Název: Flow behaviour of sand-water mixture in horizontal and inclined pipes
Autoři: Vlasák, Pavel ; Chára, Zdeněk ; Matoušek, Václav ; Kesely, Mikoláš ; Krupička, Jan ; Konfršt, Jiří ; Mildner, Michael
Typ dokumentu: Příspěvky z konference
Konference/Akce: Experimental Fluid Mechanics 2019, Františkovy Lázně (CZ), 20191119
Rok: 2019
Jazyk: eng
Abstrakt: Pipelines transporting slurries in different industrial applications often contain inclined sections. The effect of pipe inclination, slurry concentration and mean velocity on the flow behaviour, deposition\nlimit velocity, and internal structure of a settling slurry was studied in an experimental pipe loop of inner diameter D = 100 mm. The slurry consisted from water and a narrow particle size distribution sand of mean diameter d50 = 0.55 mm. The experiments focused on the effects of the pipe inclination on solids distribution and deposition limit velocity. The concentration distribution in pipe cross-section was studied with application of a gamma-ray densitometer. The study revealed the stratified flow pattern of the medium sand-water mixture in inclined pipe sections. Experimental results show that the degree of the slurry stratification decreased with an increasing angle of inclination in the ascending pipe sections. The slurry stratification affected the deposition limit velocity. Mean in situ concentration for the descending flow was always lower than that for the ascending flow. The deposition limit in ascending pipe, in comparison with that in a horizontal pipe, slightly increased up to inclination angle about +25°, and then remained practically constant. For negative pipe inclination over – 30° no deposition limit was observed.
Klíčová slova: deposit limit velocity; inclined pipe; slurry flow
Číslo projektu: GA17-14271S (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Proceedings of the International conference Experimental Fluid Mechanics 2019

Instituce: Ústav pro hydrodynamiku AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0303294

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-408978


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav pro hydrodynamiku
Konferenční materiály > Příspěvky z konference