A Positive Definite Limiter for Advection Problems

James Kent

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    Abstract

    Advection schemes are important in many branches of computational fluid dynamics. They are used for tracer transport in atmospheric models, where the tracer mixing ratios must remain positive. Many advection schemes employ monotonic limiters, however these can reduce the accuracy of the schemes for smooth data. In this article a commonly used monotonic limiter is modified to make it positive definite (but not strictly monotonic). Testing in multiple dimensions shows that there is improved accuracy over the monotonic limiter, while no negative values are produced.
    Original languageEnglish
    Article number73
    Number of pages9
    JournalJournal of Scientific Computing
    Volume82
    Issue number3
    DOIs
    Publication statusPublished - 6 Mar 2020

    Keywords

    • Tracer
    • Transport
    • Monotonicity
    • Finite-Difference
    • 65M06
    • 65M08
    • 35Q86

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