DSpace Repository

Turbulent shallow-water model for orographic subgrid-scale perturbations

Show simple item record

dc.creator Mangiavacchi Norberto
dc.creator Coutinho Alvaro L. G. A.
dc.creator Ebecken Nelson F. F.
dc.date 2000
dc.date.accessioned 2013-05-30T11:23:21Z
dc.date.available 2013-05-30T11:23:21Z
dc.date.issued 2013-05-30
dc.identifier http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-73862000000100007
dc.identifier http://www.doaj.org/doaj?func=openurl&genre=article&issn=01007386&date=2000&volume=22&issue=1&spage=83
dc.identifier.uri http://koha.mediu.edu.my:8181/jspui/handle/123456789/4561
dc.description A parallel pseudo-spectral method for the simulation in distributed memory computers of the shallow-water equations in primitive form was developed and used on the study of turbulent shallow-waters LES models for orographic subgrid-scale perturbations. The main characteristics of the code are: momentum equations integrated in time using an accurate pseudo-spectral technique; Eulerian treatment of advective terms; and parallelization of the code based on a domain decomposition technique. The parallel pseudo-spectral code is efficient on various architectures. It gives high performance onvector computers and good speedup on distributed memory systems. The code is being used for the study of the interaction mechanisms in shallow-water ows with regular as well as random orography with a prescribed spectrum of elevations. Simulations show the evolution of small scale vortical motions from the interaction of the large scale flow and the small-scale orographic perturbations. These interactions transfer energy from the large-scale motions to the small (usually unresolved) scales. The possibility of including the parametrization of this effects in turbulent LES subgrid-stress models for the shallow-water equations is addressed.
dc.publisher The Brazilian Society of Mechanical Sciences
dc.source Journal of the Brazilian Society of Mechanical Sciences
dc.subject Turbulent flows
dc.subject shallow-water equations
dc.subject subgrid-scale models
dc.subject orographic perturbations
dc.subject parallel processing
dc.subject spectral methods
dc.title Turbulent shallow-water model for orographic subgrid-scale perturbations

Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search DSpace

Advanced Search


My Account