Basset force in numerical models of saltation
Result description
In numerical models of fluid flow with particles moving close to solid boundaries, the Basset force is usually calculated for the particle motion between particle-boundary collisions. The present study shows that the history force must also be taken intoaccount regarding particle collisions with boundaries or with other particles. For saltation ? the main mode of bed load transport ? it is shown using calculations that two parts of the history force due to both particle motion in the fluid and to particle-bed collisions are comparable and substantially compensate one another. The calculations and comparison of the Basset force with other forces acting on a sand particle saltating in water flow are carried out for the different values of the transportstage. The conditions under which the Basset force can be neglected in numerical models of saltation are studied.
Keywords
basset forcebed load transportnumerical modelparticle-bed collision
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Basset force in numerical models of saltation
Original language description
In numerical models of fluid flow with particles moving close to solid boundaries, the Basset force is usually calculated for the particle motion between particle-boundary collisions. The present study shows that the history force must also be taken intoaccount regarding particle collisions with boundaries or with other particles. For saltation ? the main mode of bed load transport ? it is shown using calculations that two parts of the history force due to both particle motion in the fluid and to particle-bed collisions are comparable and substantially compensate one another. The calculations and comparison of the Basset force with other forces acting on a sand particle saltating in water flow are carried out for the different values of the transportstage. The conditions under which the Basset force can be neglected in numerical models of saltation are studied.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BK - Liquid mechanics
OECD FORD branch
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Result continuities
Project
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Hydrology and Hydromechanics
ISSN
0042-790X
e-ISSN
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Volume of the periodical
60
Issue of the periodical within the volume
4
Country of publishing house
SK - SLOVAKIA
Number of pages
11
Pages from-to
277-287
UT code for WoS article
000312915300006
EID of the result in the Scopus database
—
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
BK - Liquid mechanics
Year of implementation
2012