Results 31 to 40 of about 5,203,929 (306)

LABORATORY TESTS OF A FOUR-SECTION SEED WHEEL WITH GROOVES IN THE SHAPE OF A PART OF THE ROTATION SURFACE OF A TORUS [PDF]

open access: yesVolga Region Farmland, 2020
The article deals with the issue of improving the quality indicator of sowing cereal seeds, such as instability of total sowing and the results of laboratory research of experimental sowing machine, the reel of which is made four-sectional, with grooves ...
N.P. Laryushin   +3 more
doaj   +1 more source

Origin of the quasi-quantized Hall effect in ZrTe5

open access: yesNature Communications, 2021
A 3D quantum Hall effect has been reported in Dirac semimetal ZrTe5 due to a magnetic-field-driven Fermi surface instability. Here, the authors show evidence of quasi-quantized Hall response without Fermi surface instability, but they argue that it is ...
S. Galeski   +26 more
doaj   +1 more source

On Taylor Instability of Plane Surfaces [PDF]

open access: yesThe Physics of Fluids, 1959
A number of special results on combined Taylor and Helmholtz instability are readily derivable by imposing a constant velocity parallel to, and acceleration normal to, the interface such that the interfacial wave appears to be stationary.
openaire   +2 more sources

Viscoelastic surface instabilities [PDF]

open access: yesComptes Rendus. Physique, 2009
We review three different types of viscoelastic surface instabilities: The Rayleigh–Plateau, the Saffman–Taylor and the Faraday instabilities. These instabilities are classical examples of hydrodynamic surface instabilities. The addition of a small amount of polymer to pure water can alter its flow behavior drastically and the type of instability may ...
Lindner, A., Wagner, C.
openaire   +2 more sources

A New Mathematical Model for the Features of Bubble Collapse in Steam Cavitation Processes

open access: yesApplied Sciences
This study presents a novel mathematical model for bubble cavitation, demonstrating its application in the numerical simulation of steam bubble dynamics within hydrodynamic cavitation phenomena. While previous research has largely focused on the negative
Hanna Koshlak, Anatoliy Pavlenko
doaj   +1 more source

Charge stripes in the graphene-based materials

open access: yesScientific Reports, 2023
We present an analytical model of the charge density wave instability in graphene sheets within the intercalated graphite CaC6 compound. The instability yields the experimentally observed uniaxial charge stripes of periodically modulated electron density,
Petra Grozić   +3 more
doaj   +1 more source

Stability of oscillatory gravity wave trains with energy dissipation and Benjamin-Feir instability

open access: yes, 2012
The Benjamin-Feir instability describes the instability of a uniform oscillatory wave train in an irrotational flow subject to small perturbation of wave number, amplitude and frequency.
Chen, Zhi-Min, Wilson, P.A.
core   +1 more source

Ekman-Inertial Instability

open access: yes, 2020
We report on an instability, arising in sub-surface, laterally-sheared geostrophic flows. When the lateral shear of a horizontal flow in geostrophic balance is of opposite sign to the Coriolis parameter, and exceeds it in magnitude, embedded ...
Nicolas Grisouard, Varvara E. Zemskova
core   +1 more source

Tunable herringbone patterns in SiO2 thin films

open access: yesMechanical Engineering Journal
Ordered zigzag wrinkles, or herringbones, arising from surface instability in biaxially compressed thin films on soft substrates offer significant potential for diverse engineering applications. In this study, we experimentally investigated the formation
So NAGASHIMA   +4 more
doaj   +1 more source

Research of Transitional Failure Mode as Damage Evolution in Rock Wall

open access: yesAdvances in Civil Engineering, 2020
The stress condition of tunnel surrounding rock mass is complex. The stress concentration of in situ brittle rock mass caused by excavation results in localized damage evolution parallel to the free face, which is called surface instability.
Xiao-guang Li   +3 more
doaj   +1 more source

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