Wall Shear Stress Induced by a Large Bubble Rising in an Inclined Rectangular Channel

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F14%3A00431846" target="_blank" >RIV/67985858:_____/14:00431846 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.ijmultiphaseflow.2014.07.005" target="_blank" >http://dx.doi.org/10.1016/j.ijmultiphaseflow.2014.07.005</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijmultiphaseflow.2014.07.005" target="_blank" >10.1016/j.ijmultiphaseflow.2014.07.005</a>

Result language
angličtina
Original language name
Wall Shear Stress Induced by a Large Bubble Rising in an Inclined Rectangular Channel
Original language description
The rise of single air bubbles in inclined rectangular channels was experimentally investigated. Two-segment electrodiffusion probes were used to measure wall shear rate profiles along the passing bubbles. They provided information on reverse flow in a liquid film separating the bubble from the wall, capillary waves appearing at the bubble tail, and near-wall flow fluctuations in the bubble wake. The corresponding bubble shapes and rise velocities were obtained from simultaneous visual observations doneby a high-speed camera. The experiments were carried out for three channel depths (1.5, 4, and 8 mm), various channel inclinations (from 5° to 90°), bubble volumes (from 1 to 80 ml), and liquid up-flow velocities (from 0 to 0.2 m/s). In vertical channels, the wall shear rate trace of a bubble rise is primarily influenced by the channel depth. As the frontal shape of large bubbles does not change with the bubble size, also the wall shear rate measured under these bubbles evolves in the s
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
<a href="/en/project/GAP101%2F12%2F0585" target="_blank" >GAP101/12/0585: Application of the electrodiffusion sensors to the flow diagnostics in microfluidic systems</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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