This study uses a global ocean eddy-permitting climate model to explore the export of abyssal water from the Southern Ocean and its sensitivity to projected twenty-first-century poleward-intensifying Southern Oceanwind stress. The abyssal flow pathways and transport are investigated using a combination of Lagrangian and Eulerian techniques. In an Eulerian format, the equatorand poleward flows w...

Potential flows u = ∇φ are solutions of the Navier–Stokes equations for viscous incompressible fluids for which the vorticity is identically zero. The viscous term μ∇u = μ∇∇φ vanishes, but the viscous contribution to the stress in an incompressible fluid (Stokes 1850) does not vanish in general. Here, we show how the viscosity of a viscous fluid in potential flow away from the boundary layers e...

Given image data of a fluid flow, the flow field, 〈u, v〉, governing the evolution of the system can be estimated using a variational approach to optical flow. Assuming that the flow field governing the advection is the symplectic gradient of a stream function or the gradient of a potential function – both falling under the category of a potential flow – it is natural to re-frame the optical flo...

in this paper, numerical investigation of a flat passive micromixer with heterogeneous surface properties that the flow through it, is driven by the electroosmotic flow have been presented. the governing equations, which consist of a laplace equation for the distribution of external electric potential, a poisson equation for the distribution of electric double layer potential, modified navier-s...

Recent progress in state-resolved kinetic models of thermal relaxation and dissociation of oxygen based on highfidelity transition rate coefficients is presented. Specifically, three types of collisions encountered in high-temperature flows are discussed: O2–O, O2–N, and O2–N2. For these molecular systems, the thermal relaxation times and dissociation rate coefficients, obtained from extensive ...

The interaction of polymers with turbulent shear flows is examined. We focus on the structure of the elastic stress tensor, which is proportional to the polymer conformation tensor. We examine this object in turbulent flows of increasing complexity. First is isotropic turbulence, then anisotropic (but homogenous) shear turbulence, and finally wall bounded turbulence. The main result of this pap...

One-way propagation of light, analogous to the directional flow of electrons in the presence of electric potential difference, has been an important goal in the wave-matter interaction. Breaking time-reversal symmetry in photonic flows is faced with challenges different from those for electron flows. In recent years several approaches and methods have been offered towards achieving this goal. H...

Behavior is organized into stable action modes with qualitative transitions between them. An ecological approach attempts to account for these patterns in terms of physical and informational constraints, such as attractors in the underlying dynamics of action and perceptual information specific to them. Perception and action are coupled by laws of control that relate informational variables to ...