An a posteriori, efficient, high-spectral resolution hybrid finite-difference method for compressible flows
A high-order hybrid method consisting of a high-accurate explicit finite-difference scheme and a Weighted Essentially Non-Oscillatory (WENO) scheme is proposed in this article. Following this premise, two variants are outlined: a hybrid made up of a Finite Difference scheme and a compact WENO scheme...
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| Veröffentlicht in: | Computer methods in applied mechanics and engineering 2018-06, Vol.335, p.91-127 |
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| container_title | Computer methods in applied mechanics and engineering |
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| creator | Fernández-Fidalgo, Javier Nogueira, Xesús Ramírez, Luis Colominas, Ignasi |
| description | A high-order hybrid method consisting of a high-accurate explicit finite-difference scheme and a Weighted Essentially Non-Oscillatory (WENO) scheme is proposed in this article. Following this premise, two variants are outlined: a hybrid made up of a Finite Difference scheme and a compact WENO scheme (CRWENO 5), and a hybrid made up of a Finite Difference scheme and a non-compact WENO scheme (WENO 5). The main difference with respect to similar schemes is its a posteriori nature, based on the Multidimensional Optimal Order Detection (MOOD) method. To deal with complex geometries, a multi-block approach using Moving Least Squares (MLS) procedure for communication between meshes is used. The hybrid schemes are validated with several 1D and 2D test cases to illustrate their accuracy and shock-capturing properties. |
| doi_str_mv | 10.1016/j.cma.2018.02.013 |
| format | Article |
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| ispartof | Computer methods in applied mechanics and engineering, 2018-06, Vol.335, p.91-127 |
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| language | eng |
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| source | Access via ScienceDirect (Elsevier) |
| subjects | Compressibility Compressible flows Computational mathematics Finite difference method Finite differences Finite element analysis High-order schemes Mathematical analysis Numerical analysis Oscillators Overset grids Partial differential equations Spectral resolution |
| title | An a posteriori, efficient, high-spectral resolution hybrid finite-difference method for compressible flows |
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