V Hohreiter et al 2002 Meas. Sci. Technol. 13 1072 doi:10.1088/0957-0233/13/7/314
V Hohreiter1, S T Wereley2,4, M G Olsen3 and J N Chung1
Show affiliationsThe current work demonstrates an optical technique that utilizes micron-resolution particle image velocimetry (µ-PIV) for temperature measurement. The technique is based on the premise that Brownian motion will cause width-wise broadening of the cross-correlation peak. A correlation-based PIV algorithm detects the magnitude of Brownian particle motion and can be used to determine the temperature of the fluid. Results were obtained using fluorescing (rhodamine 542/612) spherical 700 nm diameter polystyrene-latex particles in water. Temperature changes up to 25 °C were determined with an experimental accuracy of ±3 °C.
06.30.Gv Velocity, acceleration, and rotation
47.80.-v Instrumentation and measurement methods in fluid dynamics
Issue 7 (July 2002)
Received 5 December 2001, accepted for publication 4 April 2002, in final form 7 March 2002
Published 20 June 2002
V Hohreiter et al 2002 Meas. Sci. Technol. 13 1072
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