  We study the effect of surfactant on the dynamics of a bubble bursting
through an interface. We perform fully three-dimensional direct numerical
simulations using a hybrid interface-tracking/level-set method accounting for
surfactant-induced Marangoni stresses, sorption kinetics, and diffusive
effects. We select an initial bubble shape corresponding to a large Laplace
number and a vanishingly small Bond number in order to neglect gravity, and
isolate the effects of surfactant on the flow. Our results demonstrate that the
presence of surfactant affects the dynamics of the system through
Marangoni-induced flow, driving motion from high to low concentration regions,
which is responsible for the onset of a recirculation zone close to the free
surface. These Marangoni stresses rigidify the interface, delay the cavity
collapse, and influence the jet breakup process.
