Simulation of open channel flows by an explicit incompressible mesh-free method  

作　　者：Zhi-jian Huang Ti-bing Xu David Z.Zhu Song-da Zhang 

机构地区：[1]School of Civil and Environmental Engineering and Geography Science,Ningbo University,Ningbo,315211,China [2]Department of Civil and Environmental Engineering,University of Alberta,Alberta,Canada [3]Ningbo River Management Center,Ningbo,315303,China

出　　处：《Journal of Hydrodynamics》2023年第2期287-298,共12页水动力学研究与进展B辑（英文版）

基　　金：This work was supported by the Key Research and Development Program of Zhejiang Province(Grant No.2020C03082);the Visiting Researcher Fund Program of State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University(Grant No.2021HLG01).

摘　　要：In this study,to simulate open channel flows,an explicit incompressible mesh-free method is employed in which the pressure field is obtained by explicitly solving the pressure Poisson equation.To capture the velocity information in open channel flows,the source term in the pressure Poisson equation is modified while the spatial discretization of gradient and Laplacian models is based on the moving particle semi-implicit(MPS)method.The inflow boundary condition is treated by injecting fluid particles into the domain according to the inlet discharge,and the outflow condition is handled by prescribing the pressure distribution and removing the fluid particles beyond the domain.The explicit incompressible mesh-free method is then used to simulate open channel flows,including weir flow,hydraulic jump,and flow over an obstacle.In the simulations,velocity distribution and flow pattern are examined.The simulated results are compared to available experimental measurements and other numerical results.There is a good agreement between the simulated results and the experimental measurements.It shows that the explicit incompressible mesh-free method can reproduce the flow characteristics in the open channel flows.

关 键 词：Mesh-free method explicit scheme weir flow hydraulic jump velocity distribution 

分 类 号：O17[理学—数学]