کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7155836 1462639 2018 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A semi-Lagrangian splitting method for the numerical simulation of sediment transport with free surface flows
ترجمه فارسی عنوان
روش تقسیم نیمه لاگرانژ برای شبیه سازی عددی انتقال رسوب با جریانهای آزاد
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
چکیده انگلیسی
We present a numerical model for the simulation of 3D poly-dispersed sediment transport in a Newtonian flow with free surfaces. The physical model is based on a mixture model for multiphase flows. The Navier-Stokes equations are coupled with the transport and deposition of the particle concentrations, and a volume-of-fluid approach to track the free surface between water and air. The numerical algorithm relies on operator-splitting to decouple advection and diffusion phenomena. Two grids are used, based on unstructured finite elements for diffusion and an appropriate combination of the characteristics method with Godunov's method for advection on a structured grid. The numerical model is validated through numerical experiments. Simulation results are compared with experimental results in various situations for mono-disperse and bi-disperse sediments, and the calibration of the model is performed using, in particular, erosion experiments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Fluids - Volume 172, 30 August 2018, Pages 384-396
نویسندگان
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