Flat miniature heat pipe with sintered porous wick structure: experimental and mathematical studies

Zeghari, Kaoutar; Louahlia-Gualous, H.

doi:10.1016/j.ijheatmasstransfer.2020.120021

Cited by 18 publications

(2 citation statements)

References 47 publications

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“…Devices made of silicon carbide or gallium nitride have been developed, with chip element sizes reaching

. In these specific cases, heat flux densities in a range of

are achieved for surface areas as small as

and

for

[ 2 , 12 , 13 , 14 , 15 ]. In the case of FMHP [ 2 ], for copper-water coupling, heat fluxes of the order of 40 W/cm 2 applied to the evaporator wall in a vertical position can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Vapor Formation Rate and Phase Shift between Pressure Gradient and Liquid Velocity in Flat Mini Heat Pipes as a Function of Internal Structure

2023

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Flat mini heat pipes (FMHPs) are often used in cooling systems for various power electronic components, as they rapidly dissipate high heat flux densities. The main objective of the present work is to experimentally investigate whether differences in the rate of vapor formation occur on an internal structure containing trapezoidal microchannels and porous sintered copper powder material. Several parameters, such as hydraulic diameter and fluid velocity through the material, as a function of the internal structure porosity, were determined by calculation for a steady state regime. Reynolds number was determined as a function of porosity, according to Darcy’s law, and the Nusselt number was calculated. Since the flow is Darcy-type through the porous medium inside the FMHP, the Darcy friction factor was calculated using five methods: Colebrook, Darcy–Weisbach, Swamee–Jain, Blasius, and Haaland. After experimental tests, it was found that when the porous and trapezoidal microchannel layers are wetted at the same time, the vaporization progresses at a faster rate in the porous material, and the duration of the process is shorter. This recommends the use of such an internal structure in FMHPs since the manufacturing technology is simpler, the materials are cheaper, and the heat flux transport capacity is higher.

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“…Devices made of silicon carbide or gallium nitride have been developed, with chip element sizes reaching

. In these specific cases, heat flux densities in a range of

are achieved for surface areas as small as

and

for

[ 2 , 12 , 13 , 14 , 15 ]. In the case of FMHP [ 2 ], for copper-water coupling, heat fluxes of the order of 40 W/cm 2 applied to the evaporator wall in a vertical position can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Vapor Formation Rate and Phase Shift between Pressure Gradient and Liquid Velocity in Flat Mini Heat Pipes as a Function of Internal Structure

2023

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show abstract

“…Insulated substrates with single anisotropic layer were analyzed in [26], having sources and sinks on both sides, neglecting the heat sink convective plane. As further complication, the authors in [11,27,28,29] included a vapour chamber in between isotropic laminates, in order to passively spread the heat by promoting two-phase recirculation based on capillary force pumping. Moreover, once the temperature distribution is known in the source plane as the solution of the Laplace's heat equation, a prediction for the total resistance connected to each component can be obtained.…”

Section: Introductionmentioning

confidence: 99%

A Fast Computational Method for the Optimal Thermal Design of Anisotropic Multilayer Structures with Discrete Heat Sources for Electrified Propulsion Systems

Ghioldi

Hélie²,

Piscaglia

2022

International Journal of Heat and Mass Transfer

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Effects of inclination angle and heat power on heat transfer behavior of flat heat pipe with bionic grading microchannels

Ren

Yin

et al. 2022

Applied Thermal Engineering

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Flat miniature heat pipe with sintered porous wick structure: experimental and mathematical studies

Cited by 18 publications

References 47 publications

Assessment of Vapor Formation Rate and Phase Shift between Pressure Gradient and Liquid Velocity in Flat Mini Heat Pipes as a Function of Internal Structure

Assessment of Vapor Formation Rate and Phase Shift between Pressure Gradient and Liquid Velocity in Flat Mini Heat Pipes as a Function of Internal Structure

A Fast Computational Method for the Optimal Thermal Design of Anisotropic Multilayer Structures with Discrete Heat Sources for Electrified Propulsion Systems

Effects of inclination angle and heat power on heat transfer behavior of flat heat pipe with bionic grading microchannels

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