Measurement of transient liquid film and its effect on flow boiling heat transfer in non-circular microchannels

Zhang, Peng; Wang, Tao; Jiang, Yuyan; Chen, Guo

doi:10.1016/j.ijthermalsci.2022.108004

Cited by 10 publications

(2 citation statements)

References 31 publications

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“…Furthermore, the change in the heat transfer mechanism leads to a change in the Tw and HTC in a non-monotonic relationship with mass flux. At lower mass flux, the heat transfer mechanism is the evaporation of thin liquid film, which has a higher heat transfer capacity compared to the bubble nucleation heat transfer mechanism [35]. Thus, the Tw increases with increasing mass The change in the flow patterns of two heat sinks connected in parallel is shown in Figure 6.…”

Section: (B) (A)mentioning

confidence: 99%

Experimental Investigation on the Flow Boiling of Two Microchannel Heat Sinks Connected in Parallel and Series for Cooling of Multiple Heat Sources

et al. 2023

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Cooling methods for multiple heat sources with high heat flux have rarely been reported, but such situations threaten the stable operation of electronic devices. Therefore, in this paper, the use of two microchannel heat sinks is proposed, with and without grooves, labeled Type A and Type B, respectively. Experimental investigations on the flow boiling of two microchannel heat sinks connected in parallel and in series are carried out under different mass fluxes. In addition, a high-speed camera is used to observe flow patterns in the microchannels. The cold plate wall temperature (Tw), heat transfer coefficient (HTC), and pressure drop (PD) are obtained with the use of two microchannel heat sinks. The flow patterns of the bubbly flow and elongated bubbles in the microchannels are observed. The results of the analysis indicated that the Tw, HTC, and PD of the two microchannel heat sinks connected in parallel were degraded, especially when using the Type A-B parallel connection. Compared to the use of a single heat sink, the maximum decrease in HTC was 9.44 kW/(m2K) for Type A heat sinks connected in parallel, which represents a decrease of 45.95%. The influence of the series connection on the Tw, HTC, and PD of the two heat sinks is obvious. The Type A-A series connection exerted the greatest positive effect on the performance of the two heat sinks, especially in the case of the postposition heat sink. The maximum increase in HTC was 12.77 kW/(m2K) for the postposition Type A heat sink, representing an increase of 72.88%. These results could provide a reference for a two-phase flow-cooling complex for multiple heat sources with high heat flux.

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Section: (B) (A)mentioning

confidence: 99%

Experimental Investigation on the Flow Boiling of Two Microchannel Heat Sinks Connected in Parallel and Series for Cooling of Multiple Heat Sources

et al. 2023

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“…In the current field, several models and simulation results regarding the Teapot Effect have been developed. Some of these models are based on fundamental principles such as the Navier-Stokes equations [4][5][6], turbulence models [7][8][9], and boundary conditions involving surface contact [10,11]. Since the 1950s, the teapot effect has been extensively studied by different groups.…”

Section: Introductionmentioning

confidence: 99%

The Formation of the Teapot Effect under Different Forces

Zeng

2023

AJST

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The phenomenon known as the “teapot effect”, which refers to the movement of fluid along the outer wall of a teapot, has garnered significant attention in recent decades within the field of scientific research. Various methods, including the momentum balance method and the hydrodynamic equations, have been utilized to investigate this phenomenon. In this study, we employ a simplified model to examine the influence of different forces on the fluid as it moves along the solid surface. These forces include the adhesive forces between the solid surface and the fluid, the coupling force within the fluid, and gravity. Additionally, we explore the conditions under which the fluid can separate into distinct layers during the teapot effect. Some layers of the fluid may adhere to the outer wall of the teapot, while others may be expelled. The occurrence of this phenomenon is determined by the relative magnitudes of the different forces acting on the fluid. Furthermore, we analyze and calculate the effect’s dependence on velocity. Through our calculations, we contribute to a deeper understanding of how these forces impact the teapot effect.

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Computational study of bubble, thin-film dynamics and heat transfer during flow boiling in non-circular microchannels

Municchi,

Markides,

Matar

et al. 2024

Applied Thermal Engineering

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Measurement of transient liquid film and its effect on flow boiling heat transfer in non-circular microchannels

Cited by 10 publications

References 31 publications

Experimental Investigation on the Flow Boiling of Two Microchannel Heat Sinks Connected in Parallel and Series for Cooling of Multiple Heat Sources

Experimental Investigation on the Flow Boiling of Two Microchannel Heat Sinks Connected in Parallel and Series for Cooling of Multiple Heat Sources

The Formation of the Teapot Effect under Different Forces

Computational study of bubble, thin-film dynamics and heat transfer during flow boiling in non-circular microchannels

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