Pipe-wall friction in vertical sand-slurry flows

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F09%3A00329161" target="_blank" >RIV/67985874:_____/09:00329161 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21110/09:00156169
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Pipe-wall friction in vertical sand-slurry flows
Original language description
The paper describes the results of extensive laboratory tests of vertical flows of three sand fractions (0.12-mm-, 0.37-mm-, and 1.84-mm sands) in a 150-mm pipe. The tests revealed an interesting phenomenon of a surprisingly low contribution of the medium sand to the total friction of the mixture flow in the vertical pipe. The frictional pressure drop in highly-concentrated flows at high velocities was lower for slurries of the medium sand than for slurries of both the fine sand and the coarse sand. Thesolids friction at the pipe wall is analyzed taking into account effects of particle-particle interactions and particle-liquid interactions in the boundary layer of a vertical flow of settling slurry. The analysis suggests that the observed phenomenon is associated with the hydrodynamic liquid-lift force acting on solid particles traveling near a pipe wall.
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
BK - Liquid mechanics
OECD FORD branch
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Project
<a href="/en/project/GA103%2F06%2F0428" target="_blank" >GA103/06/0428: Mechanisms of dispersion and friction in coarse-slurry flows</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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