Moving beds represented by immersed boundaries: numerical experiments using large eddy simulation

The Immerse Boundary Method (IBM) was used to evaluate the sediment transport over deformable beds. Large Eddy Simulation (LES) procedures were used for the mathematical treatment of turbulence, and the advection-diffusion equation was used to calculate sediment concentration. The Finite Differences...

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Autores principales:	Alamy Filho,José Eduardo, Edmar Schulz,Harry, Andrade Simões,André Luiz
Lenguaje:	English
Publicado:	Universidad de Tarapacá. 2012
Materias:	Computational fluid mechanics immerse boundary method large eddy simulation sediment transport deformable beds
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052012000300010
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spelling	oai:scielo:S0718-330520120003000102013-01-07Moving beds represented by immersed boundaries: numerical experiments using large eddy simulationAlamy Filho,José EduardoEdmar Schulz,HarryAndrade Simões,André Luiz Computational fluid mechanics immerse boundary method large eddy simulation sediment transport deformable beds The Immerse Boundary Method (IBM) was used to evaluate the sediment transport over deformable beds. Large Eddy Simulation (LES) procedures were used for the mathematical treatment of turbulence, and the advection-diffusion equation was used to calculate sediment concentration. The Finite Differences Method with staggered grid was applied for the numerical solution of the governing equations (filtered Navier-Stokes, Continuity and advection-diffusion equations). Spatial derivatives were discretized using second order centered differences. A second order explicit Adams-Bashforth scheme was used for the time evolution in the advection-diffusion equation, while a fourth order Adams-Bashforth scheme was used for the filtered Navier-Stokes equations. The numerical simulation reproduced flow structures like large eddies after the dune crests and counter-rotative vortices, which are important in sediment transport. Resuspension fluxes and sedimentation (dependent on particle concentration) were calculated using equations proposed in this study. The deformations of the bed caused by erosion and deposition may be well followed through the present procedures, showing that this methodology is adequate to evaluate bed modifications and sediment transport in alluvial flows.info:eu-repo/semantics/openAccessUniversidad de Tarapacá.Ingeniare. Revista chilena de ingeniería v.20 n.3 20122012-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052012000300010en10.4067/S0718-33052012000300010
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Computational fluid mechanics immerse boundary method large eddy simulation sediment transport deformable beds
spellingShingle	Computational fluid mechanics immerse boundary method large eddy simulation sediment transport deformable beds Alamy Filho,José Eduardo Edmar Schulz,Harry Andrade Simões,André Luiz Moving beds represented by immersed boundaries: numerical experiments using large eddy simulation
description	The Immerse Boundary Method (IBM) was used to evaluate the sediment transport over deformable beds. Large Eddy Simulation (LES) procedures were used for the mathematical treatment of turbulence, and the advection-diffusion equation was used to calculate sediment concentration. The Finite Differences Method with staggered grid was applied for the numerical solution of the governing equations (filtered Navier-Stokes, Continuity and advection-diffusion equations). Spatial derivatives were discretized using second order centered differences. A second order explicit Adams-Bashforth scheme was used for the time evolution in the advection-diffusion equation, while a fourth order Adams-Bashforth scheme was used for the filtered Navier-Stokes equations. The numerical simulation reproduced flow structures like large eddies after the dune crests and counter-rotative vortices, which are important in sediment transport. Resuspension fluxes and sedimentation (dependent on particle concentration) were calculated using equations proposed in this study. The deformations of the bed caused by erosion and deposition may be well followed through the present procedures, showing that this methodology is adequate to evaluate bed modifications and sediment transport in alluvial flows.
author	Alamy Filho,José Eduardo Edmar Schulz,Harry Andrade Simões,André Luiz
author_facet	Alamy Filho,José Eduardo Edmar Schulz,Harry Andrade Simões,André Luiz
author_sort	Alamy Filho,José Eduardo
title	Moving beds represented by immersed boundaries: numerical experiments using large eddy simulation
title_short	Moving beds represented by immersed boundaries: numerical experiments using large eddy simulation
title_full	Moving beds represented by immersed boundaries: numerical experiments using large eddy simulation
title_fullStr	Moving beds represented by immersed boundaries: numerical experiments using large eddy simulation
title_full_unstemmed	Moving beds represented by immersed boundaries: numerical experiments using large eddy simulation
title_sort	moving beds represented by immersed boundaries: numerical experiments using large eddy simulation
publisher	Universidad de Tarapacá.
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052012000300010
work_keys_str_mv	AT alamyfilhojoseeduardo movingbedsrepresentedbyimmersedboundariesnumericalexperimentsusinglargeeddysimulation AT edmarschulzharry movingbedsrepresentedbyimmersedboundariesnumericalexperimentsusinglargeeddysimulation AT andradesimoesandreluiz movingbedsrepresentedbyimmersedboundariesnumericalexperimentsusinglargeeddysimulation
_version_	1714203401309388800

Moving beds represented by immersed boundaries: numerical experiments using large eddy simulation

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