TY - JOUR
T1 - Size and speed of jet drops are robust to initial perturbations
AU - Berny, Alexis
AU - Deike, Luc
AU - Popinet, Stéphane
AU - Séon, Thomas
N1 - Funding Information:
This work was supported by the National Science Foundation under Grant No. 1849762 to L.D. and the Cooperative Institute for Earth System modeling between Princeton and GFDL NOAA. A.B. was supported by the International Fund to L.D. from Princeton University during part of this study.
Publisher Copyright:
©2022 American Physical Society
PY - 2022/1
Y1 - 2022/1
N2 - Bubbles bursting at the ocean surface are an important source of sea-spray aerosol. Indeed, a bubble bursting at the surface of a liquid produces a jet that then breaks up leading to several droplets. Here we simulate the bursting of a single bubble by numerical simulation of the axisymmetric two-phases air-water Navier-Stokes equations in the presence of small initial perturbations in the liquid phase. We describe the impact of this random noise on the size and velocity of the drops for a wide range of control parameters. We then demonstrate how the process of jet drop production is robust to perturbations in the initial conditions, which allows an accurate prediction of the size and speed of jet droplets over the entire parameter space. We propose a mechanism to explain why the existence of some droplets, called “primary droplets,” are robust to initial conditions and discuss why the generation of secondary droplets, much smaller than the primary ones, are sensitive to the same initial conditions. The production of these secondary droplets is sensitive to perturbations in the initial conditions through a mechanism of pinch-off escape. This can explain previously published experimental observations of bimodal distributions of jet drops.
AB - Bubbles bursting at the ocean surface are an important source of sea-spray aerosol. Indeed, a bubble bursting at the surface of a liquid produces a jet that then breaks up leading to several droplets. Here we simulate the bursting of a single bubble by numerical simulation of the axisymmetric two-phases air-water Navier-Stokes equations in the presence of small initial perturbations in the liquid phase. We describe the impact of this random noise on the size and velocity of the drops for a wide range of control parameters. We then demonstrate how the process of jet drop production is robust to perturbations in the initial conditions, which allows an accurate prediction of the size and speed of jet droplets over the entire parameter space. We propose a mechanism to explain why the existence of some droplets, called “primary droplets,” are robust to initial conditions and discuss why the generation of secondary droplets, much smaller than the primary ones, are sensitive to the same initial conditions. The production of these secondary droplets is sensitive to perturbations in the initial conditions through a mechanism of pinch-off escape. This can explain previously published experimental observations of bimodal distributions of jet drops.
UR - http://www.scopus.com/inward/record.url?scp=85123305355&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85123305355&partnerID=8YFLogxK
U2 - 10.1103/PhysRevFluids.7.013602
DO - 10.1103/PhysRevFluids.7.013602
M3 - Article
AN - SCOPUS:85123305355
SN - 2469-990X
VL - 7
JO - Physical Review Fluids
JF - Physical Review Fluids
IS - 1
M1 - 013602
ER -