Imperial College London
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Professor Omar K. Matar, FREng

Faculty of Engineering, Department of Chemical Engineering

Head of Department of Chemical Engineering
 
 
 
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Contact

 

+44 (0)20 7594 9618o.matar Website

 
 
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Assistant

 

Mr Avery Kitchens +44 (0)20 7594 6263

 
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Location

 

305 ACEACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Aguiar:2019,
author = {Aguiar, GM and Voulgaropoulos, V and Matar, OK and Markides, CN and Bucci, M},
publisher = {American Nuclear Society (ANS)},
title = {Experimental investigation of bubble nucleation, growth and departure using synchornized IR thermometry, two-colour LIF and PIV},
url = {http://hdl.handle.net/10044/1/72078},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - Boiling is a very effectiveheat removal process exploited in many applications, from electronic devicesto nuclear reactors. However, the physical mechanisms involved in this process are not fully understood yet, due toits complexity, whicharises from the many interacting sub-processes involved in the nucleation, growth, and detachment of isolated bubbles. Here, we present the methodology and initialresults from an experimental investigation aimed at elucidating and quantifying the mechanisms involved in a bubble life cycle (fromnucleation until departure). Towards this aim, we use synchronized high-speed infrared(IR)thermometry, ratiometric two-color laser-induced fluorescence (2cLIF) and particle image velocimetry (PIV). Infrared thermometry is used to measure the time-dependent temperature and heat flux distributions overthe boilingsurface, which are usefulto quantify the transfer of energy associated with the evaporation of the micro-layer. Two-color laser-induced fluorescence is used to measure the time-dependent temperature distribution in the liquid phase. Particle image velocimetry is employedto measure the velocity field around the bubble, necessary to elucidate the bubble growth and departure mechanisms. The investigation also revealsother fundamental heat transferaspects such as the dynamics of the near-wall superheated liquid layer, the mixing effect produced by bubble growth and departure, as well as convection effects around the bubble.
AU  - Aguiar,GM
AU  - Voulgaropoulos,V
AU  - Matar,OK
AU  - Markides,CN
AU  - Bucci,M
PB  - American Nuclear Society (ANS)
PY  - 2019///
TI  - Experimental investigation of bubble nucleation, growth and departure using synchornized IR thermometry, two-colour LIF and PIV
UR  - http://hdl.handle.net/10044/1/72078
ER  -
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