Front-fixing modeling of turbidity currents

S. Kostic, Gary Parker

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

Abstract

A mathematical model is developed for an unsteady, one-dimensional, single-layer, depth-averaged turbidity current driven by sediment of uniform size and temperature difference in a stratified ambient fluid. As both inflow and outflow current boundaries move in time, they are fixed by a suitable transformation of coordinate system. A deforming grid method overcomes the problem of a numerically 'dry' bed associated with the standard fixed-grid approach. The explicit Ultimate Quickest method of the third order in both time and space has been selected as particularly appropriate for solving hyperbolic governing equations that admit shocks and discontinuities. The original method is significantly improved in terms of computational efficiency by the introduction of time stretching that follows grid stretching in the longitudinal direction, thus maintaining the initial Courant number. The model is also capable of tracking the evolution of the bed in response to erosion and deposition of sediment.

Original languageEnglish (US)
Title of host publicationComputational methods in water resources - Volume 2 - Computational methods,surface water systems and hydrology
EditorsL.R. Bentley, J.F. Sykes, C.A. Brebbia, W.G. Gray, G.F. Pinder, L.R. Bentley, J.F. Sykes, C.A. Brebbia, W.G. Gray, G.F. Pinder
PublisherA.A.Balkema
Pages1075-1082
Number of pages8
ISBN (Print)9058091252
StatePublished - 2000
Externally publishedYes
EventComputational Methods in Water Resources - Calgary, Canada
Duration: Jun 25 2000Jun 29 2000

Other

OtherComputational Methods in Water Resources
CountryCanada
CityCalgary
Period6/25/006/29/00

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Engineering(all)
  • Environmental Science(all)

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