Some cautionary remarks about smoothed particle hydrodynamics

Details Some cautionary remarks about smoothed particle hydrodynamics Some cautionary remarks about smoothed particle hydrodynamics

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...404..717h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 404, no. 2, p. 717-722.

Statistics

Computation

73

Astronomical Models, Computational Fluid Dynamics, Hydrodynamics, Particle Motion, Smoothing, Compressible Fluids, Equations Of Motion, Particle Interactions

Scientific paper

Potential difficulties with smoothed particle hydrodynamics are discussed. In particular, empirical tests are used to demonstrate that the errors resulting from the use of variable smoothing can be much larger than commonly believed. Fortunately, however, these errors, which are normally small, do not appear to promote instability on small scales, such as fragmentation in self-gravitating fluids. Still, while SPH remains a useful tool for many problems of astrophysical interest, a rigorous formulation of it, which is adaptive but still satisfies conservation properties, is clearly wanting.

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