Threshold criteria for components of predictive model for pipe flow of broadly-graded slurry

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F18%3A00325965" target="_blank" >RIV/68407700:21110/18:00325965 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1115/FEDSM2018-83455" target="_blank" >http://dx.doi.org/10.1115/FEDSM2018-83455</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1115/FEDSM2018-83455" target="_blank" >10.1115/FEDSM2018-83455</a>

Result language

angličtina

Original language name

Threshold criteria for components of predictive model for pipe flow of broadly-graded slurry

Original language description

Industrial slurries transported in pressurized pipelines often consist of particles of broad size distribution. The broad particle size distribution affects slurry flow behavior in a pipe. A four-component model (4CM) predicts the frictional pressure drop in pipe flow of broadly graded slurry. The model considers Newtonian carrying liquid and splits the broadly graded solids into fractions (components) each of which contributes to the pressure drop through its own dominating friction mechanism expressed by a particular sub-model in the 4CM. The sorting of the solids into the components (carrier, pseudo-homogeneous, heterogeneous, fully-stratified) must be based on appropriate criteria. For the sake of simplicity, the 4CM currently uses threshold sizes of particles to split the solids into 4 components. The goal of the present work is to analyze the existing criteria for the threshold between the pseudo-homogeneous component and heterogeneous component and for the threshold between the heterogeneous component and fully-stratified component. The analysis is based on a description of mechanisms governing particle support (suspension, deposition) of each particular solids component in slurry flow. It shows that the existing grain-size thresholds actually express certain proportions among threshold velocities of flow delimiting different slurry flow regimes. Such threshold velocities are the deposition-limit velocity, the initial-suspension velocity, and the full-suspension velocity. We discuss the proportions and demonstrate how properties (of liquid, solids, flow) and associated parameters additional to the grain size may influence the thresholds. The analytical results are supported by experimental results for flow of individual components in a laboratory loop.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20101 - Civil engineering

Project

—

Continuities

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Publication year

2018

Confidentiality

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

Article name in the collection

Proc. ASME 2018 5th Joint US-European Fluids Engineering Summer Conference FEDSM2018

ISBN

9780791851579

ISSN

—

e-ISSN

—

Number of pages

7

Pages from-to

—

Publisher name

American Society of Mechanical Engineers - ASME

Place of publication

New York

Event location

Montreal

Event date

Jul 15, 2018

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000457516300059