Wake Transitions Behind a Cube

Qingrui Meng

Research output: ThesisDoctoral Thesis

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Abstract

The wake transition route for flows behind a cube is studied through direct numerical simulations and linear stability analysis. The physical mechanism for regular hairpin-vortex shedding is explained, and the process of the regular bifurcation in the three-dimensional space is characterised by a coupled pitchfork bifurcation model and the unstable eigenspace obtained in the linear stability analysis. The effect of the aspect ratio on the spatio-temporal symmetry of the wakes is discovered after extending the research to general square cross-section bluff bodies. Higher Reynolds number experiments are carried out to measure the drag coefficients of a cuboid-like ROV model.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • The University of Western Australia
Supervisors/Advisors
  • An, Hongwei, Supervisor
  • Cheng, Liang, Supervisor
  • Kimiaei, Mehrdad, Supervisor
Award date20 Oct 2022
DOIs
Publication statusUnpublished - 2022

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