Three-dimensional numerical modeling of flows over a natural dune field

R. J. Hardy, D. R. Parsons, James Leonard Best, S. N. Lane, R. Kostaschuk, O. Orfeo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Our ability to numerically predict the interaction between complex topography and three dimensional flow at large scales (∼1 km) has yet to be fully developed. This is the result of our inability to design numerically stable meshes for complex topographies at these spatial resolutions. This paper deals with the numerical simulation of flow over a natural dune field located in the Rio Paraná, NE Argentina. The methodology is based upon the development and application of a new five term porosity algorithm that modifies the mass conservation equation within a regular Cartesian mesh. Bathymetric measurements were made in the field using a multibeam echo sounder which provided an unparalleled topographic dataset to test this new numerical modeling approach. Measurements of flow were made using an acoustic Doppler current profiler and are used as inlet boundary conditions and validation data. The results demonstrate simple flow acceleration due to topographic forcing over the dune stoss and expansion and deceleration over the dune lee.

Original languageEnglish (US)
Title of host publicationProceedings of the International Conference on Fluvial Hydraulics - River Flow 2006
Pages1077-1083
Number of pages7
StatePublished - Dec 1 2006
Externally publishedYes
EventInternational Conference on Fluvial Hydraulics - River Flow 2006 - Lisbon, Portugal
Duration: Sep 6 2006Sep 8 2006

Publication series

NameProceedings of the International Conference on Fluvial Hydraulics - River Flow 2006
Volume1

Other

OtherInternational Conference on Fluvial Hydraulics - River Flow 2006
CountryPortugal
CityLisbon
Period9/6/069/8/06

ASJC Scopus subject areas

  • Water Science and Technology

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  • Cite this

    Hardy, R. J., Parsons, D. R., Best, J. L., Lane, S. N., Kostaschuk, R., & Orfeo, O. (2006). Three-dimensional numerical modeling of flows over a natural dune field. In Proceedings of the International Conference on Fluvial Hydraulics - River Flow 2006 (pp. 1077-1083). (Proceedings of the International Conference on Fluvial Hydraulics - River Flow 2006; Vol. 1).