A smoothing scheme for reducing field anisotropy inN-body simulation |
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| Authors: | W. Y. Chau S. S. Mak Y. W. Law K. L. Chan |
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| Affiliation: | (1) Department of Physics, University of Hong Kong, Hong Kong;(2) Department of Applied Physics, Hong Kong Polytechnic, Hong Kong;(3) Applied Research Corporation, Md., USA;(4) Yale University, New Haven, Conn., USA;(5) Present address: Queen's University at Kingston, Ontario, Canada |
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| Abstract: | A method is proposed to reduce the field anisotropy inN-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 neighbouring points to create compensating higher-order multipoles. Improvement 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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