Fully developed turbulence is one of the big unsolved problems in fluid dynamics. The main question is the distribution of rare events, which has important implications for, e.g., flight safety. We approach this problem from a fundamental point of view, both experimentally, theoretically, and numerically.

One particular important type of turbulence is turbulence (partly) driven by body forces, such as buoyancy. This can happen by either thermally driving the turbulence or also by driving the turbulence through bubbles or dispersed particles. Both will be advected by the flow but also act back on the surrounding liquid (two-way coupling). To be able to describe flow with many bubbles or particles efficiently, one needs an effective force description, on which and with which we work in several projects within our group. Finally, we are also interested in the radial dynamics of single bubbles in hydrodynamic or acoustic fields.

Current projects:
Light Particles in Turbulent Flows (Twente Water Tunnel)
Bubbly Drag Reduction and Turbulent Taylor-Couette Flow (T3C)
Thermal Convection
	High Rayleigh Number Thermal Convection
	Rotating Thermal Convection
	Multiphase Rayleigh-Bénard Convection
Forces on Bubbles and Particles in Rotating Flows
Impact on Water Surfaces

Finished projects:
Sonoluminescence
Sound (and Light) of the Snapping shrimp
Leonardo's Paradox: the Spiraling Bubble