Degree Type

Dissertation

Date of Award

2014

Degree Name

Doctor of Philosophy

Department

Mechanical Engineering

First Advisor

Michael G. Olsen

Abstract

Turbulent mixing processes in three different flow configurations are studied using a combination of experimental data and computational fluid dynamics. The turbulent transport of a passive scalar in a wake and jet with co-flow in a rectangular reactor is studied using large eddy simulation and experimental data from particle image velocimetry (PIV), planar laser-induced fluorescence (PLIF), and simultaneous PIV/PLIF. In addition, the vortex flow in a four-inlet vortex reactor is studied by means of Reynolds-averaged Navier-Stokes simulations and stereo-PIV. The investigations shed light on the flow features and mixing mechanisms of the flows and provide in-depth evaluation of the effect of simulation parameters and performance of the numerical methods.

This work shows that computational fluid dynamics in combination with PIV/PLIF data is an excellent tool to study mixing in the current flow configurations. Furthermore, this work demonstrates the value of in-depth evaluation of CFD methods.

Copyright Owner

Katrine Marsteng Nilsen

Language

en

File Format

application/pdf

File Size

187 pages

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