Coherent structures in compressible free-shear-layer flows | Zendy

D.P. Aeschliman | Zendy; Roy Baty | Zendy; Cille Kennedy | Zendy; Jacqueline H. Chen | Zendy

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Coherent structures in compressible free-shear-layer flows

Author(s) -

D.P. Aeschliman,

Roy Baty,

Cille Kennedy,

Jacqueline H. Chen

Publication year - 1997

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/527559

Subject(s) - laminar flow , compressibility , turbulence , shear (geology) , mechanics , lagrangian coherent structures , eddy , geology , scale (ratio) , materials science , physics , petrology , quantum mechanics

Large scale coherent structures are intrinsic fluid mechanical characteristics of all free-shear flows, from incompressible to compressible, and laminar to fully turbulent. These quasi-periodic fluid structures, eddies of size comparable to the thickness of the shear layer, dominate the mixing process at the free-shear interface. As a result, large scale coherent structures greatly influence the operation and efficiency of many important commercial and defense technologies. Large scale coherent structures have been studied here in a research program that combines a synergistic blend of experiment, direct numerical simulation, and analysis. This report summarizes the work completed for this Sandia Laboratory-Directed Research and Development (LDRD) project

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