Showing papers on "Heat sink published in 2022"
TL;DR: In this paper, two models of porous media with the same volume fraction were designed aiming to evaluate the effects of nanomaterial and metallic foam to the conventional solid heat sink on thermal performance, at the constant Reynolds number, the heat sinks which are consist of metallic foam, have better cooling performance and are able to decrease the surface temperature of heat sink more.
78 citations
TL;DR: In this paper , two models of porous media with the same volume fraction were designed aiming to evaluate the effects of nanomaterial and metallic foam to the conventional solid heat sink on thermal performance.
76 citations
TL;DR: In this article , the authors investigated the optimal thermal management both on the internal server cooling cycle and external cold source water cycle under different ambient temperatures based on the principle of minimal power consumption.
51 citations
TL;DR: In this paper , the impact of heat transmission in a Carreau fluid flow (CFF) through a stretching cylinder in terms of the nonlinear stretching rate and irregular heat source/sink was investigated.
Abstract: During thermal radiation treatments, heat therapies, and examination procedures like scans and X-rays, the cylindrical blood vessels may get stretched; meanwhile, the blood flow through those blood vessels may get affected due to temperature variations around them. To overcome this issue, this work was framed to explore the impact of heat transmission in a Carreau fluid flow (CFF) through a stretching cylinder in terms of the nonlinear stretching rate and irregular heat source/sink. Temperature-dependent thermal conductivity and thermal radiation are taken into consideration in this study. To tranform complicated partial differential equations into ordinary differential equations, appropriate similarity variables are used. For a limited set of instances, the derived series solutions are compared to previously published results. For linear and nonlinear stretching rates, graphs and tables are used to examine the influence of an irregular heat source/sink on fluid movement and heat transfer. The research outcomes demonstrate that the heat source and nonlinear stretching rate cause a disruption in the temperature distribution in the fluid region, which can alter the blood flow through the vessels. In all conditions except for the heat in an internal heat sink, the nonlinear stretching situation improves the velocity and heat profile. Furthermore, with the increase in the values of the Weissenberg number, the temperature profile shows opposing features in a shear-thickening fluid and shear-thinning fluid. For the former n > 1, the blood fluidity gets affected, restricting the free movement of blood. For the latter, n < 1, the phenomenon is reversed. Other industrial applications of this work are wire coating, plastic coverings, paper fabrication, fiber whirling, etc. In all of those processes, the fluid flow is manipulated by thermal conditions.
40 citations
TL;DR: In this paper , an experimental investigation was performed to single out the thermal performance of nickel foam-based heat sink embedded with RT-44HC paraffin as phase change material (PCM), which is used for high heat transfer area with a minimum reduction in the latent heat of a composite PCM.
38 citations
TL;DR: In this article , the impacts of phase changing substance (PCM) and nano-improved phase changing substances (NIPCM) on the thermal performance of a heat sink to be used for an electronic chipset are investigated.
37 citations
TL;DR: In this paper , the thermal resistance theoretical model of the micro-channel heat sink was first established and then, fabrication process of the fabricated micro channel heat sink is introduced, and heat transfer performance was tested through the developed testing platform, results show that the developed micro-Channel heat sink has more superior heat dissipation performance over conventional metal solid heat sink and it is well suited for high power LEDs application.
Abstract: Abstract With the advent of the 5G era, the design of electronic equipment is developing towards thinness, intelligence and multi-function, which requires higher cooling performance of the equipment. Micro-channel heat sink is promising for the heat dissipation of super-thin electronic equipment. In this study, thermal resistance theoretical model of the micro-channel heat sink was first established. Then, fabrication process of the micro-channel heat sink was introduced. Subsequently, heat transfer performance of the fabricated micro-channel heat sink was tested through the developed testing platform. Results show that the developed micro-channel heat sink has more superior heat dissipation performance over conventional metal solid heat sink and it is well suited for high power LEDs application. Moreover, the micro-channel structures in the heat sink were optimized by orthogonal test. Based on the orthogonal optimization, heat dissipation performance of the micro-channel radiator was further improved.
35 citations
TL;DR: In this article , the transmission of heat through the stretching cylinder is observed in two terms, one is non-linear stretching and other is irregular heat sink/source, and they used similar variables to translate the complex partial differential equations into the ordinary differential equations.
34 citations
TL;DR: Li et al. as discussed by the authors proposed an elastocaloric refrigerator using a single actuator with an inclined angle to produce a vertical tensile force to nickel-titanium (NiTi) shape-memory wires and a lateral motion to translate the NiTi wires between the hot and cold sides.
