Hoa Nguyen and Orrin Shindell
The most numerous organisms on Earth are also the smallest. Over the past four billion years, single-celled and simple multicellular organisms have evolved motility mechanisms particularly-suited for locomotion in their low Reynolds number environment. Considerable progress has been made to understand biological processes and fluid dynamics at this small scale over the past fifty years. Simulations and experiments have shed light on the complex locomotion strategies spanning from a lone single cell to collective groups of cells in Newtonian and non-Newtonian fluids. In this two-part mini-symposium, researchers studying the locomotion of simple organisms through computer simulations, fluid dynamics theory, and experimental measurements, will present their results. The diversity of these presentations shows the importance of the coordination between modeling and experiments to further our knowledge of the interactions of organisms and their surrounding fluid environment.