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A parallel algorithm for implicit depletant simulations
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DOI：10.1063/1.4935175.png)
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摘要
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We present an algorithm to simulate the many-body depletion interaction between anisotropic colloids in an implicit way, integrating out the degrees of freedom of the depletants, which we treat as an ideal gas. Because the depletant particles are statistically independent and the depletion interaction is short-ranged, depletants are randomly inserted in parallel into the excluded volume surrounding a single translated and/or rotated colloid. A configurational bias scheme is used to enhance the acceptance rate. The method is validated and benchmarked both on multi-core processors and graphics processing units for the case of hard spheres, hemispheres, and discoids. With depletants, we report novel cluster phases in which hemispheres first assemble into spheres, which then form ordered hcp/fcc lattices. The method is significantly faster than any method without cluster moves and that tracks depletants explicitly, for systems of colloid packing fraction phi(c) < 0.50, and additionally enables simulation of the fluid-solid transition. (C) 2015 AIP Publishing LLC.
Keyword:
MOLECULAR-DYNAMICS SIMULATIONS
MONTE-CARLO
SHAPE
CRYSTALLIZATION
BEHAVIOR
MIXTURE
NANOCRYSTALS
COLLOIDS
ENTROPY
MODEL
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期刊
IF:
3.1
论文数:
7.2W
被引数:
23.2W
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