Research interests: Fundamental problems in fluid motions dominated by viscosity, which are usually referred to as low-Reynolds-number flows. Applying a combination of theory, computer simulations, and modeling, and experiments, with applications to problems involving a wide range of physical effects, e.g., surface tension, buoyancy, fluid rotation, effects of surfactants, and motions of suspended particles (bubbles, drops, cells, polymers…). The topics cross over from engineering to biology, chemistry, and physics, often using the toolbox of applied mathematics.