title: Effects of forcing geometry on two-dimensional weak turbulence.
abstract: Using high-resolution particle tracking velocimetry, we study the effects of the forcing geometry on the statistics of an electromagnetically stirred thin-layer flow. We consider two forcing arrangements: one that produces a lattice of vortices as a base flow, and one that produces an array of shear bands. We find that the vortex flow drives stronger fluctuating kinetic energy while the shear-band flow leads to more intense fluctuating velocity gradients. We explain our results by considering the spectral flow of energy in the system. Our results have implications for the design of two-dimensional flow experiments.
authors.affiliation: Department of Mechanical Engineering & Materials Science, Yale University, New Haven, Connecticut 06520, USA.
authors.forename: Yang
authors.initials: Y
authors.lastname: Liao
authors.forename: Douglas H
authors.initials: DH
authors.lastname: Kelley
authors.forename: Nicholas T
authors.initials: NT
authors.lastname: Ouellette
mesh_terms: D003198:Computer Simulation; D004574:Electromagnetic Fields; D004735:Energy Transfer / Q000528:radiation effects; D008956:Models, Chemical; D017711:Nonlinear Dynamics; D012212:Rheology / Q000379:methods*; D012996:Solutions / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D012996:Solutions