Effect of Nanofluid Flows on Heat Transfer Intensification of Corrugated Channels with an Oscillating Blade

Hekmat, Mohamad Hamed; Saharkhiz, Saleh

doi:10.1016/j.cep.2022.109072

Cited by 6 publications

(2 citation statements)

References 45 publications

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“…15 Afrouzi et al 16 studied on a wide range of fluctuation amplitudes of pulsating flow in a corrugated channel by using the Lattice Boltzmann Method (LBM) and utilizing the Boundary Fitting Method (BFM). Hekmat and Saharkhiz 17 investigated heat transfer characteristics of Al2O3-water nanofluid inside a corrugated channel with a flat blade. Aroni et al 18 studied on numerical analysis of convective heat transfer of a corrugated channel for laminar flow of water nanofluid in the fully developed region.…”

Section: Introductionmentioning

confidence: 99%

LBM curved boundary treatments for pulsatile flow on convective heat transfer and friction factor in corrugated channels

Aslan,

Ozsaban,

Kucur

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The present research investigates heat transfer and the flow characteristics of periodically corrugated wavy channels numerically under pulsatile flow conditions. The numerical method used here is Lattice Boltzmann Method (LBM), and the validation of the study is done by Ansys-Fluent which is finite volume based commercial Computational Fluid Dynamics (CFD) code. For modeling walls, bounce-back method, namely, staircase method and three different curved boundary treatments, which are extrapolation, Filippova-Hänel (FH) and Mei-Luo-Shy (MLS), are used. For modeling constant temperature at walls, staircase method and the same curved wall treatments are used. Corrugated channels have a sharp wavy peak, and its inclination angle is 30°. Two different minimum channel heights are considered, which are 5 and 10 mm in corrugated channels. Flow regime is assumed as laminar (50 < Re < 300) and Prandtl number is kept as 0.7. Four kinds of different sinusoidal pulsatile flows are used with a combination of two different dimensionless frequencies and dimensionless amplitudes. For varying Reynolds number range, Nusselt number and friction factor are calculated. Narrow channel creates higher Nusselt number and friction factor than wide channel. At low Reynolds number, Nusselt number does not changed with pulsatile flow conditions, however at high Reynolds number cases of lower dimensionless frequency and higher dimensionless amplitude produce higher Nusselt numbers. Lower dimensionless frequency cases produce higher Nusselt number than higher dimensionless frequency cases. Pulsatile flow conditions have no effect on friction factor and for narrow and wide channel. Nusselt number prediction of FVM is close to STR and EXT for all cases of narrow channels, and close to the FH, MLS and EXT for all cases wide channel. Correlation equations for Nusselt number and friction factor are constructed by deep neural network (DNN) algorithm.

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Section: Introductionmentioning

confidence: 99%

LBM curved boundary treatments for pulsatile flow on convective heat transfer and friction factor in corrugated channels

Aslan,

Ozsaban,

Kucur

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…The intensification of heat transfer is one of the main tasks in the development of heat exchangers and electronic systems (Selvakumar et al , 2022; Hekmat and Saharkhiz, 2022; Mishra and Chhabra, 2022). Recent success in engineering has resulted in a significant reduction in the size of electronic devices, resulting in an increment of the power generated by such systems.…”

Section: Introductionmentioning

confidence: 99%

Cooling of a periodic heat-generating solid element in an electronic cabinet using a non-Newtonian pseudoplastic nanofluid and a heat-conducting substrate

Loenko

Öztop

Sheremet

2022

HFF

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Purpose Nowadays, the most important challenge in mechanical engineering, power engineering and electronics is a development of effective cooling systems for heat-generating units. Taking into account this challenge, this study aims to deal with computational investigation of thermogravitational energy transport of pseudoplastic nanoliquid in an electronic chamber with a periodic thermally producing unit placed on the bottom heat-conducting wall of finite thickness under an influence of isothermal cooling from vertical side walls. Design/methodology/approach The control equations formulated using the Boussinesq approach, Ostwald–de Waele power law and single-phase nanofluid model with experimentally based correlations of Guo et al. for nanofluid dynamic viscosity and Jang and Choi for nanofluid thermal conductivity have been worked out by the in-house computational procedure using the finite difference technique. The impact of the Rayleigh number, nanoadditives concentration, frequency of the periodic heat generation from the local element and thickness of the bottom solid substrate on nanoliquid circulation and energy transport has been studied. Findings It has been found that a raise of the nanoadditives concentration intensifies the cooling of the heat-generating element, while a growth of the heat-generation frequency allows reducing the amplitude of the heater temperature. Originality/value Mathematical modeling of a pseudoplastic nanomaterial thermogravitational energy transport in an electronic cabinet with a periodic thermally generating unit, a heat-conducting substrate and isothermal cooling vertical surfaces to identify the possibility of intensifying heat removal from a heated surface.

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Comprehensive study of heat transfer enhancement in turbulent nanofluid flow in skewed corrugated channels

Shafiei

Hekmat

Saharkhiz

2022

J Braz. Soc. Mech. Sci. Eng.

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Effect of Nanofluid Flows on Heat Transfer Intensification of Corrugated Channels with an Oscillating Blade

Cited by 6 publications

References 45 publications

LBM curved boundary treatments for pulsatile flow on convective heat transfer and friction factor in corrugated channels

LBM curved boundary treatments for pulsatile flow on convective heat transfer and friction factor in corrugated channels

Cooling of a periodic heat-generating solid element in an electronic cabinet using a non-Newtonian pseudoplastic nanofluid and a heat-conducting substrate

Comprehensive study of heat transfer enhancement in turbulent nanofluid flow in skewed corrugated channels

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