33 citations
TL;DR: In this paper , the thermal resistance theoretical model of the micro-channel heat sink was first established and then, fabrication process of the fabricated micro channel heat sink is introduced, and heat transfer performance was tested through the developed testing platform, results show that the developed micro-Channel heat sink has more superior heat dissipation performance over conventional metal solid heat sink and it is well suited for high power LEDs application.
Abstract: Abstract With the advent of the 5G era, the design of electronic equipment is developing towards thinness, intelligence and multi-function, which requires higher cooling performance of the equipment. Micro-channel heat sink is promising for the heat dissipation of super-thin electronic equipment. In this study, thermal resistance theoretical model of the micro-channel heat sink was first established. Then, fabrication process of the micro-channel heat sink was introduced. Subsequently, heat transfer performance of the fabricated micro-channel heat sink was tested through the developed testing platform. Results show that the developed micro-channel heat sink has more superior heat dissipation performance over conventional metal solid heat sink and it is well suited for high power LEDs application. Moreover, the micro-channel structures in the heat sink were optimized by orthogonal test. Based on the orthogonal optimization, heat dissipation performance of the micro-channel radiator was further improved.
30 citations
TL;DR: In this article , a micro-channel heat sink (MCHS) with micro-pin-fins was investigated numerically, and optimal configurations were obtained in terms of Reynolds number and porosity.
TL;DR: In this article , a generalized fractional thermal transport model is proposed to describe the thermal memory effects in a circular cylinder, where the generalized constitutive equation becomes equivalent to the classical Fourier's law for the zero value of the fractional order of derivative.
Abstract: Unsteady natural convection flow of viscous fluids in a circular cylinder, due to a generalized fractional thermal transport is analytically studied. The considered mathematical model is based on a new fractional differential constitutive equation of the thermal flux suitable to describe the thermal memory effects. To develop the mathematical model, the time-fractional Caputo-Fabrizio derivative is used. The generalized constitutive equation becomes equivalent to the classical Fourier's law for the zero value of the fractional order of derivative. Analytical solutions for the fluid temperature and velocity are determined using the Laplace and finite Hankel transforms. The influence of the memory parameter on heat transfer and fluid motion is discussed by numerical simulations and graphical illustrations.
TL;DR: In this article, a three-dimensional fluid-solid conjugate model with symmetric and parallel wavy microchannels was studied, and the results showed that the symmetric configuration yields higher Nusselt numbers than the parallel one, and it is especially true for higher Reynolds numbers and larger amplitude-to-wavelength ratios.
TL;DR: In this article, an experimental and numerical investigation on the thermofluidic performance of Al2O3-water nanofluids through oblique fin heat sink microchannel (OFHS MC) was presented.
TL;DR: In this paper, a thermal management cooling system using heat sink, perforated heat sink and series configurations of dimples which are circular, elliptic, and cylindrical were performed.
TL;DR: In this paper, the performance of the heat sink and thermal storage heat sink techniques were analyzed amongst the three passively cooled PV panels and the efficacy of the immersion and coolant thermal properties was evaluated and discussed for the four actively cooled Photovoltaic Thermal (PVT) collectors.
Abstract: The present work carries about a unique experimental investigation in the thermal management and cooling realms of the Photovoltaic (PV) panels under the most harsh environmental conditions. The performance of the heat sink and thermal storage heat sink techniques were analysed amongst the three passively cooled PV panels. Moreover, the efficacy of the immersion and coolant thermal properties was evaluated and discussed for the four actively cooled Photovoltaic Thermal (PVT) collectors. Even though, it was found that the heat sink-based PV panel configuration is more performant relatively compared to the PCM heat sink based-PV one since a drop of ten-degree in PV cell temperature was recorded, but still, the heat dissipation rate is not enough to withstand the severe mechanical and electrical degradation challenges under the harsh environmental climate of Saudi Arabia. For the actively cooled PVT collectors, it was found that the immersion technique protects the PV panel from the hot spot apparatuses and lead to better heat dissipation uniformity. The heat pipes based-PVT collector immersed in regular water has recorded the optimal temperature distribution and maximum temperature drop by 53% relatively compared to best passively cooled configuration. With ethylene glycol, engine oil, and active cooling without immersion, the steady-state PV temperature has been reduced relatively compared to a passively cooled PV panel by about 48%, 25%, and 21%, respectively.
TL;DR: In this paper, a review of the challenges and opportunities in thermal management of aircraft is presented, along with possible solutions and opportunities from the literature, with a focus on the use of composites in transferring waste heat from aircraft to the surrounding atmosphere.
