Almost all properties of vector fields, including magnitude, direction, λ 2 and vorticity change
under arbitrary movements of the observer. This is undesirable since measurements of …

We use the recent frame-indifferent theory of diffusive momentum transport to identify
internal barriers in wall-bounded turbulence. Formed by the invariant manifolds of the …

Here we present an assessment of eddy activity in a 3,500× 2,000 km region of the North
Pacific. Eddies were identified and tracked within a numerical simulation that used the …

Although numerous studies on Eulerian mesoscale eddies with closed contours of sea
surface height (SSH) or streamline have been conducted in the Gulf of Mexico (GoM), a …

We present laser-induced full-matrix imaging of complex-shaped objects that combines the
advantages of noncontact laser ultrasound inspection and high-contrast array imaging …

Hyperbolic points and their unsteady generalization–hyperbolic trajectories–drive the
exponential stretching that is the hallmark of nonlinear and chaotic flow. In infinite-time …

A novel technique for detecting Lagrangian vortices is applied to a helical
magnetohydrodynamic dynamo simulation. The vortices are given by tubular level surfaces …

Vortices in the solar photosphere can be linked to a wide range of events, such as small-
scale solar eruptions, wave excitation, and heating of the upper part of the solar atmosphere …

The method of Lagrangian Descriptors has been applied in many different contexts,
specially in geophysical flows. In this paper, we analyze their performance in incompressible …

Early progress in non-Newtonian fluid mechanics was facilitated by the emergence of two
fundamental and complementary principles: objective constitutive characterizations and …