2021 Volume 77 Issue 2 Pages I_295-I_300
In this paper, numerical simulations of flow and local scour around a cylinder were carried out using various turbulence models in the RANS in order to clarify the turbulence model which can reproduce the flow and the local scour accurately. From the simulations of flows in a fixed-bed experiment, it was found that the SST k-ω turbulence model is the most suitable for the reproduction of the phenomena, and at least over ten-odd meshes for the resolution of a cylinder are required to reproduce the flow accurately. Moreover, from the simulations of local scour in a movable-bed experiment, it was shown that the difference between the RNG k-ε and the SST k-ω turbulence model or the effect of the non-equilibrium bed load transport are not clearly appeared in the numerical results under the target experimental condition.
