Heat transfer enhancement of spray cooling by copper micromesh surface

Hu, Yongyan; Lei, Yu; Liu, Xiuliang; Yang, Ronggui

doi:10.1016/j.mtphys.2022.100857

Cited by 8 publications

(3 citation statements)

References 38 publications

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“…97 Furthermore, it is closely related to the surface wettability, the nucleation sites of the bubbles, and the surface area of heat transfer during boiling. 98 After the BISA of the alumina nanofluid, a heterogeneous coating was rapidly generated on the smooth aluminum substrate, which roughened the surface. 99 The larger the concentration of the nanofluid for the BISA was, the rougher the coating surface became after the BISA.…”

Section: Phase-change Heat Transfer On Films With Nanoengineered Surf...mentioning

confidence: 99%

Recent progress in films with nanoengineered surfaces via bubble-induced self-assembly for energy applications

Chu¹,

Fu²,

Wang³

et al. 2023

J. Mater. Chem. A

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Section: Phase-change Heat Transfer On Films With Nanoengineered Surf...mentioning

confidence: 99%

Recent progress in films with nanoengineered surfaces via bubble-induced self-assembly for energy applications

Chu¹,

Fu²,

Wang³

et al. 2023

J. Mater. Chem. A

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“…To address such an issue, this work creatively proposes to arrange multiple sets of ridges perpendicular to each other on superhydrophobic surfaces with an interspace smaller than the droplet diameter, which can not only facilitate the independent retraction of droplet subsets for reducing the capillary inertia time but also diminish the influence of the impact position on the contact time. Specifically, the impact of droplets on copper mesh structures has garnered widespread attention. − For instance, Sen et al discovered that during droplet impact on suspended copper mesh, recoil ejection driven by cavity-collapse singularity could achieve satellite-free ejection of single droplets. This technique can generate monodisperse droplets, replacing traditional nozzles and avoiding issues such as nozzle clogging, thereby achieving breakthroughs in printing technology.…”

Section: Introductionmentioning

confidence: 99%

Droplet Impact on Superhydrophobic Mesh Surfaces

Chen,

Sun,

Zheng

et al. 2024

Langmuir

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Reducing the contact time of droplet impacts on surfaces is crucial for various applications including corrosion prevention and anti-icing. This study aims to explore a novel strategy that greatly reduces contact time using a superhydrophobic mesh surface with multiple sets of mutually perpendicular ridges while minimizing the influence of the impacting location. The effects of the impact Weber numbers and ridge spacing on the characteristics of the impact dynamics and contact time are studied experimentally. The experimental results reveal that, for the droplet impact on mesh surfaces, ridges can segment the liquid film into independently multiple-retracting liquid subunits. The retracted subunits provide the upward driving force, which may promote the splashing or pancake bouncing of droplets. At this point, the contact time has a negligible sensitivity for the impacting position and is significantly reduced by up to 68%. Furthermore, the time, dynamic pressure, and energy criteria for triggering splashing and pancake bouncing are proposed theoretically. This work provides an understanding of the mechanism and the design guidelines for effectively reducing the contact time of the impacting droplet on superhydrophobic surfaces.

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“…With the decrease of size and increase of power for modern electronics, thermal management has become a critical prerequisite to maintain device efficiency and reliability. − By atomizing the cooling agent into microscale droplets and impacting hot substrates, spray cooling exhibits high heat dissipation efficiency and temperature uniformity . However, during the liquid impact process, the splash of liquid droplets result in inhomogeneous heat dissipation and the retraction of spread liquid film reduces the liquid–solid contact area, which hinder the improvement of heat transfer efficiency during the spray cooling process. − Hence, it is significant to study the liquid impact behavior to achieve controllable liquid deposition, which is crucial for thermal management of spray cooling, but also significant for various industrial applications, such as reducing the waste of pesticide in agriculture, improving the precision of patterns during inkjet printing, fabricating uniform functional films by drop-casting, and so forth. − …”

Section: Introductionmentioning

confidence: 99%

Ultrafast Impact Superspreading on Superamphiphilic Silicon Surfaces for Effective Thermal Management

et al. 2023

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Controllable impact spreading behavior is critical for effective thermal management of spray cooling. However, splash and retraction are common problems on hydrophobic (HPB) and hydrophilic (HPL) surfaces. Herein, by regulation of surface wettability, we report a controllable ultrafast impact superspreading behavior (superspreading time of ∼3.0 ms) without splash and retraction on superamphiphilic (SAPL) silicon surfaces. Analysis of dynamic wetting processes combined with observation of lateral force microscopy images on SAPL surfaces reveals the existence of a precursor film at the spreading edge induced by heterogeneous surface wettability at nanoscale. Further study indicates that the inhibition of splash results from the high liquid flux in precursor film, which suppresses the interposition of air at the spreading edge. The reduction of Laplace forces owing to the presence of precursor film inhibits retraction at the spreading frontier. Taking advantage of this impact superspreading behavior on SAPL surfaces, effective heat dissipation is demonstrated, offering uniform and high heat flux for the spray cooling process.

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Heat transfer enhancement of spray cooling by copper micromesh surface

Cited by 8 publications

References 38 publications

Recent progress in films with nanoengineered surfaces via bubble-induced self-assembly for energy applications

Recent progress in films with nanoengineered surfaces via bubble-induced self-assembly for energy applications

Droplet Impact on Superhydrophobic Mesh Surfaces

Ultrafast Impact Superspreading on Superamphiphilic Silicon Surfaces for Effective Thermal Management

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