کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1865454 1037835 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Density fluctuation spectrum in whistler turbulence
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
Density fluctuation spectrum in whistler turbulence
چکیده انگلیسی

We develop a nonlinear two-dimensional fluid model of whistler turbulence that includes effect of electron fluid density perturbations. The latter is coupled nonlinearly with wave magnetic field. This coupling leads essentially to finite compressibility effects in whistler turbulence model. We find from our simulations that despite strong compressibility effects, the density fluctuations follow the evolution of the wave magnetic field fluctuations. In a characteristic regime where large scale whistlers are predominant, the coupled density fluctuations are found to follow a Kolmogorov-like phenomenology in the inertial range turbulence. Consequently, the turbulent energy is dominated by the large scale (compared to electron inertial length) eddies and it follows a Kolmogorov-like k−7/3k−7/3 spectrum, where k is a characteristic wavenumber.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 374, Issue 25, 31 May 2010, Pages 2551–2554
نویسندگان
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