Degree Type


Date of Award


Degree Name

Doctor of Philosophy


Mechanical Engineering

First Advisor

Michael G. Olsen


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



File Format


File Size

187 pages