Packing-limited growth of irregular objects.

Packing-limited growth of irregular objects.
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堆积限制不规则物体的生长。

DOI:
10.1103/physreve.67.016117
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发表时间:
2002
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
通讯作者:
J. Weitz
J. Weitz
中科院分区:
--
文献类型:
--
作者:
P. Dodds;J. Weitz

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我们研究了二维不规则物体受填充限制的增长。我们通过在时间和空间上随机播种对象来生成包装,并允许每个对象生长,直到它与另一个对象碰撞。我们考虑的对象允许我们研究各向异性和非单位纵横比的单独影响。通过与孔隙空间体积衰减的联系,我们测量了物体尺寸分布的幂律指数。我们进行了尺度分析,表明它提供了大小分布指数的上界。我们发现,虽然生长机制的细节是不相关的,指数是强烈的形状依赖。潜在的应用是在生态和生物环境中,无根生物在生长过程中争夺有限的空间。
We study growth limited by packing for irregular objects in two dimensions. We generate packings by seeding objects randomly in time and space and allowing each object to grow until it collides with another object. The objects we consider allow us to investigate the separate effects of anisotropy and nonunit aspect ratio. By means of a connection to the decay of pore-space volume, we measure power law exponents for the object size distribution. We carry out a scaling analysis, showing that it provides an upper bound for the size distribution exponent. We find that while the details of the growth mechanism are irrelevant, the exponent is strongly shape dependent. Potential applications lie in ecological and biological environments where sessile organisms compete for limited space as they grow.
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