摘要翻译:
在光滑的随机速度场中,模拟湍流的小尺度,分析了团簇对惯性粒子碰撞速率的影响。当粒子速度的弛豫时间与场的特征时间之比很小时,团簇的作用是使更高能的碰撞变得不太可能。这一结果与流场维数无关,只与苛性形成过程中碰撞的起源有关。
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英文标题:
《Clustering and collision of inertial particles in random velocity fields》
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作者:
Piero Olla
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最新提交年份:
2008
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分类信息:
一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
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一级分类:Physics 物理学
二级分类:Chaotic Dynamics 混沌动力学
分类描述:Dynamical systems, chaos, quantum chaos, topological dynamics, cycle expansions, turbulence, propagation
动力系统,混沌,量子混沌,拓扑动力学,循环展开,湍流,传播
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英文摘要:
The influence of clustering on the collision rate of inertial particles in a smooth random velocity field, mimicking the smaller scales of a turbulent flow, is analyzed. For small values of the the ratio between the relaxation time of the particle velocity and the characteristic time of the field, the effect of clusters is to make more energetic collisions less likely. The result is independent of the flow dimensionality and is due only to the origin of collisions in the process of caustic formation.
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PDF链接:
https://arxiv.org/pdf/801.3584


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