کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
773165 | 1463315 | 2008 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Aeration and bubble measurements of coastal breaking waves
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The air entrainment process of surf zone waves is studied experimentally to understand as a first step of two-phase characteristics of surf zone breaking waves. A set of laboratory experiments of free surface elevation, water velocity, void fraction and bubble distribution is conducted simultaneously for regular gravity wave breaking on a plane slope. The in situ data are collected by using a measurement array of wave gages, a dual-tip resistivity void fraction probe and an acoustic Doppler velocimeter. Two-dimensional projected bubble size measurements are conduced by the high speed camera with imaging technique. The experimental data show a linear relationship between the void fraction and turbulent intensity. In addition, the bubble size distributions are proportional to the bubble size to the power of -1 and -3.4 independent of the distance from breaking point and water depth. The length scale separating two power laws is the Hinze scale which corresponds to the wave energy dissipation scale. This result will be important for modeling and implication for the study of surf zone dynamics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fluid Dynamics Research - Volume 40, Issues 7â8, JulyâAugust 2008, Pages 616-626
Journal: Fluid Dynamics Research - Volume 40, Issues 7â8, JulyâAugust 2008, Pages 616-626
نویسندگان
Nobuhito Mori, Shohachi Kakuno,