| Status | 已發表Published |
| Two-phase SPH simulations of erosional dam-break floods using Graphics Processing Units | |
Shi, H.
| |
| 2020-12-12 | |
| Source Publication | Proceedings of the 8th International Conference on the Application of Physical Modelling in Coastal and Port Engineering and Science
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| Abstract | A two-phase SPH model based on a continuum description of solid-fluid mixtures is proposed for violent surface water flows induced by dam breaks on erodible beds. In the model, the water and the sediment are governed by t e conservative laws of mass and momentum. A constitutive law based on the rheology of dense granular flow is employed for the inter-granular stresses of sediment phase. An integrated formulation of the Ergun equation for dense solid-liquid mixtures and the power law for dilute suspensions is adopted for the inter-phase drag. The solid-liquid mixture is represented by a single set of Lagrangian SPH particles, which move with the water velocity while carry the quantities of both phases. The computations are conducted in parallel using Graphics Processing Units (GPU). The model is applied to erosional dam-break floods on movable beds of different initial configurations. The temporal evolutions of the water surface, the bed profiles, and the dam-break wave front are in good agreement with the measured data. Scaling laws of the wave front propagation with the water depth and the bed compositions are discussed. It is shown that the proposed model performs well in the simulations of intense sediment transport by violent free surface water flows. |
| Keyword | Two-phase SPH model GPU computing Erosion dam-break floods Intense sediment transport Free surface flows |
| Language | 英語English |
| The Source to Article | PB_Publication |
| PUB ID | 60711 |
| Document Type | Conference paper |
| Collection | THE STATE KEY LABORATORY OF INTERNET OF THINGS FOR SMART CITY (UNIVERSITY OF MACAU) |
| Corresponding Author | Shi, H. |
| Recommended Citation GB/T 7714 | Shi, H.. Two-phase SPH simulations of erosional dam-break floods using Graphics Processing Units[C], 2020. |
| APA | Shi, H..(2020). Two-phase SPH simulations of erosional dam-break floods using Graphics Processing Units. Proceedings of the 8th International Conference on the Application of Physical Modelling in Coastal and Port Engineering and Science. |
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