| Type of Document |
Master's Thesis |
| Author |
Brady, Michael Richard
|
| Author's Email Address |
|
| URN |
etd-12132006-032833 |
| Title |
Subpixel Resolution Schemes for Multiphase Flows |
| Degree |
Master of Science |
| Department |
Engineering Science and Mechanics |
| Advisory Committee |
| Advisor Name |
Title |
| Vlachos, Pavlos P. |
Committee Chair |
| Telionis, Demetri P. |
Committee Member |
| Yoon, Roe-Hoan |
Committee Member |
|
| Keywords |
- Subpixel Resolution
- Multiphase flows
- Spray Dynamics
- Particle Tracking Velocimetry
- Particle Image Velocimetry
|
| Date of Defense |
2006-10-20 |
| Availability |
unrestricted |
Abstract
This effort explores novel sub-resolution particle center estimation algorithms for Digital Particle Tracking Velocimetry (DPIV). The errors of these new methods were classified through Monte-Carlo simulations. These schemes provide direct measurements of the apparent particle image diameter and the subpixel position. The new methods significantly reduce the bias error due to pixel discretization, thus reducing the total error in the position and sizing measurement compared to the classic three point and least squares Gaussian estimators. In addition, the accuracy of the least-squares fits were essentially independent of the true particle diameter and significantly reduced the particle position error compared with current estimation schemes. The results of the Monte Carlo simulations were validated in a high pressure spray atomization experiment.
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| Files |
| Filename |
Size |
Approximate Download Time
(Hours:Minutes:Seconds)
|
| 28.8 Modem |
56K Modem |
ISDN (64 Kb) |
ISDN (128 Kb) |
Higher-speed Access |
| |
brady-MSthesis.pdf |
762.11 Kb |
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