Synergistic mechanism of impact dynamics and hydrate phase change of TBAB solution droplets on metallic surfaces with varied wettability

The semi-clathrate hydrate of tetrabutylammonium bromide (TBAB) is a promising phase change material for high-density cold energy storage. However, its disordered adhesion on heat exchange surfaces remains an unresolved challenge. This study explores the coupled impact dynamics and hydrate phase change of TBAB solution droplets on metallic surfaces with varying wettability. A multi-field coupled experimental apparatus was established, utilizing high-speed imaging, infrared thermometry, and a PSO-based Young-Laplace fitting algorithm. The results indicate that the classical model underestimates the maximum spreading factor (