期刊
WATER
卷 14, 期 20, 页码 -出版社
MDPI
DOI: 10.3390/w14203290
关键词
jet erosion test; sediment transport; numerical modeling; two-phase flow model; experiments; water injection dredging
资金
- Quebec Ministry of Foreign Affairs (MRIF) [AVOCAP-2021-2023]
- Mexican Council of Science and Technology
- Jiangsu Science and Technology Programme [RRSP10120220131]
- NSERC-Discovery program [RGPIN-2018-0677]
- ComputeCanada [3148]
This paper presents experimental and numerical studies on the erosion of a horizontal granular bed by a two-dimensional plane vertical impinging jet. The simulations help understand the microscopic processes that govern erosion in this complex flow. A unique relationship between the crater size and a local Shields parameter is successfully obtained using a modified jet-bed distance.
This paper presents experimental and numerical studies on the erosion of a horizontal granular bed by a two-dimensional plane vertical impinging jet to predict the eroded craters' size scaling (depth and width). The simulations help understand the microscopic processes that govern erosion in this complex flow. A modified jet-bed distance, accounting for the plane jet virtual origin, is successfully used to obtain a unique relationship between the crater size and a local Shields parameter. This work develops a two-phase flow numerical model to reproduce the experimental results. The numerical techniques are based on a finite volume formulation to approximate spatial derivatives, a projection technique to calculate the pressure and velocity for each phase, and a staggered grid to avoid spurious oscillations. Different options for the sediment's solid-to-liquid transition during erosion are proposed, tested, and discussed. One model is based on unified equations of continuum mechanics, others on modified closure equations for viscosity or momentum transfer. A good agreement between the numerical solutions and the experimental measurements is obtained.
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