Characterization of perturbation dynamics in unsteady flows
Abstract
While the fluid mechanics community has made significant strides in analyzing fluid flows, examination of complex dynamics with respect to time-varying base states remains a challenge. In this proposed one-year effort, we take a joint theoretical, computational, and experimental approach to extend global stability and resolvent analyses for fluid flows about high-amplitude time-varying base states. The perturbation dynamics of particular interest in this study will be about the unsteady base states caused by a vortical wake, unsteady separation, and unsteady surface motion. With the establishment of the proposed formulation for characterization of perturbation dynamics about time-varying base flows and demonstrations with computationally and experimentally obtained unsteady base flows, we anticipate the capability to expand the horizon of analyzing unsteady fluid flows for a wide range of applications with potential implications for uncovering unsteady flow physics and supporting active flow control strategies based on physical insights.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 09, 2018
- Source ID
- FA95501810040
Entities
People
- Kunihiko Taira
Organizations
- Air Force Office of Scientific Research
- Florida State University
- United States Air Force