Development of Large-Scale Particle Tracking Velocimetry: A Comparison Between 2D and 3D Techniques
Loading...
Authors
Fisher, Carolyn
Date
Type
thesis
Language
eng
Keyword
PTV , Particle Tracking Velocimetry , Wind Measurements
Alternative Title
Abstract
This study compares the three-dimensional version of a previously proposed large-scale particle tracking velocimetry (LS-PTV) measurement system with a simpler, less computationally expensive, two-dimensional version for use in in-situ measurements.
The LS-PTV (3D) system was used as a baseline for measuring wind flow over a flat roof in a 3m x 3m x 1.5m volume.
The LS-PTV (2D) system covered a 1.5m x 3m plane within the same volume.
A 3D ultrasonic anemometer was used outside of the measurement volume as a means to validate the LS-PTV measurements.
An analytical model of the bubbles used as tracer particles for the LS-PTV measurements determined that the bubbles were able to resolve fluid length-scales 0.25m or larger, which was within the size of the measurement volume.
Despite being more susceptible to errors due to incomplete background image subtraction, which was responsible for noise in the tracking algorithm, the LS-PTV (2D) system was able to track approximately 80% more bubbles and at a lower spatial uncertainty than the LS-PTV (3D) system.
The LS-PTV (2D) system was unable to measure an exact projection of the LS-PTV (3D) results, which was a result of the LS-PTV systems tracking different bubbles within the same flow field.
Both LS-PTV systems were found to measure the same velocities and Reynolds stresses within the field, and the missing vertical component from the LS-PTV (2D) measurements was deemed negligible.
Description
Citation
Publisher
License
Queen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canada
ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.
ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.