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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
April, 2-5, 2017, Las Vegas, NV, USA
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SPATIOTEMPORALLY RESOLVED HEAT TRANSFER IN FALLING-FILM FLOWS BY LASER-INDUCED FLUORESCENCE, PARTICLE TRACKING VELOCIMETRY AND INFRARED THERMOGRAPHY

Get access (open in a dialog) pages 3043-3046
DOI: 10.1615/TFEC2017.tpd.017771
Alexandros Charogiannis
Clean Energy Processes (CEP) Laboratory, Department of Chemical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
Fabian Denner
Department of Mechanical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
Berend G. M. van Wachem
Formerly at the Department of Mechanical Engineering, Imperial College London, SW7 2AZ, UK; Lehrstuhl für Technische Thermodynamik, Otto-von-Guericke-Universität Magdeburg, 39106 Germany
Serafim Kalliadasis
Department of Chemical Engineering, Imperial College London, London SW7 2AZ, U. K.; Chair of Mechanical Process Engineering, Otto-von-Guericke-Universität Magdeburg, 39106 Magdeburg, Germany
Christos N. Markides
Clean Energy Processes (CEP) Laboratory, Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom

摘要

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.