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发表刊物：Engineering Geology

关键字：Debris flow; Non-Newtonian fluid; HBP model; SPH simulation; Experiment test; 2010 Yohutagawa debris-flow event

摘要：A rational rheology model is critical for the numerical simulation of debris-flow behavior. The Bingham model commonly used in many current studies has failed to simulate the shear thickening and thinning phenomenon in experiments. We report an alternative solution by incorporating the Herschel-Bulkley-Papanastasiou (HBP) model with the smoothed particle hydrodynamic (SPH) method. The SPH simulation is based on the open-source DualSPHysics scheme, upon which we built a development by the Bingham-based rheology model in our previous study. In this paper, a straightforward improvement is made such that the HBP model is incorporated to describe the constitutive law between particles, extending the compatibility of the simulation to dilatant and pseudoplastic fluids. To illustrate the performance of the HBP-based SPH method, first, a sensitivity analysis was performed to investigate the influence of important rheological coefficients. The proposed method was then verified by a dam-break experiment of water-clay mixtures and the case study of the 2010 Yohutagawa debrisflow event in Japan. The results indicate a good accordance between simulation and observation. A discussion regarding the potential and limitations of the current method concludes the paper.

备注：中科院一区、TOP期刊

第一作者：（中科院一区、TOP期刊）Han Zheng, Su Bin, Li Yange, Wang Wei (Corresponding author), Wang Weidong, Huang Jianling, Chen Guangqi

论文类型：期刊论文

期号：255

页面范围：26-36

是否译文：否

发表时间：2019-04-19

收录刊物：SCI