کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
7221956 1470385 2018 16 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Internal rogue waves in stratified flows and the dynamics of wave packets
ترجمه فارسی عنوان
امواج داخلی سرخوردگی در جریان های طبقه بندی شده و پویایی بسته های موج
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
سفارش ترجمه تخصصی
با تضمین قیمت و کیفیت
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی
A theoretical study on the occurrence of internal rogue waves in density stratified flows is conducted. While internal rogue waves for long wave models have been studied in the literature, the focus here is on unexpectedly large amplitude displacements arising from the propagation of slowly varying wave packets. In the first stage of the analysis we calculate new exact solutions of the linear modal equations in a finite domain for realistic stratification profiles. These exact solutions are then used to facilitate the calculations of the second harmonic and the induced mean motion, leading to a nonlinear Schrödinger equation for the evolution of a wave packet. The dispersion and nonlinear coefficients then determine the likelihood for the occurrence of rogue waves. Several cases of buoyancy frequency (N) are investigated. For N2 profiles of hyperbolic secant form, rogue waves are unlikely to occur as the dispersion and nonlinear coefficients are of opposite signs. For N2 taking constant values, rogue waves will arise for reasonably small carrier envelope wavenumbers, in sharp contrast with the situation for a free surface, where the condition is kh > 1.363 (k = wavenumber of the carrier envelope, h = depth). Finally, a special N2 profile permits an analytical treatment for a linear shear current. Unexpectedly large amplitude waves are possible as the dispersion and nonlinear coefficients can then be of the same sign.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nonlinear Analysis: Real World Applications - Volume 44, December 2018, Pages 449-464
نویسندگان
, , , ,
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
سفارش ترجمه تخصصی
با تضمین قیمت و کیفیت