Abstract: This paper explores the role of barodiffusion in the dynamics of gas bubble growth in highly viscous gas-saturated magma subjected to instant decompression. A mathematical model describing the growth of a single isolated bubble is formulated in terms of the modified Rayleigh–Plesset equation coupled with the mass transfer and material balance equations. The model simultaneously takes into account both dynamic and diffusion mechanisms, including the effect of barodiffusion caused by emergence of a large pressure gradient in the liquid, which, in turn, is associated with formation of a diffusion boundary layer around the bubble. An analytical solution of the problem is found, the construction of which is based on the existence of a quasi-stationary state of the bubble growth process. It is shown that barodiffusion manifests itself at the initial and transient stages and under certain conditions can play a paramount role.

Cite: Chernov A.A. , Davydov M.N. , Ermanyuk E.V.
Dynamics of the growth of a gas bubble in a magmatic melt during its decompression: the effect of barodiffusion
Journal of Fluid Mechanics. 2025. V.1018. A6 :1-18. DOI: 10.1017/jfm.2025.10503

Dates:

Submitted:	Jun 24, 2024
Accepted:	Jul 23, 2025

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