Coalescence of two growing bubbles in a Hele-Shaw cell.

ABSTRACT: An understanding of the dynamics of growth-driven coalescence is important in diverse fields across natural science and engineering. Motivated by the bubble coalescence in magma during volcanic eruptions, we study both experimentally and theoretically the coalescence of two growing bubbles in a Hele-Shaw cell. In our system, bubbles grow by gas expansion due to decompression and the diffusional influx of dissolved gas in the liquid. Our experiments show that the evolution of film thickness and bubble shape depends on viscosity, decompression rate, and cell gap. Through a scaling analysis and a perturbation approximation, we find that the hydrodynamic interaction between two bubbles is characterized by a film capillary number [Formula: see text] depending on viscosity [Formula: see text], b

SUBMITTER: Ohashi M 

PROVIDER: S-EPMC8786952 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature