Orr, W. M. The Stability or Instability of the Steady Motions of a Perfect Liquid and of a Viscous Liquid. Part I: A Perfect Liquid. Proceedings of the Royal Irish Academy. Section A: Mathematical and Physical Sciences 27, 9–68 (1907).
 Squires, K. D. & Eaton, J. K. 1991 Preferential concentration of particles by turbulence. Phys. Fluids A 3, 1169–1178.
 Wang, L. P. & Maxey, M. R. 1993 Settling velocity and concentration distribution of heavy particles in homogeneous isotropic turbulence. J. Fluid Mech. 256, 27–68.
We would like to thank Professor Donald L. Koch for his extraordinary support in this project.
This tutorial project is created under the NSF grant : NSF CBET-1233793.