NUMERICAL-SIMULATION OF SUPEROSCILLATIONS OF A TRITON-BEARING DROP INMICROGRAVITY

Large-amplitude nonlinear oscillations of an axially symmetric water d rop of volume 7.33 cm(3), initial aspect ratio 3.4, with surfactant Tr iton X-100 of 1.4 x 10(-4) g ml(-1) (1 CMC), in microgravity are compa red with predictions of the boundary-integral method. The small shear viscosity of the bulk phase, as well as the surface dilatational visco sity and surface shear viscosity are considered. When a very specific set of material properties is assumed, numerical simulations of the dr op oscillations are in good agreement with the experimental results of drop oscillations measured in space during the second United States M icrogravity Laboratory, USML-2 The obtained surface viscosities are in rough agreement with literature values.