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research article

Adaptive WENO methods based on radial basis functions reconstruction

Bigoni, Caterina  
•
Hesthaven, Jan S.  
2017
Journal of Scientific Computing

We explore the use of radial basis functions (RBF) in the weighted essentially non-oscillatory (WENO) reconstruction process used to solve hyperbolic conservation laws, resulting in a numerical method of arbitrarily high order to solve problems with discontinuous solutions. Thanks to the mesh-less property of the RBFs, the method is suitable for non uniform grids and mesh adaptation. We focus on multiquadric radial basis functions and propose a simple strategy to choose the inherent shape parameter to control the balance between theoretical achievable accuracy and the numerical stability. We also develop an original smoothness indicator independent of the chosen RBF for the WENO reconstruction step. Moreover, we introduce type I and type II RBF-WENO methods by computing specific linear weights. The RBF-WENO method is used to solve linear and nonlinear problems for both scalar conservation laws and systems of conservation laws, including Burgers equation, the Buckley-Leverett equation, and the Euler equations. Numerical results confirm the performance of the proposed method. We finally consider an effective conservative adaptive algorithm that captures moving shocks and rapidly varying solutions well. Numerical results on moving grids are presented for both Burgers equation and the more complex Euler equations.

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Type
research article
DOI
10.1007/s10915-017-0383-1
Web of Science ID

WOS:000408109600004

Author(s)
Bigoni, Caterina  
Hesthaven, Jan S.  
Date Issued

2017

Publisher

Springer Verlag

Published in
Journal of Scientific Computing
Volume

72

Issue

3

Start page

986

End page

1020

Subjects

High-order WENO method

•

Radial Basis Functions

•

Hyperbolic Conservation Laws

•

Adaptivity

•

Multiquadrics

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
MCSS  
Available on Infoscience
May 16, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/126133
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