High-resolution scheme
High-resolution schemes are used in the numerical solution of
- Second- or higher-order spatial accuracy is obtained in smooth parts of the solution.
- Solutions are free from spurious oscillations or wiggles.
- High accuracy is obtained around shocks and discontinuities.
- The number of mesh points containing the wave is small compared with a first-order scheme with similar accuracy.
General methods are often not adequate for accurate resolution of steep gradient phenomena; they usually introduce non-physical effects such as smearing of the solution or spurious oscillations. Since publication of Godunov's order barrier theorem, which proved that linear methods cannot provide non-oscillatory solutions higher than first order (
MUSCL methods are generally second-order accurate in smooth regions (although they can be formulated for higher orders) and provide good resolution, monotonic solutions around discontinuities. They are straightforward to implement and are computationally efficient.
For problems comprising both shocks and complex smooth solution structure, WENO schemes can provide higher accuracy than second-order schemes along with good resolution around discontinuities. Most applications tend to use a fifth order accurate WENO scheme, whilst higher order schemes can be used where the problem demands improved accuracy in smooth regions.
The method of holistic discretisation systematically analyses subgrid scale dynamics to algebraically construct closures for numerical discretisations that are both accurate to any specified order of error in smooth regions, and automatically adapt to cater for rapid grid variations through the algebraic learning of subgrid structures (Roberts 2003). A web service analyses any PDE in a class that may be submitted.
See also
- Godunov's theorem
- Sergei K. Godunov
- Total variation diminishing
- Shock capturing method
References
- Godunov, Sergei K. (1954). Ph.D. Dissertation: Different Methods for Shock Waves (Thesis). Moscow State University.
- Godunov, Sergei K. (1959). "A Difference Scheme for Numerical Solution of Discontinuous Solution of Hydrodynamic Equations". Mat. Sbornik. 47: 271–306. translated US Joint Publ. Res. Service, JPRS 7226, 1969.
- Harten, A. (1983). "High Resolution Schemes for Hyperbolic Conservation Laws". J. Comput. Phys. 49 (3): 357–393. hdl:2060/19830002586.
- Hirsch, Charles (1991). Computational Methods for Inviscid and Viscous Flows. Numerical Computation of Internal and External Flows. Vol. 2. Wiley. ISBN 978-0-471-92452-4.
- Laney, Culbert B. (1998). Computational Gasdynamics. Cambridge University Press. ISBN 978-1-107-39360-8.
- Roberts, A.J. (2003). "A holistic finite difference approach models linear dynamics consistently". Mathematics of Computation. 72 (241): 247–262. S2CID 11525980.
- Shu, C-W. (1998). "Essentially Non-oscillatory and Weighted Essential Non-oscillatory Schemes for Hyperbolic Conservation Laws. In: Cockburn". In ISBN 978-3-540-49804-9.
- Shu, C-W. (2009). "High Order Weighted Essentially Non-oscillatory Schemes for Convection Dominated Problems". SIAM Review. 51 (1): 82–126. .
- Anderson, Dale; Tannehill, John C.; Pletcher, Richard H. (2016). Computational Fluid Mechanics and Heat Transfer (3rd ed.). Taylor & Francis. ISBN 978-1-4665-7830-2.
- Toro, Eleuterio F. (1999). Riemann Solvers and Numerical Methods for Fluid Dynamics: A Practical Introduction (2nd ed.). Springer. ISBN 978-3-662-03915-1.
- van Leer, B. (1979). "Towards the ultimate conservative difference scheme V. A second order sequel to Godunov's method". J. Comput. Phys. 32 (1): 101–136. .