Numerical Study of Wave- and Current-Induced Oscillatory Seabed Response near a Fully Buried Subsea Pipeline

To investigate the wave- and current-induced seabed response near a fully buried subsea pipeline, two-dimensional coupled model for fluid-seabed-pipeline interaction (FSPI-2D) is developed within framework of COMSOL multiphysics. Different from previous studies, both wave-current nonlinear pipeline-soil contacts are considered in present model. In this paper, Biot’s consolidation mode used to govern fluid-induced response, combined Reynolds averaged Navier–Stokes (RANS) equation with k-ε turbulence employed simulate fluid propagation. Meanwhile, pipeline treated as linear elasticity. Firstly, effectiveness new verified by laboratory experiments reports. Then, numerical examine effects pipeline-seabed characteristics on around structure. Finally, momentary liquefaction studied based 2D