Silt motion simulation using finite volume particle method

27th IAHR Symposium on Hydraulic Machinery and Systems

Jahanbakhsh, E.^1 ; Vessaz, C.^1 ; Avellan, F.^1

EPFL Laboratory for Hydraulic Machines, Av. de Cour 33bis, Lausanne

1007, Switzerland^1

关键词: Finite-volume particle method;    Interaction forces;    Motion simulations;    No-slip boundary conditions;    Numerical solution;    Particle resolutions;    Single particle;    Viscous fluids;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/22/5/052015/pdf
DOI  :  10.1088/1755-1315/22/5/052015

来源: IOP

【 摘 要 】

In this paper, we present a 3-D FVPM which features rectangular top-hat kernels. With this method, interaction vectors are computed exactly and efficiently. We introduce a new method to enforce the no-slip boundary condition. With this boundary enforcement, the interaction forces between fluid and wall are computed accurately. We employ the boundary force to predict the motion of rigid spherical silt particles inside the fluid. To validate the model, we simulate the 2-D sedimentation of a single particle in viscous fluid tank and compare results with benchmark data. The particle resolution is verified by convergence study. We also simulate the sedimentation of two particles exhibiting drafting, kissing and tumbling phenomena in 2-D and 3-D. We compare the results with other numerical solutions.