Event
Universality in Decaying Turbulent Flows| Title of the event | Universality in Decaying Turbulent Flows |
| Series | MPI Campus Seminar |
| Organizer | Max-Planck-Institut für biophysikalische Chemie (MPIBPC) |
| Speaker | Christian Küchler |
| Speaker institution | Laboratory for Fluid Physics, Pattern Formation and Biocomplexity |
| Type of event | Seminar |
| Category | Forschung |
| Registration required | Nein |
| Details | The most common state of fluid motion is turbulent flow. Despite its importance for environmental and engineering sciences, our fundamental understanding of turbulence is still very incomplete. A long-standing prediction is the emergence of universal scaling laws in flows where the viscous forces are small compared to the inertial forces. Their scaling exponents contain important information about the fractal dimension of the flow. The sufficient separation of viscous and inertial forces provides an experimental challenge only recently solved by the Max Planck Variable Density Turbulence Tunnel. I show that the relevant statistics in its extremely turbulent flow are universal but remain more complex than anticipated. I trace this effect back to the time-dependence of the turbulent kinetic energy in the flow. This allows the extraction of scaling exponents in good agreement to previous empirical techniques, raises questions regarding the interpretation of earlier results, and might impact practical turbulence models. |
| Date | Start: 27.01.2021, 11:00 Uhr Ende: 27.01.2021 , 12:00 Uhr |
| Location |
Max-Planck-Institut für biophysikalische Chemie (MPIBPC) (Am Faßberg 11) Online |
| Contact |
05513961108 stefan.gloeggler@mpibpc.mpg.de |