کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
762457 1462745 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Two-dimensional simulation of shallow-water waves by Lagrangian block advection
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
Two-dimensional simulation of shallow-water waves by Lagrangian block advection
چکیده انگلیسی

Waves in shallow water are computed by moving blocks of water in the direction of the flow using a Lagrangian method. The mass and momentum in the displaced-and-deformed blocks after the Lagrangian advection are re-distributed back on to the Eulerian mesh to form new blocks at every increment of time. This Lagrangian block advection guarantees for positive water depth. It also prevents the occurrence of unphysical numerical oscillations. Several numerically challenging problems are considered in a series of simulations using the method. The first problem is the tracking of wetting-and-drying interface in a parabolic bowl. The second problem is the capture of depth and velocity discontinuities across the shock waves. Finally, the block advection method is applied to calculate the flood waves overtopping a meandering river. The results of the simulations are compared with the exact solutions. The convergence of Lagrangian block advection towards the exact solutions is first-order accurate in the simulations of the depth-and-velocity discontinuities.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Fluids - Volume 65, 30 July 2012, Pages 35–43
نویسندگان
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