On the stability and over-reflexion of hydromagnetic-gravity waves

I. A. Eltayeb*

*المؤلف المقابل لهذا العمل

نتاج البحث: المساهمة في مجلةArticleمراجعة النظراء

ملخص

The stability of a magnetic-velocity shear layer, of thickness L, to hydromagnetic-gravity waves of zonal wavenumber k is investigated analytically, within the Boussinesq approximation, in the situation where ∊(= kL) is small. It is found that, in addition to the unstable modes of the corresponding sheet, new modes of instability of growth rate of order ∊2 are also present provided one critical level exists within the layer. The existence of one critical level also effects over-reflexion of stable modes. Furthermore it is shown that a magnetic shear acting alone can lead to instability as well as effecting over-reflexion of stable modes.

اللغة الأصليةEnglish
الصفحات (من إلى)1-18
عدد الصفحات18
دوريةJournal of Fluid Mechanics
مستوى الصوت105
المعرِّفات الرقمية للأشياء
حالة النشرPublished - أبريل 1981

ASJC Scopus subject areas

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  • ???subjectarea.asjc.2200.2211???
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