Measurement Accuracy of a Mono-fiber Optical Probe in a Bubbly Flow

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F10%3A00343074" target="_blank" >RIV/67985858:_____/10:00343074 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Measurement Accuracy of a Mono-fiber Optical Probe in a Bubbly Flow
Original language description
The measurement accuracy of a mono-fiber optical probe is studied experimentally using isolated bubbles rising freely in a still liquid. The dwell time of the probe tip within the gas phase, which is obtained from both the optical probe signal and high-speed visualization, is compared with the dwell time expected for a non-perturbed bubble. The measurement error results mainly from the intrusive nature of the optical probe, which modifies the behavior of the bubble when it comes into contact with the probe tip. The measured dwell time therefore differs from its ideal value that would be found with an unperturbed bubble. For a wetting liquid, the interaction increases the dwell time if the bubble is pierced near its pole, and shortens it for piercing near the equator. It is shown that the error can be correlated with a modified Weber number, and this correlation is helpful for sensor selection and for uncertainty estimate.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CI - Industrial chemistry and chemical engineering
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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