کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4992260 | 1457258 | 2017 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A global approximation to the Green function for diffraction radiation of water waves
ترجمه فارسی عنوان
یک تقریب جهانی به تابع سبز برای تابش پراش امواج آب
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کلمات کلیدی
امواج آب معمولی، تابش دیفرانسیل، عملکرد سبز، جریان محلی، تقریبی جهانی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The Green function of the theory of diffraction radiation of time-harmonic (regular) waves by an offshore structure, or a ship at low speed, in deep water is considered. The Green function G and its gradient âG are expressed in the usual manner as the sum of three components that correspond to the fundamental free-space singularity, a non-oscillatory local flow, and waves. Simple approximations that only involve elementary continuous functions (algebraic, exponential, logarithmic) of real arguments are given for the local flow components in G and âG. These approximations are global approximations valid within the entire flow region, rather than within complementary contiguous regions as can be found in the literature. The analysis of the errors associated with the approximations to the local flow components given in the study shows that the approximations are sufficiently accurate for practical purposes. These global approximations provide a particularly simple and highly efficient way of numerically evaluating the Green function and its gradient for diffraction radiation of time-harmonic waves in deep water.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Mechanics - B/Fluids - Volume 65, SeptemberâOctober 2017, Pages 54-64
Journal: European Journal of Mechanics - B/Fluids - Volume 65, SeptemberâOctober 2017, Pages 54-64
نویسندگان
Huiyu Wu, Chenliang Zhang, Yi Zhu, Wei Li, Decheng Wan, Francis Noblesse,