---
abstract: 'We consider a spherical variant of the Faraday problem, in which a spherical drop is subjected to a time-periodic body force, as well as surface tension. We use a full three-dimensional parallel front-tracking code to calculate the interface motion of the parametrically forced oscillating viscous drop, as well as the velocity field inside and outside the drop. Forcing frequencies are chosen so as to excite spherical harmonic wavenumbers ranging from 1 to 6. We excite gravity waves for wavenumbers 1 and 2 and observe translational and oblate-prolate oscillation, respectively. For wavenumbers 3 to 6, we excite capillary waves and observe patterns analogous to the Platonic solids. For low viscosity, both subharmonic and harmonic responses are accessible. The patterns arising in each case are interpreted in the context of the theory of pattern formation with spherical symmetry.'
bibliography:
- 'sphere.bib'
title: |
    Faraday instability on a sphere:\
    numerical simulation
---

[*published in Journal of Fluid Mechanics [**870**]{}, 433-459 (2019)*]{}

Introduction
============

The [@Far1831] instability, in which the interface between two superposed fluid layers subjected to periodic vertical vibration of sufficient amplitude forms sustained standing wave patterns, has been instrumental in the study of pattern formation, leading to the discovery 