Subpixel Resolution Schemes for Multiphase Flows

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.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Engineering Science and Mechanics

Department dc:contributor.department

Engineering Science and Mechanics

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

2006

Author dc:creator

• Brady, Michael Richard

Chair dc:contributor.committeechair

• Vlachos, Pavlos P.

Committee members dc:contributor.committeemember

• Telionis, Demetri P.
• Yoon, Roe-Hoan

• Subpixel Resolution
• Multiphase flows
• Spray Dynamics
• Particle Tracking Velocimetry
• Particle Image Velocimetry

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Dc Identifier Other

etd-12132006-032833

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/36104