Effects of pin and wire electrodes on flow boiling heat transfer enhancement in a vertical minichannel heat sink

Zhang, Jinxin; Luo, Xiaoping; Feng, Zhenfei; Guo, Feng

doi:10.1016/j.ijheatmasstransfer.2019.03.043

Cited by 24 publications

(4 citation statements)

References 44 publications

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“…Because of some unique advantages of using the EHD technique, it has been widely investigated for increasing heat transfer as a method. Some examples for the application of the EHD technique are cooling heat sink (Tang et al , 2020; Joppolo et al , 2012; Nourdanesh and Ranjbar (2022); Zhang et al , 2019; Wang et al , 2013; Fazlollahi and Alemrajabi, 2018), solar collectors and chimney (Nourdanesh et al , 2020; Haghighat et al , 2019), air-cooled photovoltaic/thermal systems (Golzari et al , 2018), solar air heater (Kasayapanand and Kiatsiriroat, 2006), condensation (Mohammadi et al , 2021; Sadek et al , 2010), single-phase and two-phase heat and mass transfer (Alamgholilou and Esmaeilzadeh, 2012; Lohrasbi et al , 2017), mixing (Jalaal et al , 2013), boiling (Nangle-Smith and Cotton, 2019; Nangle-Smith and Cotton, 2018), heat pump systems (Trommelmans and Berghmans, 1986), air conditioning systems (Ohadi, 1991), film cooling (Jafari et al , 2020; Li et al , 2021), drying (Iranshahi et al , 2020; Dolati et al , 2018), defrosting systems (Rijing et al , 2020; Malik et al , 2020) and others. Compact size, simple design, no moving parts, noiselessness and insignificant electricity consumption (Seyed-Yagoobi and Bryan, 1999) are the reasons for this wide attention.…”

Section: Introductionmentioning

confidence: 99%

Introduction of a novel electric field-based plate heat sink for heat transfer enhancement of thermal systems

Nourdanesh

Ranjbar

2021

HFF

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Purpose The purpose of this study is to use an electric field technique to design novel heat sinks capable of rejecting as much heat as possible in a limited space. Configuration of electrodes in this study can be used for increasing the efficiency of heat sinks. Design/methodology/approach This study investigates a novel electrohydrodynamic (EHD)-based heat sink for thermal management of electronic devices and thermal systems. The significant part of designing an EHD heat sink is the arrangement of the electrodes. A numerical simulation is performed for a heat sink with two parallel plates to determine the optimum dimensional configuration of electrodes. The upper plate of this heat sink is the ground electrode with a constant atmosphere temperature, and the lower plate of it with flush-mounted high-voltage electrodes has uniform heat flux. Findings The results show that heat transfer changes by the size of the vortices and the number of them. These vortices are emerged by the electric field, and the number of them increases with increasing the number of electrodes. The interaction of vortices size and number leads to having the lowest average temperature in the optimum case by two high voltage electrodes with widths of 7.5 mm and a 17.5 mm gap between them. In comparison with the case without the electric field, with increasing the applied voltage to 30 kV, the efficiency of this EHD heat sink increases up to 37%. Originality/value Improvements in electrical equipment make them more compact with higher heat fluxes. Hence, the amount of heat to be dissipated per area increases and needs thermal management to operate at their design temperatures. Therefore, to improve the performance and life span of electronic components and increase their efficiency, it is necessary to design heat sinks to decrease their maximum (peak) temperature.

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Section: Introductionmentioning

confidence: 99%

Introduction of a novel electric field-based plate heat sink for heat transfer enhancement of thermal systems

Nourdanesh

Ranjbar

2021

HFF

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“…That is because the upstream, middle of minichannel and downstream region are single phase, subcooled boiling and saturated boiling region, respectively. In the single-phase region, the heat transfer intensification is mainly caused by intensified effects of ultrasound on convective heat transfer by accelerating bulk fluid movement, while in the two-phase region, the heat transfer enhancement is mainly attributed to the ultrasonic effect on bubble dynamics [12] , [13] . When the heat flux increases to 16.5 kW/m 2 under ultrasound, h n increases sharper than that without ultrasound in the upstream, and then presents slightly drop.…”

Section: Resultsmentioning

confidence: 99%

“…); and active technologies, e.g. electric field [12] , [13] , magnetic field [14] , [15] , ultrasonic field [16] , [17] etc.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of flow boiling heat transfer enhancement under ultrasound fields in a minichannel heat sink

Fan

Luo

et al. 2021

Ultrasonics Sonochemistry

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“…where h c is the heat transfer coefficient, k is the thermal conductivity, z is the coordinate directed from welding wire to molten pool, and radiation loss is neglected. The heat transfer coefficient for wire electrode 16], and thermal conductivity is ( )…”

Section: Temperature Space Distributionmentioning

confidence: 99%

Fume emissions by electric arc during gas metal arc welding

Darakov¹,

Vishnyakov²,

Ennan³

et al. 2022

ФАС

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The influence of welding arc regime on the welding fumes formation is studied by numerical modeling via description of separate processes inside the space charge regions near electrodes in the welding arc with consumable electrode. The modeling comprises the calculation of temperature profiles for electrons and heavy component, calculation of space distribution of gas components’ number densities, of gas particles’ mean free pathes, of electric potential and field, calculation of the heat transfer from electrode wire (anode) to molten pool (cathode). The formation of high temperature metal vapor from molten pool to environment as a function of arc current is demonstrated. The nucleation in the plasma of welding fumes is considered with taken into account ionization of vapor atoms via their interaction with nucleus surface. The growth of nucleus droplets via vapor condensation and coalescence is calculated. The coagulation of solid primary particles for various values of welding current is calculated and inhalable particle size distribution is demonstrated.

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Effects of pin and wire electrodes on flow boiling heat transfer enhancement in a vertical minichannel heat sink

Cited by 24 publications

References 44 publications

Introduction of a novel electric field-based plate heat sink for heat transfer enhancement of thermal systems

Introduction of a novel electric field-based plate heat sink for heat transfer enhancement of thermal systems

Experimental investigation of flow boiling heat transfer enhancement under ultrasound fields in a minichannel heat sink

Fume emissions by electric arc during gas metal arc welding

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