ISSN Online: 2379-1748
ISBN Flash Drive: 978-1-56700-469-4
ISBN Online: 978-1-56700-470-0
Second Thermal and Fluids Engineering Conference
SPATIOTEMPORALLY RESOLVED HEAT TRANSFER IN FALLING-FILM FLOWS BY LASER-INDUCED FLUORESCENCE, PARTICLE TRACKING VELOCIMETRY AND INFRARED THERMOGRAPHY
Аннотация
We present an experimental technique, based on the simultaneous application of planar laser-induced fluorescence (PLIF), particle tracking velocimetry (PTV) and infrared thermography (IRT), aimed at the detailed measurement of unsteady heat-transfer in harmonically-excited film flows falling under the action of gravity over an inclined, electrically-heated substrate. PLIF is employed in order to recover space- and time-resolved film-height information, PTV to obtain two-dimensional (2-D) velocity, and IRT to measure the free-surface
(gas-liquid interface) temperature over a 2-D domain. Phase-lock averaged film-height, flow-field and freesurface data, we demonstrate the generation of highly localized film-height, velocity and heat-transfer along the wave topology over a range of applied heat fluxes.