Instability and Transition in Bent Pipes

Event Sponsor: 
Mathematics and Computer Science Division LANS Seminar
Start Date: 
Jul 13 2016 - 3:00pm
Building/Room: 
Building 240/Room 1404-1405
Location: 
Argonne National Laboratory
Speaker(s): 
Jacopo Canton
Speaker(s) Title: 
KTH
Host: 
Oana Marin

Bent pipes are ubiquitous in both man-made devices and biological systems, and are of great interest to both the industrial and the medical communities. The present talk gives an overview on different dynamics of the newtonian, incompressible flow inside toroidal and spatially developing ('elbow') pipes. The focus is on the mechanisms that lead the flow from a stable, steady-state trough instability and, ultimately, transition to turbulence. Special attention is paid to toroidal pipes, which allow to isolate the effect that the curvature has on the flow and the instability mechanisms. The methods employed range from linear (modal) stability analysis, to fully non-linear direct numerical simulations and non-linear adjoints.

Miscellaneous Information: 

Coffee and goodies will be served.