کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4551974 1627755 2015 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A two-layer granular landslide model for tsunami wave generation: Theory and computation
ترجمه فارسی عنوان
مدل لغزش دو لایه برای تولید موج سونامی: نظریه و محاسبات
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
چکیده انگلیسی


• A new two-layer model for granular landslide motion and tsunami wave generation is developed.
• The model is validated by the laboratory measurements of impulse waves generated by 2D/3D granular landslides.
• The model reasonably predicts the tsunami wave generation by granular landslides.
• The model can capture granular landslide motion from initiation to deposition.

We develop and test a new two-layer model for granular landslide motion and tsunami wave generation. The landslide is described as a saturated granular flow, accounting for intergranular stresses governed by Coulomb friction. Tsunami wave generation is simulated by the three-dimensional non-hydrostatic wave model NHWAVE, which is capable of capturing wave dispersion efficiently using a small number of discretized vertical levels. Depth-averaged governing equations for the granular landslide are derived in a slope-oriented coordinate system, taking into account the dynamic interaction between the lower-layer granular landslide and upper-layer water motion. The model is tested against an analytical solution for granular dam-break flow and 2D and 3D laboratory experiments on impulsive wave generation by subaerial granular landslides. Model results illustrate a complex interplay between the granular landslide and tsunami waves, and they reasonably predict not only the tsunami wave generation but also the granular landslide motion from initiation to deposition.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ocean Modelling - Volume 93, September 2015, Pages 40–55
نویسندگان
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