Numerical simulation of plume-advection over a hill with coupled models. Part I: Numerical solution of the transport-equation |
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Authors: | G Ludes W Ulrich |
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Institution: | (1) Present address: Meteorologisches Institut der Universität München, Theresienstrasse 37, D-8000 München, Germany |
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Abstract: | Summary Four numerical methods suitable for the calculation of transport are compared on a linear two-dimensional advection equation. It is found that a mass-compensation algorithm which removes negative values has also a beneficial effect on the accuracy of schemes which are of higher order but are not positive. It is shown by numerical experiments, that the upstream spline advection scheme combined with a mass compensation is prefereable for some applications rather than other high accurate positive schemes like the flux-corrected transport scheme.With 3 Figures |
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