Caustics in turbulent aerosols
Caustics in turbulent aerosols
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DOI：
10.1209/epl/i2004-10532-7
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发表时间：
2004-02
期刊：
影响因子：
1.8
通讯作者：
Michael Wilkinson;Bernhard Mehlig
中科院分区：
文献类型：
--
作者：
Michael Wilkinson;Bernhard Mehlig
焦散网络可以出现在悬浮在随机移动的气体中的粒子分布中。即使在轨迹不合并的情况下，它们也可以通过使粒子靠近来促进粒子的凝聚。这些焦散模式的演化取决于悬浮粒子的李雅普诺夫指数λ1和λ2，以及粒子遇到焦散的速率J。我们发展了一种理论，在短相关时间的限制下，从气体流动的统计性质确定量J， λ1, λ2。
Networks of caustics can occur in the distribution of particles suspended in a randomly moving gas. These can facilitate coagulation of particles by bringing them into close proximity, even in cases where the trajectories do not coalesce. The evolution of these caustic patterns depends upon the Lyapunov exponents λ1, λ2 of the suspended particles, as well as the rate J at which particles encounter caustics. We develop a theory determining the quantities J, λ1, λ2 from the statistical properties of the gas flow, in the limit of short correlation times.