Abstract
The growth dynamics of bubbles has been extensively studied for several decades. However, a thorough understanding of the morphological evolution of bubbles on pore-patterned surfaces through the coalescence of adjacent bubbles induced by expansion is still lacking. This study aims to quantitatively investigate the coalescence of adjacent bubbles in drops on customized microscale pore-patterned surfaces from the bottom view under different atmospheric pressures. The results demonstrate that the coalescence status and the size of bubbles can be controlled by adjusting the atmospheric pressure and are also in good agreement with the theoretical analysis results. This work provides insight into the underlying physics of growing bubbles on a pore-patterned surface; this is important for research on gas–fluid–solid interfacial slips and surface drag reduction.
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