Results 11 to 20 of about 686,620 (189)
Nonlinear evolution of torsional Alfvén waves [PDF]
Astronomy & Astrophysics, 2012 Aims. We study the efficiency of the energy transfer to shorter scales in the field-aligned direction – the parallel nonlinear cascade – that accompanies the propagation of torsional Alfven waves along open magnetic fields in the solar and stellar coronae, and compare it with the same effects for the shear Alfven wave.
Vasheghani Farahani, S. +3 more
openaire +2 more sources
Photospheric magnetic vortex structures [PDF]
Annales Geophysicae, 2011 Using direct numerical magneto-hydrodynamic (MHD) simulations, we demonstrate the evidence of two physically different types of vortex motions in the solar photosphere.
S. Shelyag +4 more
doaj +3 more sources
Nonlinear long-wavelength torsional Alfvén waves [PDF]
Astronomy & Astrophysics, 2010 Aims. We investigate the nonlinear phenomena accompanying long-wavelength torsional waves in solar and stellar coronae. Methods. The second order thin flux-tube approximation is used to determine perturbations of a straight untwisted and non-rotating magnetic flux-tube, nonlinearly induced by long-wavelength axisymmetric magnetohydrodynamic waves of ...
Farahani, S. Vasheghani +3 more
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Torsional waves in a bowed string
, 2005 Bowing a string with a non-zero radius exerts a torque, which excites torsional waves. In general, torsional standing waves have higher fundamental frequencies than do transverse standing waves, and there is generally no harmonic relationship between them. Although torsional waves have little direct acoustic effect, the motion of the bow-string contact
Bavu, Eric, Smith, John, Wolfe, Joe
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Nonlinear Evolution of Short-wavelength Torsional Alfvén Waves [PDF]
The Astrophysical Journal, 2017 Abstract We analyze nonlinear evolution of torsional Alfvén waves in a straight magnetic flux tube filled in with a low-β plasma, and surrounded with a plasma of lower density. Such magnetic tubes model, in particular, a segment of a coronal loop or a polar plume. The wavelength is taken comparable to the tube radius.
S. V. Shestov +4 more
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Torsional vibration analysis of automotive drivelines [PDF]
, 1997 One of the most important source of noise and vibrations associated with vehicles is the vibration of driveline systems. Such phenomena are subjectively associated with customer complaints.
Rabeih, El-Adl Mohammed Aly
core +7 more sources
Wave operators, torsion, and Weitzenböck identities
General Relativity and Gravitation, 2022 22 pages, 2 ...
José Barrientos +3 more
openaire +5 more sources
Nonlinear Hysteretic Torsional Waves [PDF]
Physical Review Letters, 2015 We theoretically study and experimentally report the propagation of nonlinear hysteretic torsional pulses in a vertical granular chain made of cm-scale, self-hanged magnetic beads. As predicted by contact mechanics, the torsional coupling between two beads is found nonlinear hysteretic. This results in a nonlinear pulse distortion essentially different
Cabaret, J. +5 more
openaire +3 more sources
Torsional Alfvén waves in the Earth's core [PDF]
, 2015 Torsional Alfvén waves are theoretically predicted to exist in Earth's outer core, have been inferred from geophysical data and observed in geodynamo simulations.
Cox, Grace Alexandra
core +7 more sources
pp-waves with torsion and metric-affine gravity [PDF]
Classical and Quantum Gravity, 2005 A classical pp-wave is a 4-dimensional Lorentzian spacetime which admits a nonvanishing parallel spinor field; here the connection is assumed to be Levi-Civita. We generalise this definition to metric compatible spacetimes with torsion and describe basic properties of such spacetimes. We use our generalised pp-waves for constructing new explicit vacuum
Pasic, Vedad, Vassiliev, Dmitri
openaire +4 more sources