Results 61 to 70 of about 9,353 (305)

Internal gravity waves and mixing

Eos, Transactions American Geophysical Union, 1992
Oceanic internal gravity waves span a range between mesoscale eddies and smallscale turbulence, providing an important link in the overall energy cascade from the large scales of generation to the small scales of dissipation. Progress in the understanding of internal‐wave dynamics was discussed at the sixth ‘Aha Huliko'a Hawaiian Winter Workshop, held ...
Peter Müller, Eric D'Asaro, Greg Holloway   +2 more
openaire   +1 more source

Hard‐Magnetic Soft Millirobots in Underactuated Systems

Advanced Robotics Research, EarlyView.
This review provides a comprehensive overview of hard‐magnetic soft millirobots in underactuated systems. It examines key advances in structural design, physics‐informed modeling, and control strategies, while highlighting the interplay among these domains.
Qiong Wang, Zixuan Zhang, Bingyan Li, Junkai Wang, Hongcheng Gu   +4 more
wiley   +1 more source

Nonlocomotory Robotic Strategies for Dynamic Rotation Control in Terrestrial Robots: A Review

Advanced Robotics Research, EarlyView.
Terrestrial robots increasingly require rapid body rotation to maintain stability and agility in complex environments. This review shows nonlocomotory rotational control strategies that operate without ground contact, including reaction wheels, tails, bars, limbs, and thrusters.
Y. Liang, J. An, X. Zheng, D. Wang, S. Wang, X. Wang, P. Zhu, J. Pei, S. Li, J. Paripurana, Y. Han, Z. Tang, X. Gan, Q. He, X. Ma   +14 more
wiley   +1 more source

Properties of internal planetary-scale inertio gravity waves in the mesosphere [PDF]

Annales Geophysicae, 2004
At high latitudes in the upper mesosphere, horizontal wind oscillations have been observed with periods around 10h. Waves with such a period are generated in our Numerical Spectral Model (NSM), and they are identified as planetary-scale inertio ...
H. G. Mayr, J. G. Mengel, E. R. Talaat, H. S. Porter, K. L. Chan   +4 more
doaj   +1 more source

Multidirectional Motion Strategy of Miniature Water Surface Robot Actuated by Single Exciter

Advanced Robotics Research, EarlyView.
A novel multidirectional motion strategy on the water surface based on a single exciter is proposed, and a single‐exciter single‐plate module is developed for actuation. The driving forces generation mechanism of the module is revealed from the perspective of the asymmetric surface wave field.
Haoxuan He, Dehong Wang, Jing Li, Shijing Zhang, Yingxiang Liu   +4 more
wiley   +1 more source

Chemical Mixing Induced by Internal Gravity Waves in Intermediate-mass Stars

The Astrophysical Journal, 2023
Internal gravity waves can cause mixing in the radiative interiors of stars. We study this mixing by introducing tracer particles into 2D hydrodynamic simulations.
A. Varghese, R. P. Ratnasingam, R. Vanon, P. V. F. Edelmann, T. M. Rogers   +4 more
doaj   +1 more source

Turbulent Spectrum of 2D Internal Gravity Waves

Physical Review Letters
We find the turbulent energy spectrum of weakly interacting 2D internal gravity waves using the full, non-hydrostatic dispersion relation. This spectrum is an exact solution of a regularized kinetic equation, from which the zero-frequency shear modes have been excised by a careful limiting process. This is a new method in wave kinetic theory.
Michal Shavit, Oliver Bühler, Jalal Shatah   +2 more
openaire   +3 more sources

High-Reynolds shallow flow over an inclined sinusoidal bottom [PDF]

, 2010
An experimental study of a turbulent free-surface shallow flow over an inclined sinusoidal bottom with a fixed corrugation amplitude is presented. A parametric analysis is performed by varying both the inclination angle and the Reynolds number.
Astruc, Dominique, Thual, Olivier, Plumerault, Louis-Romain   +2 more
core   +1 more source

Echinoderm‐Inspired Autonomy for Soft‐Legged Robots

Advanced Robotics Research, EarlyView.
Inspired by echinoderms, a modular soft robot achieves autonomous phototaxis without a central controller or explicit communication. Each limb independently adapts its actuation timing through local sensing and short‐term memory. Coordination emerges purely from physical interactions, demonstrating resilience to changes in morphology, environment, and ...
Harmannus A. H. Schomaker, Jelle de Vries, Johannes T. B. overvelde   +2 more
wiley   +1 more source

Analytical and numerical investigation of nonlinear internal gravity waves [PDF]

Nonlinear Processes in Geophysics, 2001
The propagation of long, weakly nonlinear internal waves in a stratified gas is studied. Hydrodynamic equations for an ideal fluid with the perfect gas law describe the atmospheric gas behaviour. If we neglect the term Ͽ dw/dt (product of the density
S. P. Kshevetskii
doaj