Applications of stochastic estimation in the axisymmetric sudden expansion

Daniel R. Cole, Mark N. Glausen

Research output: Contribution to journalArticle

33 Scopus citations

Abstract

Stochastic estimation was utilized to reconstruct estimates of multipoint conditional averages in an axisymmetric sudden expansion. Application of this technique requires, in addition to the two-point correlation tensor, time series data measured at selected positions simultaneously. One application of this technique yielded estimates of the spatial and temporally evolving velocity field in a given azimuthal plane of the sudden expansion. An application of this technique in the reattachment region clearly shows its unsteady character. The spectra measurements as well as the stochastic estimates utilizing multipoint conditions applied over two directions suggest that coherent structures from the near field shear layer propagate downstream into the reattachment region and cause this unsteadiness.

Original languageEnglish (US)
Pages (from-to)2941-2949
Number of pages9
JournalPhysics of Fluids
Volume10
Issue number11
DOIs
StatePublished - Jan 1 1998
Externally publishedYes

ASJC Scopus subject areas

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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