APAKAH MAKSUD VORTEX RING dalam CORSICA?
Cincin vorteks
Cincin vorteks, juga dikenali sebagai vorteks toroidal, adalah torus berbentuk tusukan dalam cecair; iaitu rantau di mana bendalir kebanyakannya berputar di sekitar garis paksi khayalan yang membentuk gelung tertutup. Aliran dominan dalam cincin vorteks dikatakan toroidal, lebih tepat poloidal. Cincin vortex banyak terdapat dalam aliran cair dan gas yang bergolak, tetapi jarang diperhatikan melainkan gerakan cecair itu diturunkan oleh zarah yang digantung-seperti dalam cincin asap yang sering dihasilkan secara sengaja atau tidak sengaja oleh perokok. Cincin pusaran api juga merupakan helah yang biasa dihasilkan oleh pemakan api. Cincin vorteks yang dapat dilihat juga boleh dibentuk oleh penembakan artileri tertentu, dalam awan cendawan, dan dalam mikroburst. Cincin vorteks selalunya cenderung bergerak ke arah yang berserenjang dengan satah cincin dan dengan itu tepi dalaman cincin bergerak lebih cepat ke hadapan daripada kelebihan luar. Dalam cecair cecair, cincin vorteks boleh bergerak untuk jarak yang jauh, membawa cairan berputar dengannya.
Definisi vortex ring dalam kamus Corsica
Takrif cincin vorteks dalam kamus adalah perturbasi yang stabil dalam cecair yang mengambil bentuk torus di mana aliran berputar di bahagian torus supaya perbezaan tekanan di antara dan di luar torus mengimbangi tentera badan. Cincin vorteks yang paling terkenal adalah cincin asap.
CORSICA BUKU YANG BERKAIT DENGAN «VORTEX RING»
Ketahui penggunaan
vortex ring dalam pilihan bibliografi berikut. Buku yang berkait dengan
vortex ring dan ekstrak ringkas dari yang sama untuk menyediakan konteks penggunaannya dalam kesusasteraan Corsica.
This book presents a comprehensive coverage of the wide field of vortex rings.
2
Vorticity and
Vortex Dynamics
The simplest vortex loop is a circular vortex ring, which in a sense is a more
fundamental vortex structure than columnar vortices and can be easily produced
experimentally (e.g., by an impulsive motion of a piston), see Fig.4.22. Because
of ...
Jie-Zhi Wu, Hui-yang Ma, M.-D. Zhou,
2007
3
Vortex Methods and
Vortex Motion
Figure 4.16 shows vortex ring formation behind a delta wing in reverse, pitching
from 0° to 60° around the c/2 axis [49]. The vortex loop of the trailing edge vortex
necks down and in column 2, due to viscous-turbulent annihilation reconnection
...
Karl E. Gustafson, James A. Sethian,
1991
4
Fluid Vortices: Fluid Mechanics and Its Applications
However, in a viscous flow, the presence of the no-slip condition together with the
induced velocity field of the ring will cause new vorticity to be generated along
the boundary. This vorticity, which is of opposite sense to that of the vortex ring, ...
5
VORTEX RING INTERACTION WITH A FREE SURFACE.
generated by the contaminant gradient. The distribution of the contaminant during the interaction depends on the strength of the contamination. Results are also compared to a collision with a no-slip surface.
6
IUTAM Symposium on Hamiltonian Dynamics,
Vortex Structures, ...
Motion of an elliptic vortex ring is considered as an example of unsteady 3D
vortex motion. The Local Induction Equation is used for the analysis. By keeping
the self-induction constant and changing its value in the equation, different
features ...
Alexey V. Borisov, Valery V. Kozlov, Ivan S. Mamaev,
2007
13.12 Unsteady Lifting-Surface Solution by Vortex Ring Elements The method of
transforming steady-state flow based numerical solutions into the time-dependent
mode is described schematically in Fig. 13.25 and in the introduction to Section ...
Joseph Katz, Allen Plotkin,
2001
Taylor [1953[ examined the properties of the uniform vortex ring formed by coarse
-graining the rolled up sheet into a circular vortex ring of radius R, core radius c,
and circulation P. The hydrodynamic impulse of the ring is F7r/?2. Assuming that
...
9
Prevention of Hazardous Fires and Explosions: The Transfer ...
The Mechanism of the Diffusion Plume Extinguishing by the Vortex Ring The
plume extinguishing is accomplished when the vortex ring filled with dusted fire-
extinguishing powder moves along the spout axis to the top of the plume. The
vortex ...
10
Sedimentation and Sediment Transport
V_y(l/ (c) 30cm Figure 1: (a) Experimental setup, (b)-(d) schematic showing the
important stages of a vortex ring colliding with a solid boundary. source. Images
were captured from two different camera perspectives, the first looking down at
an ...
A. Gyr, Wolfgang Kinzelbach,
2003
BARANGAN BERITA YANG TERMASUK TERMA «VORTEX RING»
Ketahui apa yang diterbitkan oleh akhbar nasional dan antarabangsa dan cara istilah
vortex ring digunakan dalam konteks perkara berita berikut.
V-22 Highs and Lows
Like helicopters, the V-22 is susceptible to vortex ring state, a condition in descent in which vortices normally shed clear of the rotor blades become trapped ... «Aviation Today, Mei 15»
Military aviation expert believes engine failure or pilot error caused …
He also tells me by phone, that the Osprey engine is usually reliable so he is leaning toward pilot error. Vortex Ring State is when the rotor suddenly loses lift, ... «Hawaii News Now, Mei 15»
Is this a UFO? Eerie video shows bizarre black ring hovering over …
One viewer wrote: "A vortex ring or smoke ring can be formed in the atmosphere by a rising (falling) mass of warm (cold) air, which is also called a thermal ... «mirror.co.uk, Apr 15»
Soliton discovery was a false alarm
Some concluded that the region of lower density in the fluid was the result not of a soliton but of a vortex ring—a swirling, donut-shaped structure, around which ... «Futurity: Research News, Sep 14»
Local congressman fights for truth about Osprey crash in 2000
However, after multiple investigations, inspectors say they know what caused that plane to crash -- something called vortex ring state. It's a flying condition that, ... «WTVD-TV, Mei 14»
Hunt for an 'unidentified electron object'
This image shows vortex rings as the result of vortex multiplication in a quantum fluid. Some electrons are free, some got trapped by one or more vortices. Credit: ... «Phys.Org, Mac 14»
Solving a physics mystery: Those 'solitons' are really vortex rings
An example of a vortex ring, also called a toroidal bubble, which dolphins create under water. The concept of vortex rings lies at the heart of new University of ... «UW Today, Feb 14»
Vortex ring state suggested in North Sea helicopter crash
The Aug. 23 crash of a Eurocopter AS332 L2 Super Puma in the North Sea may have occurred when the helicopter entered vortex ring state in the final stages of ... «Vertical Magazine, Okt 13»
Jellyfish Even More Efficient Propulsors than Previously Believed …
Once believed to be a moment of pause for the jellyfish, the researchers found a second vortex ring that comes up the underside of the animal and gives its a ... «Nature World News, Okt 13»
New study reveals why jellyfish are such efficient swimmers (w/ Video)
Notice how the stopping vortex forms upstream and on the exumbrellar surface of the animal before recovery. The vortex ring then moves under the bell as … «Phys.Org, Okt 13»