  Emulsions are common in many natural and industrial settings. Recently, much
attention has been put on understanding the dynamics of turbulent emulsions.
This paper reviews some recent studies of emulsions in turbulent Taylor-Couette
flow, mainly focusing on the statistics of the dispersed phase and the global
momentum transport of the system. We first study the size distribution and the
breakup mechanism of the dispersed droplets for turbulent emulsions with a low
volume-fraction (dilute) of the dispersed phase. For systems with a high
volume-fraction of the dispersed phase (dense), we address the detailed
response of the global transport (effective viscosity) of the turbulent
emulsion and its connection to the droplet statistics. Finally, we will discuss
catastrophic phase inversions, which can happen when the volume fraction of the
dispersed phase exceeds a critical value during dynamic emulsification. We end
the manuscript with a summary and an outlook including some open questions for
future research. This article is part of the theme issue `Taylor-Couette and
Related Flows on the Centennial of Taylor's Seminal Philosophical Transactions
Paper'.
