Imperial College London

ProfessorChristosMarkides

Faculty of EngineeringDepartment 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

@article{Charogiannis:2016:10.1016/j.ijheatmasstransfer.2016.02.050,
author = {Charogiannis, A and Markides, C and Zadrazil, I},
doi = {10.1016/j.ijheatmasstransfer.2016.02.050},
journal = {International Journal of Heat and Mass Transfer},
pages = {589--595},
title = {Thermographic Particle Velocimetry (TPV) for Simultaneous Interfacial Temperature and Velocity Measurements},
url = {http://dx.doi.org/10.1016/j.ijheatmasstransfer.2016.02.050},
volume = {97},
year = {2016}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - We present an experimental technique, that we refer to as ‘thermographic particle velocimetry’ (TPV),which is capable of the simultaneous measurement of two-dimensional (2-D) surface temperature andvelocity at the interface of multiphase flows. The development of the technique has been motivated bythe need to study gravity-driven liquid-film flows over inclined heated substrates, however, the samemeasurement principle can be applied for the recovery of 2-D temperature- and velocity-field informationat the interface of any flow with a sufficient density gradient between two fluid phases. The proposedtechnique relies on a single infrared (IR) imager and is based on the employment of highly reflective(here, silver-coated) particles which, when suspended near or at the interface, can be distinguished fromthe surrounding fluid domain due to their different emissivity. Image processing steps used to recover thetemperature and velocity distributions include the decomposition of each original raw IR image into separatethermal and particle images, the application of perspective distortion corrections and spatial calibration,and finally the implementation of standard particle velocimetry algorithms. This procedure isdemonstrated by application of the technique to a heated and stirred flow in an open container. In addition,two validation experiments are presented, one dedicated to the measurement of interfacial temperatureand one to the measurement of interfacial velocity. The deviations between the results generatedfrom TPV and those from accompanying conventional techniques do not exceed the errors associatedwith the latter.
AU - Charogiannis,A
AU - Markides,C
AU - Zadrazil,I
DO - 10.1016/j.ijheatmasstransfer.2016.02.050
EP - 595
PY - 2016///
SN - 0017-9310
SP - 589
TI - Thermographic Particle Velocimetry (TPV) for Simultaneous Interfacial Temperature and Velocity Measurements
T2 - International Journal of Heat and Mass Transfer
UR - http://dx.doi.org/10.1016/j.ijheatmasstransfer.2016.02.050
UR - http://hdl.handle.net/10044/1/30391
VL - 97
ER -