Vortex identification in turbulent flows: Isotropic, sphere wake

P. Chakraborty, S. Balachandar, Ronald Adrian

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

1 Scopus citations

Abstract

Vortices, the regions of swirling coherent motion of fluid, are of fundamental importance in understanding the dynamics of turbulent flows. Recent advances in computational and experimental resources have resulted in massive volumes of highly resolved flow field data. Identification of coherent vortex structures from these space-time discretized flow dataset is the key issue of vortex identification. We consider identification schemes based on pointwise analysis of the velocity gradient tensor. A new measure of the local spatial coherence in a vortex is introduced. Different criteria are compared for two classes of turbulent flows: Isotropic and sphere wake. Remarkably similar vortex structures are observed using the Q, λ2 and swirling strength criterion. An explanation based on swirling strength and the proposed local coherence measure is offered for this observation.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME/JSME Joint Fluids Engineering Conference
EditorsA. Ogut, Y. Tsuji, M. Kawahashi, A. Ogut, Y. Tsuji, M. Kawahashi
Pages819-824
Number of pages6
Volume1 B
Publication statusPublished - 2003
Externally publishedYes
Event4th ASME/JSME Joint Fluids Engineering Conference - Honolulu, HI, United States
Duration: Jul 6 2003Jul 10 2003

Other

Other4th ASME/JSME Joint Fluids Engineering Conference
CountryUnited States
CityHonolulu, HI
Period7/6/037/10/03

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ASJC Scopus subject areas

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

Chakraborty, P., Balachandar, S., & Adrian, R. (2003). Vortex identification in turbulent flows: Isotropic, sphere wake. In A. Ogut, Y. Tsuji, M. Kawahashi, A. Ogut, Y. Tsuji, & M. Kawahashi (Eds.), Proceedings of the ASME/JSME Joint Fluids Engineering Conference (Vol. 1 B, pp. 819-824)