Simulation of underwater concrete movement in flowing water using DEM-CFD coupling method

With the construction of offshore structures and underwater projects, increasing requirements are put forward for underwater concrete (UWC). Based on the DEM-CFD coupling method, this study simulates the diffusion and movement of UWC in flowing water, and discusses the effects of concrete properties, pouring velocity and water flow velocity on UWC pouring. According to the simulation results, the mortar at the top and edge of UWC is easily washed away by flowing water in the process of pouring, resulting in the loss of UWC. Additionally, improving concrete cohesiveness, increasing concrete pouring velocity and decreasing water flow velocity could significantly reduce the loss rate of UWC.