Physical Review Fluids
Author(s): Ali Mozaffari, Nima Sharifi-Mood, Joel Koplik, and Charles Maldarelli
The stability of the boundary-guided motion of a diffusiophoretically self-propelled locomotor along a planar wall to mechanical disturbances and Brownian forces is examined theoretically. The main goal is to understand the conditions under which this passively guided motion is stable.
[Phys. Rev. Fluids 3, 014104] Published Mon Jan 29, 2018
Author(s): Pascal S. Raux and Anne-Laure Biance
The cohesion of a wet grain assembly is encountered in many situations, such as in the fabrication of sandcastles, the preparation of couscous, crumbles, or other granulated systems. Two simple experiments on model liquid/bead mixtures are performed to understand the behavior of such systems.
[Phys. Rev. Fluids 3, 014301] Published Mon Jan 29, 2018
Author(s): Matthew Rockwood, Yangzi Huang, and Melissa Green
Coherent vortex structures are tracked in simulations of massively-separated and turbulent flows using Lagrangian saddles found as intersections of positive and negative finite-time Lyapunov exponent ridges. This allows vortices to be tracked objectively in time and space in a variety of flows.
[Phys. Rev. Fluids 3, 014702] Published Mon Jan 29, 2018