of Rayleigh numbers. However, low Rayleigh numbers show more enhancement compared to high Rayleigh numbers.",

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AU - Abu-Nada, Eiyad

AU - Varol, Yasin

AU - Al-Salem, Khaled

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N2 - In this study, the problem of steady state natural convection in an enclosure filled with a nanofluid has been analyzed numerically by using heating and cooling by sinusoidal temperature profiles on one side. The governing partial differential equations, in terms of the dimensionless stream functionvorticity and temperature, are solved numerically using the finite volume method for various inclination angles 0°≤φ≤ 90°, different types of nanoparticles (TiO2 and Al2O3) and fractions of nanoparticles 0≤φ≤0.1, whereas the range of the Rayleigh number Ra is 103105. It is found that the addition of nanoparticles into water affects the fluid flow and temperature distribution especially for higher Rayleigh numbers. An enhancement in heat transfer rate was registered for the whole range of Rayleigh numbers. However, low Rayleigh numbers show more enhancement compared to high Rayleigh numbers.

AB - In this study, the problem of steady state natural convection in an enclosure filled with a nanofluid has been analyzed numerically by using heating and cooling by sinusoidal temperature profiles on one side. The governing partial differential equations, in terms of the dimensionless stream functionvorticity and temperature, are solved numerically using the finite volume method for various inclination angles 0°≤φ≤ 90°, different types of nanoparticles (TiO2 and Al2O3) and fractions of nanoparticles 0≤φ≤0.1, whereas the range of the Rayleigh number Ra is 103105. It is found that the addition of nanoparticles into water affects the fluid flow and temperature distribution especially for higher Rayleigh numbers. An enhancement in heat transfer rate was registered for the whole range of Rayleigh numbers. However, low Rayleigh numbers show more enhancement compared to high Rayleigh numbers.

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Computational analysis of non-isothermal temperature distribution on natural convection in nanofluid filled enclosures

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