کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
650903 1457327 2006 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Extreme waves, modulational instability and second order theory: wave flume experiments on irregular waves
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Extreme waves, modulational instability and second order theory: wave flume experiments on irregular waves
چکیده انگلیسی

Here we discuss the statistical properties of the surface elevation for long crested waves characterized by Jonswap spectra with random phases. Experiments are performed in deep water conditions in one of the largest wave tank facilities in the world. We show that for long-crested waves and for large values of the Benjamin–Feir index, the second order theory is not adequate to describe the tails of the probability density function of wave crests and wave heights. We show that the probability of finding an extreme wave can be underestimated by more than one order of magnitude if second order theory is considered. We explain these observed deviations in terms of the modulational instability mechanism that for large BFI can take place in random wave spectra.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Mechanics - B/Fluids - Volume 25, Issue 5, September–October 2006, Pages 586-601