Experimental and numerical study on heat transfer enhancement of flat tube radiator using Al2O3 and CuO nanofluids

Alosious, Sobin; Sarath, S; Nair, Anjan R; Krishnakumar, K.

doi:10.1007/s00231-017-2061-0

Cited by 39 publications

(12 citation statements)

References 19 publications

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“…By experiments and numerical simulations, Alosious et al 27 used Al 2 O 3 ‐water and CuO‐water nanofluids with 0.05% of volume concentrations in a flattened tube of an automobile radiator. The maximum heat transfer enhancement and stability were obtained with Al 2 O 3 nanofluids, compared with CuO nanofluids.…”

Section: Nanofluid Transport Under Laminar Flow Regimementioning

confidence: 99%

Advances of nanofluids in heat exchangers—A review

Menni

Chamkha

Ameur³

2020

Heat Trans

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Recently, many researchers have focused on their studies on the analysis of nanofluid flows due to their participation in the enhancement of heat transfer rates in industrial processes. The ordinary fluids, such as water, mineral oils, and so on, are known for their low thermal conductivity in heat transfer processes. A significant enhancement in the thermal properties of ordinary fluid may be obtained by adding nanoparticles having a diameter of less than 100 nm or suspension of fibers. Better spreading, wetting, dispersion, and stability and with acceptable viscosity are the main advantageous properties of nanofluids on a solid surface. The nanofluids are encountered in various thermal engineering systems such as in heat exchangers, refrigeration, thermal management of fuel cells, cooling of nuclear reactors, microelectromechanical systems, and others. In particular, the thermal conversion is known as a great application of nanotechnology, and many studies have been achieved with such fluids in heat exchangers. Therefore, this paper aims to present a global insight into the different applications of nanofluids in various heat exchangers, that is, heat pipe and plate-fin heat exchangers. All research works have been summarized into three main parts: laminar, transition, and turbulent nanofluid flow regimes.

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Section: Nanofluid Transport Under Laminar Flow Regimementioning

confidence: 99%

Advances of nanofluids in heat exchangers—A review

Menni

Chamkha

Ameur³

2020

Heat Trans

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“…Cases with 0, 1 and 3% of nanoparticle concentration were considered. It has been shown recently [56] that numerical experiments using continuous models over-predict the heat transfer enhancement. Our validation and comparison of the numerical results against experimental finding of nanofluid heat transfer followed the cells presentation as in [21].…”

Section: Validation -Vs-experimental Resultsmentioning

confidence: 99%

Combined Newton-Raphson and Streamlines-Upwind Petrov-Galerkin iterations for nano-particles transport in buoyancy driven flow

Riahi¹,

Ali²,

Addad³

et al. 2021

Preprint

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The present study deals with the finite element discretization of nanofluid convective transport in an enclosure with variable properties. We study the Buongiorno model, which couples the Navier-Stokes equations for the base fluid, an advective-diffusion equation for the heat transfer, and an advection dominated nanoparticle fraction concentration subject to thermophoresis and Brownian motion forces. We develop an iterative numerical scheme that combines Newton's method (dedicated to the resolution of the momentum and energy equations) with the transport equation that governs the nanoparticles concentration in the enclosure. We show that Stream Upwind Petrov-Galerkin regularization approach is required to solve properly the ill-posed Buongiorno transport model being tackled as a variational problem under mean value constraint. Non-trivial numerical computations are reported to show the effectiveness of our proposed numerical approach in its ability to provide reasonably good agreement with the experimental results available in the literature. The numerical experiments demonstrate that by accounting for only the thermophoresis and Brownian motion forces in the concentration transport equation, the model is not able to reproduce the heat transfer impairment due to the presence of suspended nanoparticles in the base fluid. It reveals, however, the significant role that these two terms play in the vicinity of the hot and cold walls.

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“…Commercial Al 2 O 3 nanoparticles purchased from (Sigma‐Aldrich GmbH) with 99.99% of purify with a 50 nm average diameter of were deposited in the base fluid. The selection of aluminum oxide nanofluid is due to its higher effective thermal conductivity, lower density, which also reduces the sedimentation due its superiority of Brownian motion 40 . Sodium dodecyl benzene, sulfonate (SDBS) was utilized as a natural surfactant for dispersion of Al 2 O 3 through the base fluid which was distilled water (DW) and also to improve the stability of Al 2 O 3 /water nanofluid since SDBS offered the best stability level for Al 2 O 3 ‐water nanofluid 41 .…”

Section: Methodsmentioning

confidence: 99%

Performance enhancement of concentrator photovoltaic systems using nanofluids

et al. 2020

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In the current study, a newly developed low photovoltaic concentrator (LCPV) equipped with nanofluid-based cooling channels, directly contacting the rare LCPV, was examined in detail. Nanofluid acts as a coolant that flowing over the back of LCPV to maintain its optimal operating temperature with the best overall performance. The coolants used are water and aluminum oxide (Al 2 O 3)/water nanofluids 1%, 2%, and 3% by volume concentration. When circulating a 3%-Al 2 O 3 /water nanofluid, the temperature of the LCPV module is dropped by 16.47 C compared to the uncooled module and keeps its operating temperature under 45 C during the experimental tests. This reduction in the LCPV module temperature with V-trough reflector mirrors in turn increased its performance. The results revealed that the daily electrical output power of the uncooled LCPV module was 1646.85 W, whereas, was 1870.55 W with (13.58%) improvement with the case of water cooling. However, cooling with 3%-Al 2 O 3 /water nanofluid, the power output of the LPVC was 2319.88 W with (24.02%) and (40.86%) enhancement compared to pure water cooling and without cooling respectively. The rise in the volume fraction ratio of Al 2 O 3 nanoparticles remarkably decreases the operating temperature of the LCPV module and improves both electrical and thermal efficiency.

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Experimental and numerical study on heat transfer enhancement of flat tube radiator using Al2O3 and CuO nanofluids

Cited by 39 publications

References 19 publications

Advances of nanofluids in heat exchangers—A review

Advances of nanofluids in heat exchangers—A review

Combined Newton-Raphson and Streamlines-Upwind Petrov-Galerkin iterations for nano-particles transport in buoyancy driven flow

Performance enhancement of concentrator photovoltaic systems using nanofluids

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