International Journal of Multiphase Flow· 2026Q1
Bubbles, dry patches, and contact line dynamics leading to the boiling crisis in thin liquid film at droplet impact onto hot surfaces
- 0citations
- Q1SCImago
- 2026year
Short summary
A new automated pipeline using machine learning-driven computer vision quantifies bubble and dry patch dynamics during droplet impact on hot surfaces, enabling prediction of the boiling crisis.
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Key points
- Developed an automated pipeline using machine learning for high-speed imaging analysis of droplet impact on hot surfaces.
- Quantitatively tracks hundreds of bubbles and dry patches, measuring their size, interaction, and contact line dynamics.
- Identifies bubble coalescence, breakup, and dry patch formation as precursors to the boiling crisis.
- Enables prediction of the transition to boiling crisis through analysis of dry patch and contact line dynamics.
AI-generated from the title and abstract; the full text is not read.
Abstract
Understanding and predicting the transition from nucleate boiling regime to the boiling crisis in a thin liquid film is important for numerous applications, such as the thermal management of power electronics and nuclear power plants. The processes of bubble coalescence, their breakup, and dry patch formation precede the boiling crisis. Here, we present a study on the dynamics of bubbles and dry patches, as well as the contact lines formed around dry patches and at the periphery of a spreading liquid droplet when it impacts a hot, smooth surface at different Weber numbers and substrate temperatures. The investigation is conducted using high-speed imaging, machine learning-assisted computer vision, and statistical analysis. The automated pipeline has been developed for the tracking and analysis of hundreds of bubbles and dry patches with high temporal resolution. This Convolutional Neural Network analysis extracts quantitative descriptors of size and interaction of the bubbles and dry patches, contact line length, and density. Finally, the transition from contact boiling to transition boiling, which subsequently leads to a boiling crisis, can be predicted through analysis of the dry patch and contact line dynamics.
The authors' abstract, as published at the source. International Journal of Multiphase Flow, 2026 · DOI ↗
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