## Abstract

The Upwind Source at Interface (U.S.I.) method for hyperbolic conservation laws with source term introduced by Perthame and Simeoni is essentially first order accurate. Under appropriate hypotheses of consistency on the finite volume discretization of the source term, we prove L^{p}-error estimates, 1≤p<+∞, in the case of a uniform spatial mesh, for which an optimal result can be obtained. We thus conclude that the same convergence rates hold as for the corresponding homogeneous problem. To improve the numerical accuracy, we develop two different approaches of dealing with the source term and we discuss the question of deriving second order error estimates. Numerical evidence shows that those techniques produce high resolution schemes compatible with the U.S.I. method.

Original language | English (US) |
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Pages (from-to) | 103-122 |

Number of pages | 20 |

Journal | MATHEMATICS OF COMPUTATION |

Volume | 74 |

Issue number | 249 |

DOIs | |

State | Published - Jan 2005 |

Externally published | Yes |

## Keywords

- Consistency
- Error estimates
- Finite volume schemes
- Scalar conservation laws
- Source terms
- Upwind interfacial methods

## ASJC Scopus subject areas

- Algebra and Number Theory
- Computational Mathematics
- Applied Mathematics