The bubble merger in rectangular microchannels during boiling processes based on conjugate heat transfer

Zhang, Zheng; Zhang, Guanmin; Zhang, Jingzhi; Tian, Maocheng; Li, Shanwei

doi:10.1016/j.applthermaleng.2024.123093

Applied Thermal Engineering

2024

DOI: 10.1016/j.applthermaleng.2024.123093

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The bubble merger in rectangular microchannels during boiling processes based on conjugate heat transfer

Zheng Zhang,

Guanmin Zhang,

Jingzhi Zhang

et al.

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Cited by 3 publications

References 49 publications

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Gradient-constrained algorithm for simulating bubble growth in microchannel boiling flow using volume of fluid method

Gao,

Zhai,

Yan

2025

Engineering Analysis with Boundary Elements

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Gradient-constrained algorithm for simulating bubble growth in microchannel boiling flow using volume of fluid method

Gao,

Zhai,

Yan

2025

Engineering Analysis with Boundary Elements

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Effect of wall contact angle on the conjugate heat transfer for flow boiling processes in rectangular microchannels

Wang,

Li,

et al. 2024

Physics of Fluids

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Microchannel boiling heat transfer offers a promising solution to address extreme high heat flux in miniaturized and high-density integrated electronic devices. In this work, we performed numerical studies to elucidate the complex flow boiling process in a square microchannel using the open-source platform OpenFOAM. The governing equations of the two-phase flow was solved based on the finite volume framework, and the surface tension together with phase change models were incorporated to study the wettability and conjugate heat transfer in the microchannel. First, the stability of the liquid film shows that smaller contact angles lead to thicker and stable liquid films near the solid wall, while larger contact angles result in thinner and fragile films. Second, the heat transfer, represented by the dimensionless parameter Nu, shows that smaller contact angles result in higher and more uniform distribution of Nu. The velocity gradient causes the Nu to be higher for the sidewalls than for the bottom wall. The contact angle also affects the peak value of Nu. Small contact angles result in large solid wall temperature gradients and more efficient heat transfer. Finally, the simulation results show that smaller thermal conductivity of the solid results in larger temperature gradient in the flow direction, implying that the conjugate heat transfer is less efficient. Overall, the present numerical findings provide useful guidance for efficient thermal management in electronic devices.

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Study of the Dynamics of a Single Bubble

Pavlenko,

Koshlak

2024

Energies

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The behaviour of bubbles in cavitation and boiling processes is determined by the thermodynamic parameters of the two-phase medium and the intensity of heat and mass transfer, which affect the final dynamic effects. In this review, we analyse the influences of these factors on bubble behaviour, as described in existing mathematical models. In particular, we analyse the physical processes that govern bubble behaviour, the influence of mass transfer, vapor and liquid temperature, vapour, and liquid pressure on the inertial and dynamic stages of development. In conclusion, we summarize the problems associated with modelling, the accuracy of numerical predictions, and propose directions for further research.

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The bubble merger in rectangular microchannels during boiling processes based on conjugate heat transfer

Cited by 3 publications

References 49 publications

Gradient-constrained algorithm for simulating bubble growth in microchannel boiling flow using volume of fluid method

Gradient-constrained algorithm for simulating bubble growth in microchannel boiling flow using volume of fluid method

Effect of wall contact angle on the conjugate heat transfer for flow boiling processes in rectangular microchannels

Study of the Dynamics of a Single Bubble

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