Modelling local scour near structures with combined mesh movement and mesh optimisation

摘要: Abstract This paper develops a new implementation coupling optimisation-based anisotropic mesh adaptivity algorithms to moving numerical scour model, considering both turbulent suspended and bedload sediment transport. The significant flexibility over structure resolution, in space time, that the of these approaches provides makes this framework highly suitable for resolving individual marine scales with larger scale ocean dynamics. use optimisation addresses issue poor quality and/or inappropriate resolution have compromised existing modelling apply movement strategies alone, especially case extreme scour. Discontinuous Galerkin finite element-based discretisation methods Reynolds Averaged Navier–Stokes-based approach are used hydrodynamic fluid flow. In work model is verified two dimensions current-dominated near horizontal pipeline. Combined adaptive found maintain validity response morphological bed evolution changes, even where it severely constrained by nearby structures.