Mesoscopic theory of granular fluids

Mesoscopic theory of granular fluids
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颗粒流体的介观理论

DOI:
10.1103/physrevlett.79.411
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发表时间:
1997
影响因子:
8.6
通讯作者:
J. Orza
J. Orza
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
T. Noije;M. Brito;J. Orza

文献摘要

被引文献

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利用涨落流体力学,我们描述了在自由演化的非弹性硬球流体中长程空间关联的缓慢建立。在不可压缩极限下,空间速度关联的行为(包括r^(-d)行为)只受涡度涨落的控制,并且与每个粒子多达50到100次碰撞的二维模拟很好地吻合。不可压缩性假设在超出弹性极限的距离后就失效了。
Using fluctuating hydrodynamics we describe the slow buildup of long range spatial correlations in a freely evolving fluid of inelastic hard spheres. In the incompressible limit, the behavior of spatial velocity correlations (including r^(-d) behavior) is governed by vorticity fluctuations only and agrees well with two-dimensional simulations up to 50 to 100 collisions per particle. The incompressibility assumption breaks down beyond a distance that diverges in the elastic limit.