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Solution of Magnetohydrodynamic Oscillations in Electrolytes with Ion-Neutral Collisions
Liu Yuan-Tao; Zhao Hua; Li Lei; Feng Yong-Yong; Liu, YT (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China.
Department空间科学部
Source PublicationCHINESE PHYSICS LETTERS
2012
Volume29Issue:11Pages:115201
ISSN0256-307X
Language英语
AbstractThe single-fluid Magnetohydrodynamic (MHD) equations for electrolytes in the presence of a magnetic field are derived from multi-fluid MHD equations with ion-neutral collisions in partially ionized conductive fluids. The dispersion relationship of MHD waves is also investigated, which is different from that for plasmas or liquid metals. Based on the equations, we find that MHD waves are dispersive in electrolytes, and the critical frequencies for excitation of Alfven waves vary with magnetic field or conductivity, so the exciting of MHD waves is severely restricted in electrolytes with relatively low conductivity except at an extremely low frequency or when it is permeated by a considerably strong ambient magnetic field. These theories are applied to seawater to estimate the magnetic field vibration caused by the large-scale motion of seawater (e. g., ocean currents or tides). It is found that high frequency waves are dampened severely in seawater, while low frequency waves can propagate over a long distance without much attenuation.; The single-fluid Magnetohydrodynamic (MHD) equations for electrolytes in the presence of a magnetic field are derived from multi-fluid MHD equations with ion-neutral collisions in partially ionized conductive fluids. The dispersion relationship of MHD waves is also investigated, which is different from that for plasmas or liquid metals. Based on the equations, we find that MHD waves are dispersive in electrolytes, and the critical frequencies for excitation of Alfven waves vary with magnetic field or conductivity, so the exciting of MHD waves is severely restricted in electrolytes with relatively low conductivity except at an extremely low frequency or when it is permeated by a considerably strong ambient magnetic field. These theories are applied to seawater to estimate the magnetic field vibration caused by the large-scale motion of seawater (e. g., ocean currents or tides). It is found that high frequency waves are dampened severely in seawater, while low frequency waves can propagate over a long distance without much attenuation.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/3215
Collection空间科学部
Corresponding AuthorLiu, YT (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Liu Yuan-Tao,Zhao Hua,Li Lei,et al. Solution of Magnetohydrodynamic Oscillations in Electrolytes with Ion-Neutral Collisions[J]. CHINESE PHYSICS LETTERS,2012,29(11):115201.
APA Liu Yuan-Tao,Zhao Hua,Li Lei,Feng Yong-Yong,&Liu, YT .(2012).Solution of Magnetohydrodynamic Oscillations in Electrolytes with Ion-Neutral Collisions.CHINESE PHYSICS LETTERS,29(11),115201.
MLA Liu Yuan-Tao,et al."Solution of Magnetohydrodynamic Oscillations in Electrolytes with Ion-Neutral Collisions".CHINESE PHYSICS LETTERS 29.11(2012):115201.
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