Multi-particle statistics—lines, shapes, and volumes in high Reynolds number turbulence

摘要：

We present experimental measurements of multi-particle Lagrangian statistics in high Reynolds number turbulence. We find that initial separations play an important role in the evolution of particle separation and the area or volume enclosed by multiple fluid particles. A time scale associated with the initial separation appears to be a natural time scale for characterizing the evolution. The existence of any universal scaling law for the evolution of particle clusters is possible only if this time scale is much smaller than the turbulence integral scale, the largest time scale of a turbulent flow, requiring very intense flows with large Reynolds numbers.

作者: Hai-tao Xu Nicholas T. Ouellette Eberhard Bodenschatz

作者单位: Max Planck Institute for Dynamics and Self-Organization, G(o)ttingen 37077, Germany;Laboratory of At Max Planck Institute for Dynamics and Self-Organization, G(o)ttingen 37077, Germany;Laboratory of At

会议类型: 国际会议

会议名称: The 5th International Conference on Nonlinear Mechanics(第五届国际非线性力学会议)

会议地点: 上海

会议语种:英文

页码: 1155-1161

在线出版日期: 2007-06-11（万方平台首次上网日期，不代表论文的发表时间）