Vortex Ring
The role of vortex ring formation and pressure drop on dynamics of the left ventricle during diastole
... In the field of cardiology, the current ability to accurately detect diastolic dysfunction is unsatisfactory due to the lack of an effective diagnostic index. Currently, assessments of diastolic dysfunction are based on ...
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Sound generation by the interaction of a vortex ring with a rigid sphere
... the vortex ring passes over the sphere, its radius stretches while its cross-section becomes thinner ...the vortex core becomes deformed, as it acquires a predominantly elliptic shape with flat side ...
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Investigation of the Vortex Ring Transition using Scanning Tomo-PIV
... 3D vortex ring, which is sufficient in resolving its ...of vortex ring from formation to final turbulent breakdown lasts longer than the measure- ment duration, the imaging trigger is sent ...
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Transition of a vortex ring measured by 3D scanning Tomo-PIV
... the vortex ring’s transition from laminar to ...the ring torus as well as the generation of secondary vortex filaments in transition are first observed through 3D ...the vortex ring, ...
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Vortex-ring Modeling of Complex Systems and Mendeleev’s Table
... electrons have opposite vortex-ring orientation [10]). Each orbital can hold two electrons with opposite spins. The term shell is used for a group of orbitals with the same principal quantum number. A ...
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Transition of A Vortex Ring Visualized by 3D Scanning TomoPIV
... the vortex ring’s transition from laminar to ...the ring torus as well as the generation of secondary vortex filaments in transition are first observed through 3D ...the vortex ring, ...
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Vortex-ring-fractal Structure of Hydrogen Atom
... a vortex-ring- fractal theory ...the vortex-ring-fractal modeling of elements in the Mendeleev’s periodic table, which is not in contradiction to the known laws of ...a ...
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Optimal transient growth on a vortex ring and its transition via cascade of ringlets
... of vortex rings induced by transient perturbation growth around the ...involving vortex rings. For example, in the heart flow, the process of vortex ring formation has been found to influence ...
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The interaction of a vortex ring with a sloped sediment layer: critical criteria for incipient grain motion
... The fluid and sediment velocity fields were obtained in terms of the right-handed Cartesian coordinates (x, y, z), defined with the (x, y)-axes in the transverse plane of the bed and the positive z-axis directed normal ...
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Generation and Transport of Solid Particle Clusters Using a Vortex Ring Launched into Water - Volume 8 Number 4 (Aug. 2017) - IJCEA
... a vortex ring in the air [4]. A vortex ring was launched into quiescent air, and spherical glass particles were arranged along its ...the vortex ring to entrain the particles and ...
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A study of vortex ring generation by a circular disc with its application in bionic investigation
... phase, vortex ring appears symmetrically in Y-Z and X-Y ...two vortex core sections have symmetric coordinates about the ...the vortex ring begins to show asymmetric behaviours, ...
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ANALYSIS OF THE INFLUENCE OF HELICOPTER DESCENT VELOCITY CHANGES ON THE PHENOMENON OF VORTEX RING STATE
... The aim of the present paper was to make the simulation of the manoeuvre when helicopter ex - ceeds theoretical conditions of vortex ring state. Three calculation cases were considered. All of them covered ...
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A constrained vortex model with relevance to helicopter vortex ring state
... wound vortex, which then descends with a helical structure under the ...the vortex cores (e.g. Fig 2.2 in Leishman [2]). A similar vortex pattern occurs when a helicopter descends rapidly in the ...
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Short wavelength instability in the vortex ring during impingement onto a solid wall
... Citation: Sun, Z. ORCID: 0000-0002-3862-7939, Li, Q. and Bruecker, C. ORCID: 0000- 0001-5834-3020 (2018). Short wavelength instability in the vortex ring during impingement onto a solid wall. Paper ...
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4D visualization study of a vortex ring life cycle using modal analyses
... the vortex ring in a reference frame which is co-moving with the vortex ...the vortex ring from birth to ...the ring-vortex undergoes ...the ring in the second ...
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The study of vortex ring/wall interaction for artificial nose improvement
... isolated vortex–ring impinging on a wall is well suited for test–gases impulsively injected with a frequency lower than the overall time scale of the ...The vortex dynamics at the wall in the oblique ...
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Wake structure and kinematics in the vortex ring state
... low so that much of the weak vortical structure is exposed. The wake appears to consist mostly of fragmented vortex filaments, orientated or- thogonally to the core of a large toroid of vorticity about which they ...
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Transport element method for axisymmetric variable-density flow and its application to the spread and dispersion of a dense cloud
... Since the major diculty rests on the study of the rst stage, on which the dispersion of the later stage depends, several analytical and numerical models have been developed. Detailed reviews can be found in 1] and 15]. ...
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Numerical investigation of the effect of cannula placement on thrombosis
... of vortex dynamics, including the vortex core area, intensity and propagation velocity, has attracted wide interests ...the vortex dynamics [29] and serve as a useful diagnostic ...highest ...
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