Sculpting with Flow: Mudballs, Meteorites, and Candy Landscapes

Series/Event Type: 

In recent years in the NYU-Courant Applied Math Lab, we've ventured into the field of geomorphology, which seeks to describe the changing face of the Earth, its structures, landforms and landscapes. In such problems, solids are reshaped by processes such as erosion/deposition, dissolution/solidi cation and melting/freezing and flows are inevitably present. I will discuss a few case studies, starting with how an erodible body is robustly reshaped by flow into a peculiar shape. I will also point out an unexpected connection to the flight of meteoroids, which are carved into unique shapes by ablation during atmospheric flight. Lastly, I'll mention some very recent work on dissolving boundaries and how the flows naturally present during dissolution tend to carve otherworldly "landscapes" out of candy.

Leif Ristroph, New York University
Bowen Hall
Room number or other detail: 
Bowen Hall Room 222
Friday, September 27, 2019 - 12:30pm

Speaker Bio

Over the last six years, I've been a Professor of Mathematics at NYU and the Courant Institute, where I lead the experimental effort in the Applied Math Lab (AML). Prior I was also at the AML as an NSF postdoctoral researcher working with Jun Zhang, Mike Shelley and Steve Childress. I received my PhD in physics from Cornell University, where I studied the aerodynamics of insect flight under Itai Cohen and Jane Wang. And my Bachelor's studies were in physics at the University of Texas at Austin, where I worked with Harry Swinney on fluid-fluid interfacial instabilities.