Reigada R, Sagués F, Sancho J M
Departament de Química Física, Universitat de Barcelona, Avinguda Diagonal 647, Spain.
Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Aug;64(2 Pt 2):026307. doi: 10.1103/PhysRevE.64.026307. Epub 2001 Jul 23.
We study the problem of the advection of passive particles with inertia in a two-dimensional, synthetic, and stationary turbulent flow. The asymptotic analytical result and numerical simulations show the importance of inertial bias in collecting the particles preferentially in certain regions of the flow, depending on their density relative to that of the flow. We also study how these aggregates are affected when a simple chemical reaction mechanism is introduced through a Eulerian scheme. We find that inertia can be responsible for maintaining a stationary concentration pattern even under nonfavorable reactive conditions or destroying it under favorable ones.
我们研究了在二维、合成且稳定的湍流中具有惯性的被动粒子的平流问题。渐近分析结果和数值模拟表明，惯性偏差在根据粒子相对于流体的密度在流体的某些区域优先收集粒子方面具有重要性。我们还研究了通过欧拉格式引入简单化学反应机制时这些聚集体是如何受到影响的。我们发现，即使在不利的反应条件下，惯性也可能导致维持稳定的浓度模式，而在有利条件下则可能破坏这种模式。
