Author(s): S. G. Wallis; J. R. Manson
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Keywords: No Keywords
Abstract: The results of numerical experiments expose fundamental limitations to the accuracy of solute transport calculations in popular river modelling software such as MIKEl 1 and QUAL2E. Although unconditionally stable, the implicit Eulerian finite difference schemes used become excessively inaccurate when run with Courant numbers much greater than unity. In contrast, the authors' DISCUS scheme maintains high accuracy at all Courant numbers. It does this by virtue of its Lagrangian nature which recognises, and is in sympathy with, the physical nature of advection. The adoption of this sort of approach is recommended to all modellers.
Year: 1997