The monotonic Quartic Spline Method (QSM) for conservative transport problems

Authors:
M. Zerroukat;A. Staniforth;N. Wood
Affiliations:
Met Office, FitzRoy Road, Exeter EX1 3PB, United Kingdom;Met Office, FitzRoy Road, Exeter EX1 3PB, United Kingdom;Met Office, FitzRoy Road, Exeter EX1 3PB, United Kingdom
Venue:
Journal of Computational Physics
Year:
2010

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Abstract

A quartic spline based remapping algorithm is developed and illustrative tests of it are presented herein. To ensure mass conservation, the scheme solves an integral form of the transport equation rather than the differential form. The integrals are computed from reconstructed quartic splines with mass conservation constraints. For higher dimensions, this remapping can be used within a standard directional splitting methodology or within the flow-dependent cascade splitting approach. A high-order grid and sub-grid based monotonic filter is also incorporated into the overall scheme. This filter is independent of the underlying spline representation adopted here, and is of more general application.