University of Minnesota
Aerospace Engineering and Mechanics
Spring 2000 Seminar Series



Effects of Boundary Conditions on Vortex Breakdown Simulation


Professor Sidney Leibovich

Sibley School of Mechanical & Aerospace Engineering, Cornell University


Abstract

Theories of vortex breakdown are constrained by the assumption of axial symmetry and steady flow. Neither assumption is approximated in aerodynamic vortices suffering breakdown. To what extent is it possible to infer information about the occurrence, location, and nature of a vortex breakdown event from the available theories? These questions are difficult to address by laboratory experiments. Numerical experiments can help, but the difficulties of numerical simulation in this problem are more severe than in many other fluid mechanical problems. The elements leading to the numerical difficulties are discussed. Questions posed about vortex breakdown are then revisited in the light of recent numerical experiments.


Friday, February 4, 2000
209 Akerman Hall
2:30-3:30 p.m.


Refreshments served after the seminar in 227 Akerman Hall.
Disability accomodations provided upon request.
Contact AEM Department, at (612) 625-8000.