Fingerprints of random flows?

被引：27

作者：

Wilkinson, Michael ^{[1
]}

Bezuglyy, Vlad ^{[1
]}

Mehlig, Bernhard ^{[2
]}

机构：

[1] Open Univ, Dept Math & Stat, Milton Keynes MK7 6AA, Bucks, England

[2] Univ Gothenburg, Dept Phys, S-41296 Gothenburg, Sweden

来源：

PHYSICS OF FLUIDS | 2009年 / 21卷 / 04期

关键词：

external flows; flow simulation; random processes; NONSPHERICAL PARTICLES; ANISOTROPIC PARTICLES; REFLECTIVE FLAKES; FLUID-FLOWS; VISUALIZATION; MOTION; SUSPENSIONS; UNSTEADY; DYNAMICS; FIELD;

D O I：

10.1063/1.3118502

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

We consider the patterns formed by small rodlike objects advected by a random flow in two dimensions. An exact solution indicates that their direction field is nonsingular. However, we find from simulations that the direction field of the rods does appear to exhibit singularities. First, "scar lines" emerge where the rods abruptly change direction by pi. Later, these scar lines become so narrow that they "heal over" and disappear, but their ends remain as point singularities, which are of the same type as those seen in fingerprints. We give a theoretical explanation for these observations.

引用

页数：11

共 16 条

[1]

[Anonymous], CLASSIFICATION USES

[2] THE MOTION OF RIGID PARTICLES IN A SHEAR FLOW AT LOW REYNOLDS NUMBER [J].