TL;DR: In this article , a review of the challenges and opportunities in thermal management of aircraft is presented, along with possible solutions and opportunities from the literature, with a focus on the use of composites in transferring waste heat from aircraft to the surrounding atmosphere.
TL;DR: In this article , a phase change material (PCM)-expanded graphite (EG) composite was used for better thermal management of a battery at discharge rates higher than its maximum discharge limit 2C.
TL;DR: In this paper , an experimental and numerical investigation on the thermofluidic performance of Al2O3-water nanofluids through oblique fin heat sink microchannel (OFHS MC) in the Reynolds number range 100-300.
TL;DR: In this paper, Liu et al. carried out numerical simulations and parameter sensitivity analysis to investigate the key factors of the fluid flow and heat transfer performance in rectangular microchannels, and considered variables included key physical parameters of the fluids and dimensions of the micro channels.
TL;DR: In this article , the performance of a pin fin heat sink with a fin angle of 22.5° has been investigated using graphene oxide (GO) nanofluid under laminar flow regime.
TL;DR: In this article , the authors provide beneficial information regarding the different designs and methods for heat enhancement and overall thermal performance in straight and wavy microchannel heat sinks with nanofluids, modified designs improve heat transfer performance due to incorporating secondary flow.
Abstract: As demand for high-performance heat transfer increases, interest in microchannel heat sinks as a viable solution for heat flux removal in thermal devices has grown significantly. Microchannel heat sinks with straight and wavy designs are the two main varieties that have been the focus of extensive research in this field. The current paper provides beneficial information regarding the different designs and methods for heat enhancement and overall thermal performance in straight and wavy microchannel heat sinks. Besides using nanofluids, modified designs improve heat transfer performance due to incorporating secondary flow. Moreover, utilizing microchannels as indirect cooling methods in lithium-ion battery thermal management is discussed in this review. This study discusses current issues and future research directions.
TL;DR: In this article , Liu et al. carried out numerical simulations and parameter sensitivity analysis to investigate the key factors of the fluid flow and heat transfer performance in rectangular microchannels, and considered variables included key physical parameters of the fluids and dimensions of the micro channels.
TL;DR: In this article , the authors discuss the latest research trends in this field, with a special focus on electric batteries, power electronic, and portable device applications, and discuss methods to enhance PCM-based heat sinks for electronic devices.
TL;DR: In this article , a thermal management cooling system using heat sink, perforated heat sink and series configurations of dimples which are circular, elliptic, and cylindrical were performed.
TL;DR: In this article , an experimental study was conducted to inspect the heat transfer characteristics of a uniquely designed staggered oriented airfoil shaped pin-fin heat sink employing Fe2O3-SiO2 hybrid nanofluid with different mixture ratios.
TL;DR: In this article , three innovative microchannel heat sinks with sector bump (MCSB), diamond bump (DBS) and MCDB were designed and compared to the straight microchannel with the same heat transfer area, the heat transfer and flow characteristics ( Nu , f and performance evaluation criterion PEC ) of three innovative heat sinks were investigated numerically.
TL;DR: In this paper , the authors reviewed various research methodologies (using single-phase coolant) to aim for heat sink optimization and thermal performance enhancement in three major heat sink geometries: flat-plate, pin-fin, and micro-channel heat sinks.
Abstract: • Passive and active cooling techniques for battery and electronic components cooling • Computational and experimental techniques for battery and electronic components cooling • Single phase coolant investigation • Geometry optimization concerning energy management • Flat plate, pin fin, and microchannel heat sink cooling investigation Heat sinks are considered as heat exchangers employed to cool high-temperature devices such as electronic components. They can significantly improve heat dissipation from the base surface. A wide range of heat sink geometries is categorized into three major types: flat-plate, pin-fin, and microchannel heat sinks. Over the past few decades, to keep up with the rate of electronics components heat flux, extensive examinations carried to enhance heat sinks thermal performance include various fabrication materials, single-phase coolants, geometry optimization, and designing complicated heat sink concepts. Heat sink optimization contributes a significant opportunity to improve thermal management and reduce energy consumption. Hence, developing and reviewing different heat sink research methodologies is fundamental. This paper reviews various research methodologies (using single-phase coolant) to aim for heat sink optimization and thermal performance enhancement in three geometry categories (flat-plate, pin-fin, and microchannel). The reviewed articles focused on experimental, numerical, and computational efforts on energy storage thermal managements utilizing single-phase coolant for flat-plate, pin-fin, and microchannel heat sinks design.
TL;DR: In this paper , the authors investigated the entropy generation and hydrothermal characteristics of water-based MWCNT (multiwalled carbon nanotubes/graphene nanoplatelets) nanofluids in a heat sink equipped with fin configurations.