Assisted convective heat transfer and entropy generation in a solar collector filled with nanofluid

Nasrin, Rehena; Алим, М. А.; Hasanuzzzaman, M.

doi:10.3329/jname.v13i2.27774

Cited by 5 publications

(2 citation statements)

References 24 publications

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“…Te base fuids are used to compare the fndings obtained using both the theoretical models and the novel correlations to determine the diference between utilizing nanoparticles to enhance thermophysical properties and not using them. Veera Krishna [9] Water Aluminum copper 0.05%, 0.1%, 0.15% Raising the Prandtl number decreased the temperature and thickness of the boundary layer [9] Zargartalebi et al [10] When the Prandtl number increased, a reduction in the thickness of the thermal boundary layer was noticed [10] Nasrin [11] Water Aluminum oxide 2% Te rise in the Prandtl number enhanced the heat transfer rate, but it decreased the collector's efciency [11] Nabil et al [12] Water/ethylene glycol (60 : 40) Titanium oxide-silicon dioxide (50 : 50) 0.5% to 3.0% With an increase in temperature, viscosity was shown to diminish [12] Yu et al [13] Water MWCNT 0.0047%, 0.023%, 0.0571%, 0.1428%, and 0.2381% Results indicated a small increase in viscosity when temperature rose over the critical threshold [13] Shah et al […”

Section: Viscosity and Prandtl Number's Base Fluid Properties Andmentioning

confidence: 99%

Prandtl Number and Viscosity Correlations of Titanium Oxide Nanofluids

Mlangeni,

Huan,

Sithebe

et al. 2023

Journal of Engineering

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Many features of nanofluids, such as the Prandtl number and viscosity, are researched as the number of studies conducted in the field of nanofluids increases. Observations on the Prandtl number and viscosity of titanium oxide nanofluids are made in this study. These observations are made at low concentrations of titanium oxide nanoparticles and temperatures ranging from 30.4°C to 70.4°C. Novel correlations for viscosity and Prandtl number as functions of temperature have been developed and compared to the previously published models for Prandtl number and viscosity. The results indicate that titanium oxide-ethylene glycol nanofluid has a greater viscosity and Prandtl number than all other titanium oxide nanofluids observed in the study at 0.01 nanoparticle concentration. The results on viscosity and Prandtl number for the new correlations fall within the same range as those found in the literature, indicating that the new correlations introduced as functions of temperature in this study can be used in future research to establish viscosity and Prandtl number calculations for the different types of nanofluids at specific temperatures.

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Section: Viscosity and Prandtl Number's Base Fluid Properties Andmentioning

confidence: 99%

Prandtl Number and Viscosity Correlations of Titanium Oxide Nanofluids

Mlangeni,

Huan,

Sithebe

et al. 2023

Journal of Engineering

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“…Nanofluid is a new kind of heat transfer medium, containing nanoparticles (1-100 nm) which are uniformly and stably distributed in a base fluid. These distributed nanoparticles, generally a metal or metal oxide greatly enhance the thermal conductivity of the nanofluid, increases conduction and convection coefficients, allowing for more heat transfer [3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Heat-Mass Transfer of Nanofluid in Lid-Driven Enclosure under three Convective Modes

Ms¹,

Nasrin

Hoque³

2019

GANIT: J. Bangladesh Math. Soc.

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Heat is a form of energy which transfers between bodies which are kept under thermal interactions. When a temperature difference occurs between two bodies or a body with its surroundings, heat transfer occurs. Heat transfer occurs in three modes. Three modes of heat transfer are conduction, convection and radiation. Convection is a very important phenomenon in heat transfer applications and it occurs due to two different gradients, such as, temperature and concentration. This paper reports a numerical study on forced-mixed-natural convections within a lid-driven square enclosure, filled with a mixture of water and 2% concentrated Cu nanoparticles. It is assumed that the temperature difference driving the convection comes from the side moving walls, when both horizontal walls are kept insulated. In order to solve general coupled equations, a code based on the Galerkin's finite element method is used. To make clear the effect of using nanofluid on heat and mass transfers inside the enclosure, a wide range of the Richardson number, taken from 0.1 to 10 is studied. A fair degree of precision can be found between the present and previously published works. The phenomenon is analyzed through streamlines, isotherm and iso-concentration plots, with special attention to the Nusselt number and Sherwood number. The larger heat and mass transfer rates can be achieved with nanofluid than the base fluid for all conditions at Richardson number, Ri = 0.1 to 10. It has been found that the heat and mass transfer rate increase approximately 6% for water with the increase of Ri = 0.1 to 10, whereas these increase about 34% for nanofluid. GANIT J. Bangladesh Math. Soc.Vol. 38 (2018) 73-83

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