Imperial College London
Alternate

ProfessorChristosMarkides

Faculty of Engineering, Department of Chemical Engineering

Professor of Clean Energy Technologies
 
 
 
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Contact

 

+44 (0)20 7594 1601c.markides Website

 
 
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Location

 

404ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Charogiannis:2016,
author = {Charogiannis, A and Zadrazil, I and Markides, C},
pages = {116--116},
publisher = {International ASET Inc.},
title = {Development of a Thermographic Imaging Technique for Simultaneous Interfacial Temperature and Velocity Measurements},
url = {http://hdl.handle.net/10044/1/32383},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - An experimental technique, hereby referred to as ‘thermographic particle velocimetry’ (TPV) and capable of recovering twodimensional(2-D) surface temperature and velocity measurements at the interface of multiphase flows is presented. The proposedtechnique employs a single infrared (IR) imager and highly reflective, silver-coated particles, which when suspended near or at theinterface, can be distinguished from the surrounding fluid due to their different emissivity. The development of TPV builds upon ourprevious IR imaging studies of heated liquid-film flows; yet, the same measurement principle can be applied for the recovery of 2-Dtemperature- and velocity-field information at the interface of any flow with a significant density gradient between two fluid phases. Theimage processing steps used to recover the temperature and velocity distributions from raw IR frames are demonstrated by applicationof TPV in a heated and stirred flow in an open container, and include the decomposition of each raw frame into separate thermal andparticle frames, the application of perspective distortion corrections and spatial calibration, and the implementation of standard particleimage velocimetry algorithms. Validation experiments dedicated to the measurement of interfacial temperature and velocity were alsoconducted, with deviations between the results generated from TPV and those from accompanying conventional techniques not exceedingthe errors associated with the latter. Finally, the capabilities of the proposed technique are demonstrated by conducting temperature andvelocity measurements at the gas-liquid interface of a wavy film flow downstream of a localised heater.
AU  - Charogiannis,A
AU  - Zadrazil,I
AU  - Markides,C
EP  - 116
PB  - International ASET Inc.
PY  - 2016///
SP  - 116
TI  - Development of a Thermographic Imaging Technique for Simultaneous Interfacial Temperature and Velocity Measurements
UR  - http://hdl.handle.net/10044/1/32383
ER  -
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