Results 221 to 230 of about 13,334 (263)
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Physical Review E, 2018
Organisms can be synchronized not only to the natural 24-h light-dark cycle but also to artificial non-24-h cycles. Interestingly, when the period of the cycle is far from 24 h, organisms may show complicated behavioral patterns. For example, exposed to a 22-h light-dark cycle, in behavioral activity of rats, a phenomenon called "dissociation" emerges,
Gu, C.G. +3 more
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Organisms can be synchronized not only to the natural 24-h light-dark cycle but also to artificial non-24-h cycles. Interestingly, when the period of the cycle is far from 24 h, organisms may show complicated behavioral patterns. For example, exposed to a 22-h light-dark cycle, in behavioral activity of rats, a phenomenon called "dissociation" emerges,
Gu, C.G. +3 more
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The Influence of Entrainment on Distribution Ratios in Complexation Studies
Solvent Extraction and Ion Exchange, 2019ABSTRACTEntrainment of a small amount of one phase in the other after phase separation is almost impossible to avoid in solvent extraction.
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Density Ratio and Entrainment Effects on Asymptotic Rayleigh–Taylor Instability
Journal of Fluids Engineering, 2017A comprehensive numerical study was performed in order to examine the effect of density ratio on the mixing process inside the mixing zone formed by Rayleigh–Taylor instability (RTI). This effect exhibits itself in the mixing parameters and increase of the density of the bubbles.
Assaf Shimony, Guy Malamud, Dov Shvarts
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Integer-ratio entrainment in mutually-coupled non-linear oscillators
Journal of Theoretical Biology, 1983Abstract In recent years entrainment conditions for mutually-coupled, non-linear oscillators have been studied for a number of biomedical applications and using different analytical methods. The emphasis has been on entrainment between oscillators of similar frequencies.
D.A. Linkens, R.I. Kitney
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Droplets entrainment ratio in a PWR hot-leg pipe geometry
Nuclear Engineering and Design, 2018Abstract Droplets entrainment was found to contribute to the occurrence of countercurrent flow limitation (CCFL) at COLLIDER test facility which has a PWR hot-leg pipe geometry with a large diameter value of 190 mm. Previous investigations showed that droplets entrainment starts to become observable at medium water inlet velocities (In Wallis ...
Suleiman Al Issa, Rafael Macian-Juan
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Entrainment ratio and entropy generation of vacuum-objective supersonic ejectors
2021Supersonic air ejectors are mechanical devices in which a supersonic primary air stream entrains a secondary air stream by creating suction. Because of their ability to use low-grade energy for their operation and the absence of moving parts, these ejectors are used in various sectors such as refrigeration and fluid transportation.
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On the anatomy of mantle plumes: effect of the viscosity ratio on entrainment and stirring
Earth and Planetary Science Letters, 2002Laminar entrainment of starting plumes with compositional buoyancy has been explored in a series of laboratory experiments. Two types of starting plume have been identified within the range of viscosity ratio ϵas of 10.4–856 (defined as the ratio of the ambient to the buoyant fluid).
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Vortex induction and mass entrainment in a small-aspect-ratio elliptic jet
Journal of Fluid Mechanics, 1987A passive technique of increasing entrainment was found by using a small-aspect-ratio elliptic jet. The entrainment ratio of an elliptic jet was several times greater than that of a circular jet or a plane jet. The self-induction of the asymmetric coherent structure caused azimuthal distortions which were responsible for engulfing large amounts of ...
Chih-Ming Ho, Ephraim Gutmark
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What Controls the Entrainment Rate of Dry Buoyant Thermals with Varying Initial Aspect Ratio?
Journal of the Atmospheric Sciences, 2023Abstract This study uses theory and numerical simulations to analyze the nondimensional spreading rate α (change in radius with height) of buoyant thermals as they rise and entrain surrounding environmental fluid. A focus is on how α varies with initial thermal aspect ratio Ar, defined as height divided by width of the initial buoyancy perturbation. An
Hugh Morrison +3 more
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Entrainment, axis switching, and aspect-ratio effects in rectangular free jets
4th Shear Flow Control Conference, 1997Results of numerical simulations of low aspect-ratio rectangular jets are used to relate unsteady entrainment and fluid dynamics in the transitional regime, to examine their basic topological features and the role of aspect ratio effects. Two qualitatively different flow topologies for rectangular jets are demonstrated, with non-unity AR rectangular ...
Fernando Grinstein, Fernando Grinstein
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