A modified direct DG flux gives provably positive cell averages at arbitrary polynomial order for Poisson-Nernst-Planck systems, with a limiter for pointwise positivity.
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A positivity-preserving hybrid DDG method for Poisson--Nernst--Planck systems
A modified direct DG flux gives provably positive cell averages at arbitrary polynomial order for Poisson-Nernst-Planck systems, with a limiter for pointwise positivity.