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research article

Hybrid high-resolution RBF-ENO method

Hesthaven, Jan S.  
•
Mönkeberg, Fabian  
2021
Journal of Computational Physics: X

Essentially nonoscillatory (ENO) and weighted ENO (WENO) methods on equidistant Cartesian grids are widely used to solve partial differential equations with discontinuous solutions. The RBF-ENO method is highly flexible in terms of geometry, but its stencil selection algorithm is computational expensive. In this work, we combine the computationally efficient WENO method and the geometrically flexible RBF-ENO method in a hybrid high-resolution essentially nonoscillatory method to solve hyperbolic conservation laws. The scheme is based on overlapping patches with ghost cells, the RBF-ENO method for unstructured patches and a standard WENO method on structured patches. Furthermore, we introduce a positivity preserving limiter for non-polynomial reconstruction methods to stabilize the hybrid RBF-ENO method for problems with low density or pressure. We show its robustness and flexibility on benchmarks and complex test cases such as the scramjet inflow problem and a conical aerospike nozzle jet simulation.

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Type
research article
DOI
10.1016/j.jcpx.2021.100089
Author(s)
Hesthaven, Jan S.  
Mönkeberg, Fabian  
Date Issued

2021

Published in
Journal of Computational Physics: X
Volume

12

Article Number

100089

Subjects

finite volume method

•

hybrid grids

•

radial basis functions

•

ENO reconstruction

•

positivity preserving method

•

conical aerospike nozzle

Note

This is an Open Access article under the terms of the Creative Commons Attribution License

Editorial or Peer reviewed

NON-REVIEWED

Written at

EPFL

EPFL units
MCSS  
FunderGrant Number

Swiss federal funding

513966

Available on Infoscience
October 12, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/172417
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