Séminaire de Mécanique d'Orsay

Le Jeudi 9 avril à 14h00 - Salle de conférences du FAST

Simultaneous temperature and velocity imaging in fluid flows using thermographic phosphor tracer particles.

Benoit Fond, Christopher Abram et Frank Beyrau
Department of Mechanical Engineering, Imperial College London

Planar high-speed temperature and velocity measurements in fluid flows can be performed simultaneously using micrometer-sized thermographic phosphor particles as tracers. The particle Mie scattering signal is recorded to determine the velocity using a conventional PIV approach and the luminescence emission is detected to determine the tracer temperature using a two-colour method. Validation of this concept and applications in turbulent flows are presented.

Figure caption:
Temporal evolution of the temperature and velocity fields in the wake of a heated cylinder. Every fifteenth image of the 3kHz recording is displayed. From C. Abram, B. Fond, A. L. Heyes and F. Beyrau, Appl. Physics B (2013), 111 115-160.