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- W1997132078 abstract "The sliding phenomenon which is reported to impose a restriction upon the slope of slurry pipelines is investigated experimentally. Two different types of behavior which could be called “sliding” were observed. At pipe inclianations greater than 22° to the horizontal, fully settled layers of solid particles would slide with shear occurring at or near the pipe wall. The critical angle of inclination increased as the particle size decreased. When the slurry was not fully settled, a natural convective flow process was observed to move the slurry down a pipe incline. This flow occurred at much lower pipe inclinations. Concentration profiles measured near the bottom of a pipe incline showed little effect of slurry type or concentration, provided the slurry contained a significant amount of slowly settling solids. In this case, pipe slope was the most important variable. On a étudiè expérimentalement le phénomène de glissement qui, rapporte-t-on, nécessite des restrictions sur la pente des pipe-lines dans lesquels on transporte des matières solides en suspension. On a observé deux types différents de “glissements”. Lorsque les inclinaisons des canalisations excédaient un angle de 22° par rapport à l'horizontale, les couches bien établies des matières solides ont glissé et il s'est produit un cisaillement sur la paroi du pipe-line ou à proximité de celle-ci; l'angle critique d'inclinaison a augmenté lorsque la grosseur des particules a diminué. Lorsque la suspension n'était pas entièrement établie, on a observé qu'un courant naturel de convection a déplacé celle-civers le las de la pente de la canalisation; cet écoulement s'est produit lorsque les inclinaisons de celle-ci étaient bien moindres. Les profils de concentration qu'on a mesurés prés de la partie inférieure d'une pente de canalisation ont indiqué peu d'effet de concentration ou type de suspension, lorsque la suspension contenait une quantié appréciable de matiéres solides qui se déposaient lentement; dans ce cas, la pente de la canalisation a été la variable la plus importante." @default.
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- W1997132078 date "1974-06-01" @default.
- W1997132078 modified "2023-10-18" @default.
- W1997132078 title "Sliding in inclined slurry pipelines at shutdown" @default.
- W1997132078 cites W2017852777 @default.
- W1997132078 doi "https://doi.org/10.1002/cjce.5450520302" @default.
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