Heat transfer enhancement of a microchannel heat sink with the combination of impinging jets, dimples, and side outlets

Gan, Ting; Ming, Tingzhen; Fang, Weijie; Yang, Liu; Miao, Lei; Ren, Kun; Ahmadi, Mohammad Hossein

doi:10.1007/s10973-019-08754-z

Cited by 40 publications

(8 citation statements)

References 51 publications

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“…In addition, due to the rapid increase in the total power consumption of electronics, the generated heat greatly reduces the operation performance and exacerbates the failure of electronic devices. 47,48 The Central Processing Unit (CPU) generates a lot of heat during the normal operation, which seriously decreases the stability and running speed of the computer. It is reported that the CPU performance gradually decreases by 10% for every 2 1C increase in the working temperature when it is higher than 70 1C.…”

Section: Papermentioning

confidence: 99%

Stretchable thermogalvanic hydrogel thermocell with record-high specific output power density enabled by ion-induced crystallization

Zhang

Mao

et al. 2022

Energy Environ. Sci.

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Section: Papermentioning

confidence: 99%

Stretchable thermogalvanic hydrogel thermocell with record-high specific output power density enabled by ion-induced crystallization

Zhang

Mao

et al. 2022

Energy Environ. Sci.

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“…On the basis of researchers' pioneering work [9] about flat microchannels, the application of Navier-Stokes equations is proved to be valid for this scale, as well as the negligibility of surface roughness, viscous heating and axial heat transfer. In a gesture to avoid rapid temperature increase along the flow direction, the addition of rough elements in MCHS are widely used, such as dimples [10,11], ribs and grooves [12][13][14][15], fins [16,17], and so on [18]. Among them, micro pin fin heat sink (MPFHS) draws a great deal of attention, which is normally consisted of micro channels with an array of aligned or staggered circular pin fins.…”

Section: Introductionmentioning

confidence: 99%

Hydraulic and Thermal Performance of Microchannel Heat Sink Inserted with Pin Fins

et al. 2021

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With the development of micromachining technologies, a wider use of microchannel heat sink (MCHS) is achieved in many fields, especially for cooling electronic chips. A microchannel with a width of 500 μm and a height of 500 μm is investigated through the numerical simulation method. Pin fins are arranged at an inclined angle of 0°, 30°, 45°, and 60°, when arrangement method includes in-lined pattern and staggered pattern. The effects of inclined angle and arrangement method on flow field and temperature field of MCHSs are studied when Reynolds number ranges from 10 to 300. In addition to this, quantitative analyses of hydraulic and thermal performance are also discussed in this work. With the increase of inclined angle, the variation of friction factor and Nusselt number do not follow certain rules. The best thermal performance is achieved in MCHS with in-lined fines at an inclined angle of 30° accompanied with the largest friction factor. Arrangement method of pin fins plays a less significant role compared with inclined angle from a general view, particularly in the Reynolds number range of 100 ~300.

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“…Some researchers (Alsabery et al, 2019;Alsabery, Gedik, et al, 2020;Alsabery, Ismael, et al, 2020;Ayoubi Ayoubloo et al, 2019;Chamkha et al, 2019;Dogonchi et al, 2020;Hoseinzadeh et al, 2019;Mehryan, Izadi, et al, 2019;Mehryan, Izadpanahi, et al, 2019;Selimefendigil et al, 2019;Shashikumar et al, 2019;Tayebi et al, 2019) have studied the thermohydraulic characteristics numerically through circular and non-circular tubes by using various single acting NFs and hybrid NFs. Also, some others researchers (Aghayari et al, 2020;Ahmadi et al, 2020;Beigzadeh et al, 2020;Ez Abadi et al, 2020;Gan et al, 2020;Ghahremannezhad et al, 2019;Jilte et al, 2020;Maddah et al, 2019;Sharma et al, 2020) explored, both experimentally and computationally, the thermal performance of NFs in micro, mini and conventional circular and non-circular channels. Similarly, Mahdavi et al (2017), Neyestani et al (2019) and Sharifpur et al (2018) studied, both experimentally and numerically, natural and forced convection by using newly developed nanofluids.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer and fluid flow analysis using nanofluids in diamond-shaped cavities with novel obstacles

Aghaei

Bhattacharyya

Dezfulizadeh

et al. 2021

Engineering Applications of Computational Fluid Mechanics

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This work computationally explores the two-phase flow of nanofluids and their thermal energy transport coefficients in 3D diamond-shaped cavities with square-shaped barriers having reducing dimensions. Materials with two emissivity values, ε = 0.3 and 0.9, have been considered to investigate the effect of the radiation thermal energy transport coefficient while the hot side is maintained at 400 or 500 K. Two values of the Rayleigh number, Ra = 10 6 and 10 8 , are used for the study. Cu nanoparticles (NPs) with an average size of 25 nm have been used at a concentration of 0.01-0.05% in the base fluid. The temperature gradients and thermal energy transport coefficient characteristics are enhanced by raising the volume concentration of nanoparticles, but the streamlines do not alter substantially. By increasing Ra, the thermal energy transport coefficient rate is further augmented. It is also found that increasing the Ra and volume concentration of NPs results in enhanced heat transfer inside a cavity, while a change in the emissivity coefficient has no significant impact on the thermal and flow characteristics of the nanofluid. For each case, there is an optimum NP volume fraction for each model that leads to the highest Nusselt number.

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Heat transfer enhancement of a microchannel heat sink with the combination of impinging jets, dimples, and side outlets

Cited by 40 publications

References 51 publications

Stretchable thermogalvanic hydrogel thermocell with record-high specific output power density enabled by ion-induced crystallization

Stretchable thermogalvanic hydrogel thermocell with record-high specific output power density enabled by ion-induced crystallization

Hydraulic and Thermal Performance of Microchannel Heat Sink Inserted with Pin Fins

Heat transfer and fluid flow analysis using nanofluids in diamond-shaped cavities with novel obstacles

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