Numerical Computation of Fluid Flow and Heat Transfer in a Mems-Based Micro Channel Heat Sink

Ismail, Muhammad; Rashid, Moshiur; Mahbub, M.

doi:10.5098/hmt.v3.3.3002

Cited by 3 publications

(1 citation statement)

References 28 publications

(24 reference statements)

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“…The miniaturization of industrial products is continuously evolving due to the technological development in many industrial fields. The everincreasing miniaturization raises several challenges in which cooling plays an important role, such as in the development of micro-heatexchangers (Chung et al, 2011;Khan and Fartaj, 2011;Han et al, 2012;Ismail et al, 2012;Kanor and Manimaran, 2016;Zhang, 2017;Qasem and Zubair, 2018;Zarita and Hachemi, 2019;Ramesh et al, 2021;Soheel et al, 2021;Turkyilmazoglu, 2021b;Gao et al, 2022;Gulia and Sur, 2022;Al-Gburi et al, 2023;Jaddoa et al, 2023). Therefore, understanding the physics of heat transfer and fluid flow at the microscale level has a significant role in this industrial trend.…”

Section: Introductionmentioning

confidence: 99%

Analytical Solution of the Extended Graetz Problem in Microchannels and Microtubes With Fixed Pressure Drop

Shaimi¹,

Khatyr²,

Naciri³

2023

Front. Heat Mass Transf.

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This paper presents an exact analytical solution to the extended Graetz problem in microchannels and microtubes, including axial heat conduction, viscous dissipation, and rarefaction effects for an imposed constant wall temperature. The flow in the microchannel or microtube is assumed to be hydrodynamically fully developed. At the same time, the first-order slip-velocity and temperature jump models represent the wall boundary conditions. The energy equation is solved analytically, and the solution is obtained in terms of Kummer functions with expansion constants directly determined from explicit expressions. The local and fully developed Nusselt numbers are calculated in terms of the Péclet number, Brinkman number, Knudsen number, and thermal properties of the fluid. The constant pressure drop along the streamwise direction per unit length is imposed at a constant value and independent of the flow parameters, unlike the usual practice of fixing the average velocity. This solution can be used as the reference solution for optimization problems to enhance heat transfer using a fixed pressure drop. It is found that for no viscous dissipation and negligible axial heat conduction, the local Nusselt number is larger for imposed pressure drop compared to imposed average velocity. The thermal entrance length increases as the Knudsen number or the degree of temperature jump increases for imposed pressure drop, while it is approximately unchangeable for imposed average velocity. The quantitative differences between the cases of imposed pressure drop and imposed average velocity in the average Nusselt number over the largest thermal entrance length are reduced with the increase of axial heat conduction or viscous dissipation effects. The fully developed Nusselt number is the same for imposed pressure drop and imposed average velocity.

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Section: Introductionmentioning

confidence: 99%

Analytical Solution of the Extended Graetz Problem in Microchannels and Microtubes With Fixed Pressure Drop

Shaimi¹,

Khatyr²,

Naciri³

2023

Front. Heat Mass Transf.

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Effects of Perforations on the Thermal and Fluid Dynamic Performance of a Heat Exchanger

Ismail

2013

IEEE Trans. Compon., Packag. Manufact. Technol.

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Efficiency Increasing of Thermoelectric Micro Generator Using Carbon Nanotube Interface

Salami

Sheikholeslami

Fathi

2013

AMR

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Thermoelectric (TE) devices are an interested family of energy harvesters which could convert the thermal energy into electricity. However, the temperature drops at interface between thermoelectric materials and heat source, heat sink and electrodes reduce efficiency of thermoelectric devices. As a solution, thermal interface materials (TIM) which have high thermal conductance and low thermal interface resistance with adjacent materials are added to the device. In this paper, the organic material is considered as the base material for a TE energy harvester device. Also, carbon nanotube (CNT) is applied as TIM, because of its high one dimentional electrical and thermal conductance. A finite element analysis is carried out in order to investigate the role of thermal contact resistance on heat transfer at TE device. To do this, a thermoelectric leg is simulated with two structure consist of (a) TE material and electrodes in direct contact (b) TE material and electrodes with CNT interface and the results are compared. It is shown that CNT layer reduces heat dissipation at the interface and so the temperature difference at the both sides of polymer is increased, which finally results the enhancement of device output voltage.

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Numerical Computation of Fluid Flow and Heat Transfer in a Mems-Based Micro Channel Heat Sink

Cited by 3 publications

References 28 publications

Analytical Solution of the Extended Graetz Problem in Microchannels and Microtubes With Fixed Pressure Drop

Analytical Solution of the Extended Graetz Problem in Microchannels and Microtubes With Fixed Pressure Drop

Effects of Perforations on the Thermal and Fluid Dynamic Performance of a Heat Exchanger

Efficiency Increasing of Thermoelectric Micro Generator Using Carbon Nanotube Interface

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