The physics of turbulent multiphase flows is one of the most interesting areas in engineering and science. Multiphase systems are composed of at least a carrier (continuous) phase, which is typically liquid or gas, and the dispersed phase, which can be gas, liquid, or solid. My specific interest is the behaviour of systems of two fluids separated by a deformable interface: gas/liquid dispersions and liquid/liquid emulsions. These systems are used in numerous applications in engineering processes and everyday life: production of consumable goods (food, cosmetics, pharmaceuticals); oil and gas transportation; and chemical engineering (emulsification, phase separation, polymerization). The complexity of two immiscible fluid flow gives rise to numerous fundamental questions of fluid mechanics. The ability to control turbulent multiphase systems is challenging and it is a major factor for the safe and efficient operation of any processes involving dispersions and emulsions.