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Nonlinear filters for efficient shock computation
- Source :
- Mathematics of Computation. 52
- Publication Year :
- 1989
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1989.
-
Abstract
- A new type of methods for the numerical approximation of hyperbolic conservation laws with discontinuous solution is introduced. The methods are based on standard finite difference schemes. The difference solution is processed with a nonlinear conservation form filter at every time level to eliminate spurious oscillations near shocks. It is proved that the filter can control the total variation of the solution and also produce sharp discrete shocks. The method is simpler and faster than many other high resolution schemes for shock calculations. Numerical examples in one and two space dimensions are presented.
- Subjects :
- Numerical Analysis
Subjects
Details
- Language :
- English
- ISSN :
- 00255718
- Volume :
- 52
- Database :
- NASA Technical Reports
- Journal :
- Mathematics of Computation
- Notes :
- NSF DMS-85-03294, , NCA2-IR-360-403
- Publication Type :
- Report
- Accession number :
- edsnas.19890052494
- Document Type :
- Report