Laboratory testing of granular kinetic theory for intense bed load transport

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F18%3A00323774" target="_blank" >RIV/68407700:21110/18:00323774 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.2478/johh-2018-0012" target="_blank" >http://dx.doi.org/10.2478/johh-2018-0012</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2478/johh-2018-0012" target="_blank" >10.2478/johh-2018-0012</a>

Result language

angličtina

Original language name

Laboratory testing of granular kinetic theory for intense bed load transport

Original language description

Collisional interactions in a sheared granular body are typical for intense bed load transport and they significantly affect behavior of flow carrying bed load grains. Collisional mechanisms are poorly understood and modelling approaches seldom accurately describe reality. One of the used approaches is the kinetic theory of granular flows. It offers constitutive relations for local shear-induced collision-based granular quantities – normal stress, shear stress and fluctuation energy – and relates them with local grain concentration and velocity. Depth distributions of the local granular quantities produced by these constitutive relations have not been sufficiently verified by experiment for the condition of intense bed load transport in open channels and ressurized pipes. In this paper, results from a tilting-flume facility including measured velocity distribution and deduced concentration distribution (approximated as linear profiles) are used to calculate distributions of the collision-based quantities by the constitutive relations and hence to test the ability of the kinetic-theory constitutive relations to predict conditions observed in these collision-dominated flows. This test indicates that the constitutive relations can be successfully applied to model the local collisional transport of solids at positions where the local concentration is not lower than approximately 0.18 and not higher than approximately 0.47.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20101 - Civil engineering

Project

<a href="/en/project/GA16-21421S" target="_blank" >GA16-21421S: Analysis of Granular-Liquid Channel Flows based on Kinetic Theory Approach</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

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

Name of the periodical

Journal of Hydrology and Hydromechanics

ISSN

0042-790X

e-ISSN

1338-4333

Volume of the periodical

66

Issue of the periodical within the volume

3

Country of publishing house

SK - SLOVAKIA

Number of pages

7

Pages from-to

330-336

UT code for WoS article

000441569500010

EID of the result in the Scopus database

2-s2.0-85049519598