Transmission of acoustic wave energy across a magnetic flux sheath

Solar Physics ◽  
1977 ◽  
Vol 54 (2) ◽  
pp. 371-375
Author(s):  
P. Venkatakrishnan ◽  
M. H. Gokhale
Keyword(s):  
Magnetic Flux ◽  
Acoustic Wave ◽  
Wave Energy

Surface acoustic wave energy transfer in an air‐gap‐coupled Bi12GeO20‐CdS system

1976 ◽  
Vol 47 (11) ◽  
pp. 4800-4803
Author(s):  
G. Cambon ◽  
A. Saïssy ◽  
M. Rouzeyre
Keyword(s):  
Energy Transfer ◽  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Wave Energy ◽  
Air Gap

scholarly journals Propagation of ion acoustic wave energy in the plume of a high-current LaB6 hollow cathode

2017 ◽  
Vol 96 (2) ◽  
Author(s):  
Benjamin A. Jorns ◽  
Christoper Dodson ◽  
Dan M. Goebel ◽  
Richard Wirz
Keyword(s):  
Acoustic Wave ◽  
Wave Energy ◽  
Hollow Cathode ◽  
High Current ◽  
Ion Acoustic Wave ◽  
Ion Acoustic

Acoustic wave energy absorption and distributed heat sources upon an acoustic impact on media

2016 ◽  
Vol 54 (1) ◽  
pp. 56-61 ◽  
Author(s):  
G. R. Izmailova ◽  
L. A. Kovaleva ◽  
N. M. Nasyrov
Keyword(s):  
Acoustic Wave ◽  
Energy Absorption ◽  
Wave Energy ◽  
Heat Sources ◽  
Acoustic Impact

Generation of nonlinear magnetic flux tube wave energies in Procyon A

2019 ◽  
Author(s):  
D E Fawzy ◽  
A T Saygac ◽  
K Stȩpień
Keyword(s):  
Magnetic Flux ◽  
Acoustic Wave ◽  
Flux Tube ◽  
Convection Zone ◽  
Frequency Factor ◽  
Turbulent Energy ◽  
Current Approach ◽  
Magnetic Flux Tube ◽  
Tube Wave ◽  
Wave Modes

Abstract The aim of the current study is the computation of the magnetic flux tube wave energies and fluxes generated in the convection zone of Procyon A. This is a subgiant of spectral type F5 IV-V showing chromospheric and coronal activities. The mechanisms responsible for the generation of different wave modes include the interaction of the thin and vertically oriented magnetic flux tube embedded in magnetic-free regions with turbulence in the convection zone of Procyon A. We are considering longitudinal, transverse and acoustic wave modes. Turbulence in the convection zone is modeled by the extended Kolmogorov turbulent energy spectrum and the modified Gaussian frequency factor. Different magnetic flux tube models with different degrees of magnetic activities were considered. The current approach takes the nonlinear effects into consideration. The results show that there is enough wave energy in the three different forms to heat the outer layers of the star. The obtained acoustic wave energies are larger than those of the longitudinal tube wave energies compared to the solar case. This can be explained by the relatively low magnetic field strength. On the other side, our computations show the importance of the transverse wave energies compared to the energies carried by the longitudinal waves. The former waves carry energy several (between 2 and 14) times higher than the latter. The obtained wave energies are essential for constructing time-dependent model chromospheres and for the predictions of atmospheric oscillations to be compared e.g. with the data collected by the CoRoT and Kepler missions.

Theoretical and experimental study on the acoustic wave energy after the nonlinear interaction of acoustic waves in aqueous media

2015 ◽  
Vol 29 (4) ◽  
pp. 611-621 ◽  
Author(s):  
Chao-feng Lan ◽  
Feng-chen Li ◽  
Huan Chen ◽  
Di Lu ◽  
De-sen Yang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Acoustic Wave ◽  
Wave Energy ◽  
Nonlinear Interaction ◽  
Acoustic Waves ◽  
Aqueous Media

scholarly journals Acoustic wave driven mass loss in late-type giant stars

1987 ◽  
Vol 122 ◽  
pp. 325-326 ◽  
Author(s):  
M. Cuntz ◽  
L. Hartmann ◽  
P. Ulmschneider
Keyword(s):  
Acoustic Wave ◽  
Mass Loss ◽  
Wave Field ◽  
Wave Energy ◽  
Acoustic Waves ◽  
Late Type ◽  
Large Wave ◽  
Giant Stars ◽  
Wave Energy Flux ◽  
Type Giant

Mass loss generated by radiatively damped acoustic waves is investigated. We find that a persistent wave energy flux leads to extended chromospheres. Mass loss is quite likely produced if the wave field retains a transient character and if large wave periods are used.

Resonant mode conversion of a shear Alfvén wave

1987 ◽  
Vol 65 (4) ◽  
pp. 357-358
Author(s):  
Bhimsen K. Shivamoggi
Keyword(s):  
Solar Wind ◽  
Acoustic Wave ◽  
Wave Energy ◽  
Mode Conversion ◽  
Resonant Absorption ◽  
Resonant Mode ◽  
Alfven Wave ◽  
Ion Acoustic Wave ◽  
Ion Acoustic ◽  
Kinetic Alfven Wave

A new mechanism for the resonant absorption of a shear Alfvén wave is proposed that involves a direct mode conversion of the latter to an ion-acoustic wave without bringing in the intermediary — the kinetic Alfvén wave. The fraction of the incident Alfvén-wave energy that is mode-converted to an ion-acoustic wave is calculated. This mechanism likely operates in the solar wind, where it might lead to heating of the plasma.

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