Kumar, Aloke; Cierpka, Christian; Williams, Stuart J.; Kähler, Christian J.; Wereley, Steven T.
Document type:
Konferenzbeitrag / Conference Paper
Title:
3D3C velocimetry measurements of an electrothermal microvortex using wavefront deformation PTV and a single camera
Conference title:
International Symposium on Applications of Laser Techniques to Fluid Mechanics (15., 2010, Lissabon)
Conference title:
15th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, July 5-8
Venue:
Lissabon
Year of conference:
2010
Date of conference beginning:
05.07.2010
Date of conference ending:
08.07.2010
Year:
2010
Language:
Englisch
Abstract:
We study the three-dimensional nature of a toroidal electrothermal microvortex (EMV) by using wavefront deformation particle tracking velocimetry (PTV) developed at the Universität der Bundeswehr München. A cylindrical lens is used in conjunction with a microscope objective lens to create systematic wavefront deformations in the particle images. The particles are observed by a single camera and appear as ellipses. The elliptical nature of the particle images encodes out-of-plane information regarding the particle's position. This new technique is ideally suited for measuring transport in the EMV and provides the full threedimensional, time resolved particle trajectories with Lagrangian velocity and acceleration. Numerical simulations compare well with experimental measurements. «
We study the three-dimensional nature of a toroidal electrothermal microvortex (EMV) by using wavefront deformation particle tracking velocimetry (PTV) developed at the Universität der Bundeswehr München. A cylindrical lens is used in conjunction with a microscope objective lens to create systematic wavefront deformations in the particle images. The particles are observed by a single camera and appear as ellipses. The elliptical nature of the particle images encodes out-of-plane information rega... »
Department:
Fakultät für Luft- und Raumfahrttechnik
Institute:
LRT 7 - Institut für Strömungsmechanik und Aerodynamik