Concentration distribution and deposition limit of medium-coarse sand-water slurry in inclined pipe

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F20%3A00517222" target="_blank" >RIV/67985874:_____/20:00517222 - isvavai.cz</a>

Výsledek na webu

<a href="http://hdl.handle.net/11104/0307261" target="_blank" >http://hdl.handle.net/11104/0307261</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2478/johh-2019-0023" target="_blank" >10.2478/johh-2019-0023</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Concentration distribution and deposition limit of medium-coarse sand-water slurry in inclined pipe

Popis výsledku v původním jazyce

Sand-water slurry was investigated on an experimental pipe loop of inner diameter D = 100 mm with the hori-zontal, inclined, and vertical smooth pipe sections. A narrow particle size distribution silica sand of mean diameter0.87 mm was used. The experimental investigation focused on the effects of pipe inclination, overall slurry concentration, and mean velocity on concentration distribution and deposition limit velocity. The measured concentration profiles showed different degrees of stratification for the positive and negative pipe inclinations. The degree of stratification depended on the pipe inclination and on overall slurry concentrationand velocity. The ascending flow was less stratified than the cor-responding descending flow, the difference increasing from horizontal flow up to an inclination angle of about +30°. The deposition limit velocity was sensitive to the pipe inclination,reaching higher values in the ascending than in the hori-zontal pipe. The maximum deposition limit value was reached for an inclination angle of about +25°, and the limit remained practically constant in value, about 1.25 times higher than that in the horizontal pipe. Conversely, in the de-scending pipe, the deposition limit decreased significantly with the negative slopes and tended to be zero for an inclina-tion angle of about −30°, where no stationary bed was observed.

Název v anglickém jazyce

Concentration distribution and deposition limit of medium-coarse sand-water slurry in inclined pipe

Popis výsledku anglicky

Sand-water slurry was investigated on an experimental pipe loop of inner diameter D = 100 mm with the hori-zontal, inclined, and vertical smooth pipe sections. A narrow particle size distribution silica sand of mean diameter0.87 mm was used. The experimental investigation focused on the effects of pipe inclination, overall slurry concentration, and mean velocity on concentration distribution and deposition limit velocity. The measured concentration profiles showed different degrees of stratification for the positive and negative pipe inclinations. The degree of stratification depended on the pipe inclination and on overall slurry concentrationand velocity. The ascending flow was less stratified than the cor-responding descending flow, the difference increasing from horizontal flow up to an inclination angle of about +30°. The deposition limit velocity was sensitive to the pipe inclination,reaching higher values in the ascending than in the hori-zontal pipe. The maximum deposition limit value was reached for an inclination angle of about +25°, and the limit remained practically constant in value, about 1.25 times higher than that in the horizontal pipe. Conversely, in the de-scending pipe, the deposition limit decreased significantly with the negative slopes and tended to be zero for an inclina-tion angle of about −30°, where no stationary bed was observed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/GA17-14271S" target="_blank" >GA17-14271S: Vliv sklonu potrubí na kritickou rychlost a rychlost skluzu heterogenní suspenze</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Hydrology and Hydromechanics

ISSN

0042-790X

e-ISSN

—

Svazek periodika

68

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

9

Strana od-do

83-91

Kód UT WoS článku

000514680600009

EID výsledku v databázi Scopus

2-s2.0-85082082868