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Study on the Self-Sustaining Inlet Boundary Conditions for Numerical Simulation on Local Scour
| 题名： | Study on the Self-Sustaining Inlet Boundary Conditions for Numerical Simulation on Local Scour |
| 正文语种： | 英文 |
| 作者： | Peng Yu; Junfeng Liu; Zewen Sun |
| 作者单位： | Dongguan Univ, of Technology |
| 摘要： | In previous numerical simulations of local scour, the steady flow is normally adopted as the inlet boundary condition, and the approach flow is always assumed as a homogeneous isotropic turbulence. In the present study, the results turn out to be different from such previous cases, even without obstructions. Under conventional methods, the approach flow decays along the stream wise in the computational domain. Meanwhile, in order to ensure the simulation effect for some major projects such as the local scour around bridge piers and submarine pipelines, appropriate inlet boundary conditions and its self-sustaining character become some of the important factors. Therefore, in the present study, a novel self-sustaining model with the standard k-c turbulence model is proposed to quickly obtain a homogeneous isotropic turbulence. The model parameters are discussed in the light of flume experiment data by sensitivity analysis. To verify the applicability of the proposed model and inlet boundary conditions, numerical simulations in an empty domain are also performed. It is shown that the novel self-sustaining model and corresponding inlet boundary can produce a homogeneous isotropic turbulence, which will help to guarantee fine numerical simulations for scour prediction with prescribed flow conditions. |
| 出版日期： | 2020.09-10 |
| 出版年： | 2020 |
| 期刊名称： | Journal of Waterway, Port, Coastal, and Ocean Engineering |
| 卷： | Vol.146 |
| 期： | No.05 |
| 页码： | 04020027 |
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