Visualization research on confined bubble growth feature and heat transfer characteristic in ultra-shallow micro channel

Hong, Sihui; Tang, Yongchao; Lai, Yongxin; Wang, Shuangfeng; Zhang, Li‐Zhi

doi:10.1016/j.ijheatmasstransfer.2016.07.080

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…However, bubbling events consistently involve multiple phases and take place at the nanometer and up to nanosecond scales (especially at the nucleation stage); [ 8 ] these characteristics make it one of the most difficult occurrences to be directly investigated. Common experimental probes, including both spectroscopic (e.g., Raman) [ 1b,9 ] and imaging methods (e.g., atomic force microscopy (AFM) and optical microscopy), [ 7b,10 ] have been utilized for the characterizations of static bubbles (i.e., postmortem examination), whereas the nanobubbling dynamics have also been studied by various optical microscopes (for example, single nanobubble formation by optical microscopy, [ 11 ] nucleation and growth of individual hydrogen nanobubbles by super‐resolution fluorescence microscopy, [ 12 ] and nucleation of single nanobubbles at the sub‐second timescale by surface plasmon resonance microscopy. [ 8a ] ).…”

Section: Introductionmentioning

confidence: 99%

Visualization of Bubble Nucleation and Growth Confined in 2D Flakes

Zhang

Qiang

Wang

et al. 2021

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The nucleation and growth of bubbles within a solid matrix is a ubiquitous phenomenon that affects many natural and synthetic processes. However, such a bubbling process is almost “invisible” to common characterization methods because it has an intrinsically multiphased nature and occurs on very short time/length scales. Using in situ transmission electron microscopy to explore the decomposition of a solid precursor that emits gaseous byproducts, the direct observation of a complete nanoscale bubbling process confined in ultrathin 2D flakes is presented here. This result suggests a three‐step pathway for bubble formation in the confined environment: void formation via spinodal decomposition, bubble nucleation from the spherization of voids, and bubble growth by coalescence. Furthermore, the systematic kinetics analysis based on COMSOL simulations shows that bubble growth is actually achieved by developing metastable or unstable necks between neighboring bubbles before coalescing into one. This thorough understanding of the bubbling mechanism in a confined geometry has implications for refining modern nucleation theories and controlling bubble‐related processes in the fabrication of advanced materials (i.e., topological porous materials).

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Section: Introductionmentioning

confidence: 99%

Visualization of Bubble Nucleation and Growth Confined in 2D Flakes

Zhang

Qiang

Wang

et al. 2021

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“…Hence, the mass transfer towards the bubble is altered and the bubble shape is modified (Zu et al 2011;Bao et al 2017). Ultimately, bubbles can grow up to a point that they fully block the channel (Hong et al 2016), impeding mass transport and causing clogging. In these cases, heat (Barber et al 2010;Yin & Jia 2016) and mass transfer considerations are essential to understand bubble growth (Evans & Machniewski 1999).…”

Section: Introductionmentioning

confidence: 99%

“…Ultimately, bubbles can grow up to a point that they fully block the channel (Hong et al. 2016), impeding mass transport and causing clogging. In these cases, heat (Barber et al.…”

Section: Introductionmentioning

confidence: 99%

Diffusive growth of successive bubbles in confinement

2019

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“…Hence, the mass transfer towards the bubble is altered and the bubble shape is modified [102,105]. Ultimately, bubbles can grow up to a point that they fully block the channel [106], impeding mass transport and causing clogging. In these cases, heat [100,107] and mass transfer considerations are essential to understand bubble growth [108].…”

Section: Introductionmentioning

confidence: 99%

Bubbles on surfaces : diffusive growth and electrolysis

Soto¹

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The history effect on bubble growth and dissolution. Part 2. Experiments and simulations of a spherical bubble attached to a horizontal flat plate, J. Fluid Mech. 820, 479-510 (2017) † Experiments performance and analysis by Á. Moreno Soto and P. Peñas-López. Á. Moreno Soto wrote the experimental section of the article and its review. P. Peñas-López was the head of the project and took care of the numerical analysis and the writing. All the authors discussed the results and proofread the article. 2Gas depletion through single gas bubble diffusive growth * When a gas bubble grows by diffusion in a gas-liquid solution, it affects the distribution of gas in its surroundings. If the density of the solution is sensitive to the local amount of dissolved gas, there is the potential for the onset of natural convection, which will affect the bubble growth rate. The experimental study of the successive quasi-static growth of many bubbles from the same nucleation site described in this paper illustrates some consequences of this effect. The enhanced growth due to convection causes a local depletion of dissolved gas in the neighbourhood of each bubble beyond that due to pure diffusion. The quantitative data of sequential bubble growth provided in the paper show that the radius-versus-time curves of subsequent bubbles differ from each other due to this phenomenon. A simplified model accounting for the local depletion is able to collapse the experimental curves and to predict the progressively increasing bubble detachment times.

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Visualization research on confined bubble growth feature and heat transfer characteristic in ultra-shallow micro channel

Cited by 10 publications

References 22 publications

Visualization of Bubble Nucleation and Growth Confined in 2D Flakes

Visualization of Bubble Nucleation and Growth Confined in 2D Flakes

Diffusive growth of successive bubbles in confinement

Bubbles on surfaces : diffusive growth and electrolysis

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