| Modeling of Motion of Particle Clouds Formed by Dumping Dredged Material |
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| 作者姓名： | YING Xinya |
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| 作者单位： | Department of Civil Engineering，Zhejiang University，Department of Civil Engineering，Kyushu Institute of Technology，Department of Civil Engineering，Zhejiang University Hangzhou 310027，China，Kitakyushu City，Japan，Hangzhou 310027，China |
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| 摘 要： | The motion of particle clouds formed by dumping dredged material into quiescent waters is experimentally and numerically studied. In the numerical model, the particle phase is modeled by the dispersion model, and turbulence is calculated by the large eddy simulation. The governing equations, including the filtered Navier-Stokes equations and mass transport equation, are solved based on the operator-splitting algorithm and an implicit cubic spline interpolation scheme. The eddy viscosity is evaluated by the modified Smagorinsky model including the buoyancy term. Comparisons of main flow characteristics, including shape, size, average density excess, moving speed and the amount of particles deposited on the bed, between experimental and computational results show that the numerical model well predicts the motion of the cloud from the falling to spreading stage. The effects of silt-fence on the motion of the particle cloud are also investigated.
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Modeling of Motion of Particle Clouds Formed by Dumping Dredged Material |
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| YING Xinya Juichiro AKIYAMAand MAO Genhai.Modeling of Motion of Particle Clouds Formed by Dumping Dredged Material[J].China Ocean Engineering,2001(1):85-96. |
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| Authors: | YING Xinya Juichiro AKIYAMAand MAO Genhai |
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| Institution: | Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China Department ofCtvil Engineering, Kyushu Institute of Technology, Kitakyushu City, Japan Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | The motion of particle clouds formed by dumping dredged material into quiescent waters is experimentally and numerically studied. In the numerical model, the particle phase is modeled by the dispersion model, and turbulence is calculated by the large eddy simulation. The governing equations, including the filtered Navier-Stokes equations and mass transport equation, are solved based on the operator-splitting algorithm and an implicit cubic spline interpolation scheme. The eddy viscosity is evaluated by the modified Smagorinsky model including the buoyancy term. Comparisons of main flow characteristics, including shape, size, average density excess, moving speed and the amount of particles deposited on the bed, between experimental and computational results show that the numerical model well predicts the motion of the cloud from the falling to spreading stage. The effects of silt-fence on the motion of the particle cloud are also investigated. |
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| Keywords: | particle cloud large eddy simulation Smagorinsky model fluid-particle flow |
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