Correlation of the surface pressure distribution on a circular cylinder with objective identification of vortex formation and shedding

Matthew P. Rockwood, Melissa A Green

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Numerical simulation of the unsteady wake downstream of a circular cylinder was studied by comparing the cylinder static pressure distribution and the results from a Lagrangian finite-time Lyapunov exponent (FTLE) analysis. The location and evolution of Lagrangian saddle points found using FTLE in the flow were tracked to facilitate the understanding of vortex shedding physics in the near-wake region, and their motion was compared with the simultaneous static pressure distribution on the cylinder surface. Relating the Lagrangian saddle dynamics to a quantity that is measurable in real-time allows for sensing of the Lagrangian saddle point location. The Lagrangian saddle point acceleration away from the cylinder surface was found to coincide with the increase of the static pressure at 100° from the mean cylinder stagnation point.

Original languageEnglish (US)
Title of host publication54th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103933
StatePublished - 2016
Event54th AIAA Aerospace Sciences Meeting, 2016 - San Diego, United States
Duration: Jan 4 2016Jan 8 2016

Other

Other54th AIAA Aerospace Sciences Meeting, 2016
CountryUnited States
CitySan Diego
Period1/4/161/8/16

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ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

Rockwood, M. P., & Green, M. A. (2016). Correlation of the surface pressure distribution on a circular cylinder with objective identification of vortex formation and shedding. In 54th AIAA Aerospace Sciences Meeting American Institute of Aeronautics and Astronautics Inc, AIAA.