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Yoshiyuki Sakai

Coherent structures and secondary motions in open duct flow

(Dissertationsreihe am Institut für Hydromechanik, Karlsruher Institut für Technologie ; 2019)

AutorSakai, Yoshiyuki

VerlagKIT Scientific Publishing, Karlsruhe

ISBN9783731507901

UmfangXXVI, 174 S.

Veröffentlicht
am:
22.08.2019

Erscheinungs-
jahr
2019

Verfügbarkeit04

Downloads:

Für Zitate bitte die folgende URL verwenden:
http://dx.doi.org/10.5445/KSP/1000082066

Abstract

This book addresses the turbulence-driven mean secondary motions in straight open duct flow with rectangular cross-section. Despite its weak intensity, the secondary flow influences the primary velocity distribution significantly. Coherent structure analysis showed that the secondary flow is the statistical footprint of quasi-streamwise vortices, and the unique mean flow pattern is a consequence of a vortex sorting mechanism that is only effective in the vicinity of free surface.