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Published March 2001 | metadata_only
Journal Article

Digital particle image velocimetry/thermometry and application to the wake of a heated circular cylinder


Digital particle image velocimetry/thermometry (DPIV/T) is a technique whereby the velocity and temperature fields are obtained using thermochromic liquid crystal (TLC) seeding particles in water. In this paper, the uncertainty levels associated with temperature and velocity measurements using DPIV/T are studied. The study shows that large uncertainties are encountered when the temperature is measured from individual TLC particles. Therefore, an averaging procedure is presented which can reduce the temperature uncertainties. The uncertainty is reduced by computing the average temperature of the particles within the common specified sampling window used for standard DPIV. Using this procedure, the velocity and temperature distributions of an unsteady wake behind a heated circular cylinder are measured experimentally at Re=610. The instantaneous DPIV/T measurements are shown to be useful for computing statistical flow quantities, such as mean and velocity-temperature correlations.

Additional Information

© 2001 Springer-Verlag. Received 3 January 2000; Accepted 26 June 2000. We would like to thank the generous support of NSF under Grant CTS-9418973.

Additional details

August 19, 2023
August 19, 2023