A generalized Active Flux method of arbitrarily high order in two dimensions
Fuente:
arXiv
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866917122907570176 |
|---|---|
| author | Barsukow, Wasilij Chandrashekar, Praveen Klingenberg, Christian Lechner, Lisa |
| author_facet | Barsukow, Wasilij Chandrashekar, Praveen Klingenberg, Christian Lechner, Lisa |
| contents | The Active Flux method can be seen as an extended finite volume method. The degrees of freedom of this method are cell averages, as in finite volume methods, and in addition shared point values at the cell interfaces, giving rise to a globally continuous reconstruction. Its classical version was introduced as a one-stage fully discrete, third-order method. Recently, a semi-discrete version of the Active Flux method was presented with various extensions to arbitrarily high order in one space dimension. In this paper we extend the semi-discrete Active Flux method on two-dimensional Cartesian grids to arbitrarily high order, by including moments as additional degrees of freedom (hybrid finite element--finite volume method). The stability of this method is studied for linear advection. For a fully discrete version, using an explicit Runge-Kutta method, a CFL restriction is derived. We end by presenting numerical examples for hyperbolic conservation laws. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_05101 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A generalized Active Flux method of arbitrarily high order in two dimensions Barsukow, Wasilij Chandrashekar, Praveen Klingenberg, Christian Lechner, Lisa Numerical Analysis 65M08, 65M12, 65M20, 35L65 The Active Flux method can be seen as an extended finite volume method. The degrees of freedom of this method are cell averages, as in finite volume methods, and in addition shared point values at the cell interfaces, giving rise to a globally continuous reconstruction. Its classical version was introduced as a one-stage fully discrete, third-order method. Recently, a semi-discrete version of the Active Flux method was presented with various extensions to arbitrarily high order in one space dimension. In this paper we extend the semi-discrete Active Flux method on two-dimensional Cartesian grids to arbitrarily high order, by including moments as additional degrees of freedom (hybrid finite element--finite volume method). The stability of this method is studied for linear advection. For a fully discrete version, using an explicit Runge-Kutta method, a CFL restriction is derived. We end by presenting numerical examples for hyperbolic conservation laws. |
| title | A generalized Active Flux method of arbitrarily high order in two dimensions |
| topic | Numerical Analysis 65M08, 65M12, 65M20, 35L65 |
| url | https://arxiv.org/abs/2502.05101 |