کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
519406 | 867662 | 2011 | 23 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Point-wise hierarchical reconstruction for discontinuous Galerkin and finite volume methods for solving conservation laws Point-wise hierarchical reconstruction for discontinuous Galerkin and finite volume methods for solving conservation laws](/preview/png/519406.png)
We develop a new hierarchical reconstruction (HR) method [17] and [28] for limiting solutions of the discontinuous Galerkin and finite volume methods up to fourth order of accuracy without local characteristic decomposition for solving hyperbolic nonlinear conservation laws on triangular meshes. The new HR utilizes a set of point values when evaluating polynomials and remainders on neighboring cells, extending the technique introduced in Hu, Li and Tang [9]. The point-wise HR simplifies the implementation of the previous HR method which requires integration over neighboring cells and makes HR easier to extend to arbitrary meshes. We prove that the new point-wise HR method keeps the order of accuracy of the approximation polynomials. Numerical computations for scalar and system of nonlinear hyperbolic equations are performed on two-dimensional triangular meshes. We demonstrate that the new hierarchical reconstruction generates essentially non-oscillatory solutions for schemes up to fourth order on triangular meshes.
Journal: Journal of Computational Physics - Volume 230, Issue 17, 20 July 2011, Pages 6843–6865