Maximum principle satisfying CWENO schemes for non-local conservation laws

TL;DR

This paper introduces a CWENO scheme for non-local conservation laws that maintains a maximum principle without restrictive CFL conditions or extra reconstructions, offering a more efficient high-order solution method.

Contribution

The paper presents a novel CWENO scheme that satisfies a maximum principle for non-local conservation laws, avoiding restrictive CFL conditions and additional reconstruction steps.

Findings

The CWENO scheme achieves high-order accuracy for non-local conservation laws.

It satisfies a maximum principle under suitable conditions.

The method is more efficient than DG and FV-WENO schemes.

Abstract

Central WENO schemes are a natural candidate for higher-order schemes for non-local conservation laws, since the underlying reconstructions do not only provide single point values of the solution but a complete (high-order) reconstruction in every time step, which is beneficial to evaluate the integral terms. Recently, in [C. Chalons et al., SIAM J. Sci. Comput., 40(1), A288-A305], Discontinuous Galerkin (DG) schemes and Finite Volume WENO (FV-WENO) schemes have been proposed to obtain high-order approximations for a certain class of non-local conservation laws. In contrast to their schemes, the presented CWENO approach neither requires a very restrictive CFL condition (as the DG methods) nor an additional reconstruction step (as the FV-WENO schemes). Further, by making use of the well-known linear scaling limiter of [X. Zhang and C.-W. Shu, J. Comput. Phys., 229, p. 3091-3120], our CWENO schemes satisfy a maximum principle for suitable non-local conservation laws.