- Broida 1640 and Zoom
- Physics Department Colloquium
This event will be in-person and on Zoom.
Eberhard Bodenschatz, Max Planck Institute, Gottingen
Clouds, their precipitation and their albedo not only determine our local living conditions, but also long-term climatic conditions on Earth. Clouds are the most turbulent structures on Earth. The beauty of cumulus clouds comes from the multi-scale mixing by eddies. Turbulence, on the other hand, is considered universal, with long-standing predictions about the scaling of the energy spectrum and the moments of velocity differences in space. Here I will report on our experimental studies of clouds and turbulence - both in the laboratory and in the atmosphere. I will show that clouds are very sharp structures in space and discuss the sling effect, which is thought to be important for upscaling cloud droplet size. Finally, I will present our investigations of a fully developed homogeneous isotropic, but decaying turbulence. With our pressurised turbulence facility, we can achieve the highest turbulence levels of any controlled experiment on Earth and obtain surprising results.