A smoothing scheme for reducing field anisotropy in N-body simulation

Details A smoothing scheme for reducing field anisotropy in N-body simulation A smoothing scheme for reducing field anisotropy in N-body simulation

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss.188..159c&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 188, no. 1, Feb. 1992, p. 159-164.

Astronomy and Astrophysics

Astrophysics

Anisotropy, Data Smoothing, Finite Difference Theory, Many Body Problem, Poisson Equation, Self Consistent Fields, Boundary Conditions, Fourier Series, Gravitational Collapse, Truncation Errors

Scientific paper

A method is proposed to reduce the field anisotropy in N-body calculations arising from the discretization of Poisson's equation in a particle-mesh scheme. Specifically, the mass is split (in addition to that employed in the mass assignment algorithm) over neighboring points to create compensating higher-order multipoles. Improvements by factor 2 has been observed in the field calculations, and spurious geometric effects in the example of a 4000 particle free-fall collapse have been reduced.

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