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Název:
Simulation of saltation motion using LBE based methods
Autoři: Dolanský, Jindřich
Typ dokumentu: Příspěvky z konference
Konference/Akce: Experimental Fluid Mechanics 2013, Kutná Hora (CZ), 2013-11-19 / 2013-11-22
Rok: 2014
Jazyk: eng
Abstrakt: The numerical model of the motion of the circular particle close to the bed in an open channel with a rugged bed based on the lattice Boltzmann method (LBM) is presented. The LBM is used as a DNS approach in which hydrodynamic forces are expressed as sum of contributions from fluid elements interacting with the moving particle. The corresponding numerical simulation for the saltation motion which represents a dominant mode of the bed load transport is developed. Flow is driven by the logarithmic velocity profile at the inlet of a two dimensional channel with a bed formed by semi-circles of variable radii in a bed of particles. Translational and rotational movements of the particle are induced by gravitational force on one hand, and by hydrodynamic forces on the other hand. The LBE (lattice Boltzmann equation) based simulation provides the opportunity to study the behavior of saltation motion in the moderate and high Reynolds number regimes. Most of the input parameters, including boundary conditions or flow conditions, are adjustable within a range of values. Stability issues of the simulation are considered and a resolution using a combination of different LBE models and the extension of computational resources is proposed. Finally, an enhancement of the simulation for more complex processes is suggested.
Klíčová slova: implementation of LBM model; lattice Boltzmann method (LBM); parallelization of LBM model; particle motion; particle-bed collisions; particle-particle collisions; saltation; stability of LBM model
Číslo projektu: GA103/09/1718 (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Proceedings of the International conference Experimental Fluid Mechanics 2013, ISBN 978-80-260-5375-0
Instituce: Ústav pro hydrodynamiku AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný na vyžádání prostřednictvím repozitáře Akademie věd.
Původní záznam: http://hdl.handle.net/11104/0226730
Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-166074
Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav pro hydrodynamiku
Konferenční materiály > Příspěvky z konference
Autoři: Dolanský, Jindřich
Typ dokumentu: Příspěvky z konference
Konference/Akce: Experimental Fluid Mechanics 2013, Kutná Hora (CZ), 2013-11-19 / 2013-11-22
Rok: 2014
Jazyk: eng
Abstrakt: The numerical model of the motion of the circular particle close to the bed in an open channel with a rugged bed based on the lattice Boltzmann method (LBM) is presented. The LBM is used as a DNS approach in which hydrodynamic forces are expressed as sum of contributions from fluid elements interacting with the moving particle. The corresponding numerical simulation for the saltation motion which represents a dominant mode of the bed load transport is developed. Flow is driven by the logarithmic velocity profile at the inlet of a two dimensional channel with a bed formed by semi-circles of variable radii in a bed of particles. Translational and rotational movements of the particle are induced by gravitational force on one hand, and by hydrodynamic forces on the other hand. The LBE (lattice Boltzmann equation) based simulation provides the opportunity to study the behavior of saltation motion in the moderate and high Reynolds number regimes. Most of the input parameters, including boundary conditions or flow conditions, are adjustable within a range of values. Stability issues of the simulation are considered and a resolution using a combination of different LBE models and the extension of computational resources is proposed. Finally, an enhancement of the simulation for more complex processes is suggested.
Klíčová slova: implementation of LBM model; lattice Boltzmann method (LBM); parallelization of LBM model; particle motion; particle-bed collisions; particle-particle collisions; saltation; stability of LBM model
Číslo projektu: GA103/09/1718 (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Proceedings of the International conference Experimental Fluid Mechanics 2013, ISBN 978-80-260-5375-0
Instituce: Ústav pro hydrodynamiku AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný na vyžádání prostřednictvím repozitáře Akademie věd.
Původní záznam: http://hdl.handle.net/11104/0226730
Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-166074
Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav pro hydrodynamiku
Konferenční materiály > Příspěvky z konference
Záznam vytvořen dne 2013-11-28, naposledy upraven 2021-11-24.