کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8883403 | 1625600 | 2018 | 60 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A SPH elastic-viscoplastic model for granular flows and bed-load transport
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A SPH elastic-viscoplastic model for granular flows and bed-load transport A SPH elastic-viscoplastic model for granular flows and bed-load transport](/preview/png/8883403.png)
چکیده انگلیسی
An elastic-viscoplastic model (Ulrich, 2013) is combined to a multi-phase SPH formulation (Hu and Adams, 2006; Ghaitanellis et al., 2015) to model granular flows and non-cohesive sediment transport. The soil is treated as a continuum exhibiting a viscoplastic behaviour. Thus, below a critical shear stress (i.e. the yield stress), the soil is assumed to behave as an isotropic linear-elastic solid. When the yield stress is exceeded, the soil flows and behaves as a shear-thinning fluid. A liquid-solid transition threshold based on the granular material properties is proposed, so as to make the model free of numerical parameter. The yield stress is obtained from Drucker-Prager criterion that requires an accurate computation of the effective stress in the soil. A novel method is proposed to compute the effective stress in SPH, solving a Laplace equation. The model is applied to a two-dimensional soil collapse (Bui et al., 2008) and a dam break over mobile beds (Spinewine and Zech, 2007). Results are compared with experimental data and a good agreement is obtained.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Water Resources - Volume 111, January 2018, Pages 156-173
Journal: Advances in Water Resources - Volume 111, January 2018, Pages 156-173
نویسندگان
Alex Ghaïtanellis, Damien Violeau, Martin Ferrand, Kamal El Kadi Abderrezzak, Agnès Leroy, Antoine Joly,