Universality in the viscous-to-inertial coalescence of liquid droplets.
basic_science · Level V
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- Record sourced from PubMed, PMID 31690659.
- Also identified by DOI 10.1073/pnas.1910711116 and PMC identifier 6876233.
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Abstract
We present a theory on the coalescence of 2 spherical liquid droplets that are initially stationary. The evolution of the radius of a liquid neck formed upon coalescence was formulated as an initial value problem and then solved to yield an exact solution without free parameters, with its 2 asymptotic approximations reproducing the well-known scaling relations in the inertially limited viscous and inertial regimes. The viscous-to-inertial crossover observed in previous research is also recovered by the theory, rendering the collapse of data of different viscosities onto a single curve.