Experimental investigation of turbulence in canonical wall bounded flows

Pipe flow and Taylor-Couette flow

Doctoral thesis (2019)

Authors

M. Gül Fluid Mechanics - Mechanical, Maritime and Materials Engineering
Research Group
Fluid Mechanics (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2019 M. Gül
DOI: https://doi.org/10.4233/uuid:1a2adab5-0137-47f2-b8a4-a4949f790f60
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Published Date

2019

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Research Group

Fluid Mechanics

Abstract

This thesis aims to contribute to the physical understanding of turbulence in canonical flows. For that purpose, experiments are conducted in a statistically steady turbulent pipe flow, ramp-type accelerating/decelerating turbulent pipe flow and turbulent Taylor-Couette flow. For the first two flows, time-resolved data is acquired in the cross section of the pipe with stereoscopic PIV. The databases spanning over a friction Reynolds number range of Re⌧ = 340−1259 are utilised to study coherent motions, in particular the large-scale motions and the internal shear layers bounding them. For the turbulent Taylor-Couette flow study, in addition to torque measurements, high resolution stereoscopic-PIV measurements are performed in the radial-axial planes to investigate the hysteresis phenomenon in the system.

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