Energy and Helicity
Distortional Lifshitz Vectors and Helicity in Nematic Free Energy Density
... free energy density is assumed as a true ...free energy density “of course, have to be true invariant ...internal energy and volume, behave like ...the energy density like a ...free ...
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Analysis of Energy Conversion during Co- and Counter-Helicity Spheromak Merging by Particle-In-Cell Simulation
... Several numerical simulations of plasma merging have previously been reported. First, MHD simulations of spheromak merging were performed in cylindrical coordi- nates. They showed that the bouncing motion caused by ...
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Magnetic helicity condensation and the solar cycle
... of helicity condensation for the Sun ’ s hemi- spheric pattern of fi lament ...positive helicity, dominate in the northern / southern ...magnetic helicity across the solar surface and its localization ...
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Helicity and Physical Fidelity in Turbulence Modeling
... its helicity treatment, the Leray-deconvolution tur- bulence model is a higher order and more accurate generalization of the Leray model, and the energy and helicity conserving (trapezoidal Galerkin) ...
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Analysis of mean and fluctuating helicity measured by TomoPIV in swirling jet
... of helicity was theoretically predicted for the generation of large-scale magnetic fields and atmospheric ...vortices. Helicity can lead to a reduction of turbulent dissipation in the atmosphere or in a ...
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Trefoil knot timescales for reconnection and helicity
... positive helicity and enstrophy within the envelope of the trefoil and the appearance of negative helicity increasingly far from the centre of the ...when helicity finally begins to decay and finite ...
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Parton Momentum and Helicity Distributions in the Nucleon
... ∆d + /d + ratio, on the other hand, remains negative for all x where it is constrained, and shows no indication of the upturn predicted by the helicity conservation models. The nuclear and finite-Q 2 effects can ...
Optical receiver with helicity dependent magnetization eversal
... propose helicity-dependent switching (HDS) of magnetization in Co/Pt for an energy efficient optical ...light helicity induced switching of magnetization which can avoid the requirement of ...
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Hyperconjugation is the source of helicity in perfluorinated n alkanes
... resulting energy differences between zig-zag and helical structures are plotted in Figure 5a, with the ΔE(Tot) values closely following the ΔE(L) values in Figure 4 (which are based on charges from natural ...
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W helicity, top quark spin and charge
... The precision of the majority of the results discussed in this document is limited by the systematic uncertainties. The most important are the jet energy scale calibration, t t ¯ signal model and the knowledge of ...
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Magnetic helicity of a flux rope in the magnetotail: THEMIS results
... the helicity in the flux rope originates from the IMF-geomagnetic fields interaction which is the beginning of a series of changes in the magnetospheric ...the helicity of the plasma sheet flux rope is an ...
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Forcing-dependent dynamics and emergence of helicity in rotating turbulence
... The runs that are forced with the highly random-in-time forcing seem to have a k −5/2 scaling. As τ m increases the spectra start to deviate gradually from the k −5/2 scaling towards a k −2 and finally reach a k −5/3 ...
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Evolution of field line helicity during magnetic reconnection
... total helicity is approximately conserved on the timescale during which magnetic reconnection rear- ranges an initially complex magnetic field is ...that helicity decay occurs on a diffusive time scale that ...
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The decay of isotropic magnetohydrodynamics turbulence and the effects of cross-helicity
... magnetic helicity (not studied here) and total energy, MHD turbulence has a third inviscid invariant, namely cross-helicity, which is the scalar product of the fluctuating velocity and magnetic ...
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Optical helicity, optical spin and related quantities in electromagnetic theory
... optical helicity, the optical spin and the ij-infra- zilches in electromagnetic theory and show that these conserved quantities can be combined to form a new description of the angular momentum associated with ...
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On the helicity characteristics and induced emf of magnetic-Coriolis wave packets
... the helicity characteristics and induced emf of MC wave packets 19 classify as they are characterised by a lower energy density and varying degrees of cross helic- ity, though at low-Le these wave packets ...
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Magnetic helicity and force free equilibria in the solar corona and in laboratory devices
... lower energy, and therefore would be the one we would expect to observe in practice? To answer this question, we must make use of a result given by Taylor (1986), although not rigorously proved in his ...lowest ...
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Evolution of magnetic helicity during eruptive flares and coronal mass ejections
... Changes δI cs , δI R , and δI U , to those currents change the free energy by an amount which is, to leading order, δ(W ) = (L cs δI cs + M cs,U δI U + M cs,R δI R )I cs . Reconnection will decrease the current in ...
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Dirac Hamiltonian with Imaginary Mass and Induced Helicity—Dependence by Indefinite Metric
... real energy eigenvalues and complex resonance and anti-resonance ...right-handed helicity acquire a negative norm (“indefinite metric”) and can be excluded from the physical spectrum by a Gupta-Bleuler type ...
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Model independent measurement of the W boson helicity in top quark decays
... Ensembles are formed by drawing events from a model with the parameter under study varied. These are compared to the standard cos templates in a maximum likelihood fit. The average shifts in the resulting f 0 and f ...
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