Vortex Rings

by D. G. Akhmetov

Publisher: Springer-Verlag Berlin Heidelberg in Berlin, Heidelberg

Written in English
Published: Downloads: 966
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  • Engineering,
  • Hydraulic engineering,
  • Vibration

Edition Notes

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  "A vortex ring is a donut-shaped vortex that is generated by an instantaneous ejection of fluid from a circular orifice," said Akagi. "This resembles bubble rings made by dolphins.".   An extreme example of the vortex’s “reach out and touch someone” power is the military vortex gun, which uses explosives to drive air rings that can knock people over, or at least generate enough sound pressure to render an area uninhabitable. And the Shockwave Cannon created by Survival Research Labs delivers an invisible boot to the head. Product Title Vortex Optics Precison Riflescope Rings 2-Rings Average rating: 5 out of 5 stars, based on 16 reviews 16 ratings Current Price $ $ Mount Your Scope with Rings and Bases. You’ve found the perfect scope, now you need the proper mounts to secure it to your firearm. Our selection of scope rings and bases includes leading brands like Vortex, Burris, Leupold, and more, so you’ll find a quality scope mount for your optics.

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Vortex Rings by D. G. Akhmetov Download PDF EPUB FB2

This book presents a comprehensive coverage of the wide field of vortex rings. The book presents the results of systematic experimental investigations, theoretical foundation, as well as the practical applications of vortex rings, such as the extinction of fires at gushing gas and oil wells.

Chapter 1 outlines the vortex ring pinch-off phenomenon and how it relates to the initial stages of jet formations and subsequent jet behaviour, while Chapter 2 takes a closer look at the behaviour resulting from vortex ring impingement upon solid boundaries and how the use of a porous surface alters the impingement process.

Vortex flow is one of the fundamental types of fluid and gas motion. These flows are the most spectacular in the form of concentrated vortices, characterized by the localization of vorticity (curl of velocity) in bounded regions of a space, beyond which the vorticity is either absent or rapidly falls down to zero.

Concentrated vortices are often observed in nature, exemplified by atmospheric. The book presents the results of systematic experimental investigations, theoretical foundation, as well as the practical applications of vortex rings, such as the extinction of fires at gushing gas and oil wells.

All the basic properties of vortex rings as well as their hydrodynamic structures are presented. In nature, vortex rings are found to occur in various shapes and sizes.

Perhaps the most familiar example is the smoke-ring which is produced when cigarette smoke is ejected suddenly through the lips of a smoker. Another (more dramatic) example of a vortex ring is the mushroom-shaped cloud formed during an explosion. Overview Machined with certified USA T6 billet aluminum and held to an extremely tight tolerance of inches using a precision Computer Numeric Controlled (CNC) mill.

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Vortex Rings for sale at Call today to place your order () S78 O. Sano Fig. Velocity due to a vortex ring. Fig. Hill’s vortex ring. Velocity Induced by a Vortex Ring Ve locity field dv induced by a line element dx on the vortex ring with vorticity ω(x) is given by dv = ω(x)dx ×(x−x)4π|x−x |3,(2)which is the same form as the Biot-Savart’ law known in the.

Arken Optics Halo Picatinny/Weaver Matched Scope Mount Rings Fits 30mm and 34mm Various Height for Precision Shooting Hunting out of 5 stars 72 $ $ Vortex Rings Vortex rings are an intriguing marvel of fluid dynamics that are ubiquitous throughout nature. These toroidal, or donut-shaped vortices, are formed by blood flowing through the human heart, expelled as bubble rings rings by dolphin and other marine mammals for amusement, and even ejected from the craters of erupting volcanoes.

Vortex Rings. Annual Review of Fluid Mechanics Vol. (Volume publication date January ) Annual Review of Fluid Mechanics Vortex Dynamics in the Cylinder Wake C H K Williamson Annual Review of Fluid Mechanics Vortex Reconnection S Kida, and and M Takaoka.

‎In this book, recent developments in our understanding of fundamental vortex ring and jet dynamics will be discussed, with a view to shed light upon their near-field behaviour which underpins much of their far-field characteristics.

The chapters provide up-to-date research findings by their respecti. The Vortex Pro Picatinny-Style Rings are precision machined from T6 aluminum and finished with a durable matte black anodize.

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This book will be useful to postgraduate students and researchers alike who wish to get up to speed regarding the latest developments in vortex ring and jet flow behaviour and how their interesting flow dynamics may be put into good use in their intended applications.

Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

Vortex Ring Interaction with a Free Surface M. Song, N. Kachman, I. Kwon, L. Bernal, G. Tryggvason (The University of Michigan, USA) ABSTRACT The results of numerical and experimental studies on the. Dynamics of thin vortex rings in ğ) we have M pV p = ρΓπR2, () where M p is the mass of water displayed by the piston and V p =L/T is the velocity of the piston.

At the same time, when the ring is moving with its bubble at velocity V, M pV p = M bV, () where V is the velocity of the vortex ring and M b is the mass of fluid in the ring– bubble complex.

Vortex rings carrying positive as well as negative charge were observed; dynamically, however, they behaved alike, as one indeed expects because both the velocity and the energy associated with a vortex ring are determined by the properties of a large amount of fluid carried along with the ring rather than by the small charge coupled to it.

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A vortex ring, also called a toroidal vortex, is a torus-shaped vortex in a fluid or gas; that is, a region where the fluid mostly spins around an imaginary axis line that forms a closed dominant flow in a vortex ring is said to be toroidal, more precisely poloidal.

[clarification needed]Vortex rings are plentiful in turbulent flows of liquids and gases, but are rarely noticed unless. The easiest way to adjust your riflescope perfectly on your favorite rifle, the Vortex Viper Riflescope Rings offer secure and durable strength with every use.

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These customer written testimonials consist of consumer ratings, recommendations and feedback. The vortex ring state is a dangerous aerodynamic condition that may arise in helicopter flight, when a vortex ring system engulfs the rotor causing severe loss of ring state is sometimes referred to as settling with Federal Aviation Administration (FAA) sees these terms as synonymous, whereas Transport Canada sees them as two different phenomena.

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Scope Tube Diameter. Size. Vortex rings are shed from the tail of a swimming sh and it is observed that sh over a wide range of sizes produce vortices at a Strouhal number, based on the speed of the sh, of about This observation raises the question of whether this choice is optimal and if so, why.

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