The effect of longitudinal slope on solids transport and friction in particle-laden flow above stationary deposit in pipe

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F19%3A00517509" target="_blank" >RIV/67985874:_____/19:00517509 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The effect of longitudinal slope on solids transport and friction in particle-laden flow above stationary deposit in pipe

Popis výsledku v původním jazyce

The effect is studied of the longitudinal slope of the top of a stationary bed on bed transport and friction in flow carrying solid particles above the bed deposit in a pressurized pipe. The analysis is based on results of our experiments carried out in a 100 mm pipe loop with an inclinable invert Utube section. In the literature, various versions of formulae can be found for bed load transport. However, all of them are calibrated for very mild longitudinal slopes as they expect an application to conditions in open channels where the slope is small and its variation marginal. In our analysis, we employ our versions of the Meyer-Peter and Müller (MPM) transport formula and of the bed friction formula for the intense transport condition. The aim is to use our experimental results for inclined flows including those at very steep inclinations to examine the implementation of the effect of the longitudinal slope in the predictive formulae. Applications of the presented research results include sediment transport and morphology of mountain streams as well as hydraulic transport of solids in inclined pipes. A layered model for settling slurry flows in inclined pipes uses the transportand friction formulae to predict the energy head loss and internal structure of the slurry flow.

Název v anglickém jazyce

The effect of longitudinal slope on solids transport and friction in particle-laden flow above stationary deposit in pipe

Popis výsledku anglicky

The effect is studied of the longitudinal slope of the top of a stationary bed on bed transport and friction in flow carrying solid particles above the bed deposit in a pressurized pipe. The analysis is based on results of our experiments carried out in a 100 mm pipe loop with an inclinable invert Utube section. In the literature, various versions of formulae can be found for bed load transport. However, all of them are calibrated for very mild longitudinal slopes as they expect an application to conditions in open channels where the slope is small and its variation marginal. In our analysis, we employ our versions of the Meyer-Peter and Müller (MPM) transport formula and of the bed friction formula for the intense transport condition. The aim is to use our experimental results for inclined flows including those at very steep inclinations to examine the implementation of the effect of the longitudinal slope in the predictive formulae. Applications of the presented research results include sediment transport and morphology of mountain streams as well as hydraulic transport of solids in inclined pipes. A layered model for settling slurry flows in inclined pipes uses the transportand friction formulae to predict the energy head loss and internal structure of the slurry flow.

Druh

O - Ostatní výsledky

CEP obor

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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

2019

Kód důvěrnosti údajů

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