Numerical Investigation of Forced Convection of Nanofluid in Microchannels Heat Sinks

Belhadj, Abdelkadir

doi:10.18186/thermal.438480

Cited by 13 publications

(10 citation statements)

References 19 publications

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“…The numerical simulation has been performed using ANSYS FLUENT 15. The steady state continuity, conservation of momentum and energy equations for fluid are defined by eq [1], eq [2], and eq [3], respectively.…”

Section: Methodsmentioning

confidence: 99%

“…In our country, many researches have conducted on simulations of microchannels with different dimensions and boundary conditions could be seen in [1]. Mini scale heat exchangers have been widely used for many applications including cooling of electronic equipment, fuel cell, air conditioning, heat pumps, gas turbines and etc [2][3][4]. While many industrial organization have capacity to invest on mini-and micro-scale systems, they have imported this technological products and this mini-micro systems aren't became popular in the consumer market.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Research and CFD Simulation of Cross Flow Microchannel Heat Exchanger

Meral

Parlak

2021

Journal of Thermal Engineering

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In this study, a cross flow microchannel heat exchanger has been manufactured out of standard sizes using aluminum material. The plate dimensions of heat exchangers have been 50x50x3 (mm 3 ) that composed of two plates in cross flow arrangement. All evaluated geometries have been consisted of square microchannels with 490 μm width and 490 μm depth. An appropriate experimental facility has been established to perform the fluid flow and heat experiments. Moreover, heat transfer and fluid flow characteristics in microchannels have been simulated by ANSYS Fluent V15 Computer Program and experimental results have been compared with Computational Fluid Dynamics (CFD) results. Results showed that experimental heat transfer data was a very good agreement between data obtained by CFD simulation. However, the numeric pressure drop values have not been compatible with experimental ones.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Research and CFD Simulation of Cross Flow Microchannel Heat Exchanger

Meral

Parlak

2021

Journal of Thermal Engineering

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“…on the nanofluids heat transfers. Furthermore, recent researchers [79][80][81][82][83][84][85][86][87][88] reviewed the nanofluids behavior in porous media, complex geometries, solar collectors, different channels and in different base fluids which is summarized efficiently for the researchers.…”

Section: Introductionmentioning

confidence: 99%

Mixed Convection Heat Transfer of Sio2-Water and Alumina-Pao Nano-Lubricants Used in a Mechanical Ball Bearing

Hatami¹,

Ali²,

Alsabery³

et al. 2021

Journal of Thermal Engineering

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In this study, the mixed convection heat transfer in a mechanical ball bearing filled with nano-lubricants were investigated theoretically. In our case, the bearing including eight balls revolving in counter clockwise while the inner shaft rotates in clockwise direction and the inner and outer walls of bearing were kept at constant hot and cold temperatures, respectively. Two kinds of nano-lubricants SiO2-water and Alumina-Polyalphaolefin (PAO) with different shapes of nanoparticles were considered. The governing equations including velocity, pressure, and temperature formulation were solved based on the Galerkin finite element method. The governing parameters such as nanoparticle volume fraction, Reynolds and Rayleigh numbers, etc., were discussed. It turns out that the average Nusselt number increases by increasing the nanoparticle volume fraction (averagely 15% for each 0.02 increase) and the oil-based nano-lubricant has greater Nusselt number than the water based one. More importantly, the Nono-rod Alumina was found to show much greater heat transfer performance (averagely 5%) than the spherical alumina nanoparticles and nano-rod Alumina-PAO has the best performance and maximum Nusselt numbers for the heat transfer.

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“…Belhadj et al [41] performed numerical study on heat sink with different cross-section cavities inside micro-channel. Belhadj et al [42] numerically investigate the micro-channel using Al 2 O 3 -water nanofluids. Jajja et al [1] in their experimental study on mini-channel heat sink achieved the minimum base temperature of 40.5 °C for 0.2 mm fin spacing.…”

Section: Introductionmentioning

confidence: 99%

Numerical study for heat transfer enhancement using CuO water nanofluids through mini-channel heat sinks for microprocessor cooling

et al. 2020

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Original scientific paper https://doi.org/10.2298/TSCI180722022AWater cooled heat sinks are becoming popular due to increased heat generation inside the microprocessor. Timely heat removal from microprocessor is the key factor for better performance and long life. Heat transfer enhancement is reached either by increasing the surface area density and/or by altering the base fluid properties. Nanoparticles emerge as a strong candidate to increase the thermal conductivity of base fluids. In this research, the thermal performance of mini-channel heat sinks for different fin spacing (0.2 mm, 0.5 mm, 1 mm, and 1.5 mm) was investigated numerically using CuO-water nanofluids with volumetric concentration of 1.5%. The numerical values computed were than compared with the literature and a close agreement is achieved. We recorded the minimum base temperature of chip to be 36.8 °C for 0.2 mm fin spacing heat sink. A reduction of 9.1% in base temperature was noticed using CuO-water nanofluids for 0.2 mm fin spacing as compared to previously experimental estimated value using water [1]. The drop percentage difference in pressure between water and CuO-water nanofluids was 2.2-13.1% for various fin spacing heat sinks. The percentage difference in thermal resistance between water and CuO-water nanofluids was computed 12.1% at maximum flow rate. We also observed uniform temperature distribution for all heat sinks.

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Numerical Investigation of Forced Convection of Nanofluid in Microchannels Heat Sinks

Cited by 13 publications

References 19 publications

Experimental Research and CFD Simulation of Cross Flow Microchannel Heat Exchanger

Experimental Research and CFD Simulation of Cross Flow Microchannel Heat Exchanger

Mixed Convection Heat Transfer of Sio2-Water and Alumina-Pao Nano-Lubricants Used in a Mechanical Ball Bearing

Numerical study for heat transfer enhancement using CuO water nanofluids through mini-channel heat sinks for microprocessor cooling

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