Blar i UiS Brage på forfatter "Myrhaug, Dag"
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Assessment of shallow water random wave-induced scour at the trunk section of breakwaters using deep water wind and wave conditions
Myrhaug, Dag; Ong, Muk Chen (Peer reviewed; Journal article, 2020)This article provides a simple analytical method giving estimates of random wave-induced scour at the trunk section of vertical-wall and rubble-mound breakwaters in shallow water from deep water wind and wave conditions. ... -
CFD investigation on scour beneath different configurations of piggyback pipelines under steady current flow
Fraga, Vinicius Serta; Yin, Guang; Ong, Muk Chen; Myrhaug, Dag (Peer reviewed; Journal article, 2022)Scour beneath piggyback pipelines laid on a sandy seabed is numerically investigated by solving two-dimensional (2D) Unsteady Reynolds-averaged Navier-Stokes (URANS) equations. The fluid flow and the sediment transport are ... -
Joint description of waves and currents applied in a simplified load case
Bruserud, Kjersti; Haver, Sverre; Myrhaug, Dag (Peer reviewed; Journal article, 2018-03)In order to perform a more accurate analysis of marine structures, joint probability distributions of different metocean parameters have received an increasing interest during the last decade, facilitated by improved ... -
Large Eddy simulations of flow around tandem circular cylinders in the vicinity of a plane wall
Abrahamsen-Prsic, Mia; Ong, Muk Chen; Pettersen, Bjørnar; Myrhaug, Dag (Peer reviewed; Journal article, 2018)In order to investigate the three-dimensional flow around free-spanning, tandem marine pipelines, Large Eddy Simulations (LES) with Smagorinsky subgrid scale model are performed using the open-source code OpenFOAM. Two ... -
Note on estimating bed shear stress caused by breaking random waves
Myrhaug, Dag; Ong, Muk Chen (Peer reviewed; Journal article, 2021-04)This note presents a method of how the bed shear stress caused by breaking random waves on slopes can be estimated. This is obtained by adopting the Sumer et al. (2013) bed shear stress formula due to spilling and plunging ... -
Numerical investigation of scour beneath pipelines subjected to an oscillatory flow condition
Huang, Jun; Yin, Guang; Ong, Muk Chen; Myrhaug, Dag; Jia, Xu (Peer reviewed; Journal article, 2021-10)The present study carries out two-dimensional numerical simulations to investigate scour beneath a single pipeline and piggyback pipelines subjected to an oscillatory flow condition at a Keulegan–Carpenter (KC) number of ... -
Simulated wind-generated inertial oscillations compared to current measurements in the northern North Sea
Bruserud, Kjersti; Haver, Sverre; Myrhaug, Dag (Journal article, 2018-06)Measured current speed data show that episodes of wind-generated inertial oscillations dominate the current conditions in parts of the northern North Sea. In order to acquire current data of sufficient duration for robust ... -
Time scale for scour beneath pipelines due to long-crested and short-crested nonlinear random waves plus current
Myrhaug, Dag; Ong, Muk Chen (Peer reviewed; Journal article, 2021)This article derives the time scale of pipeline scour caused by 2D (long-crested) and 3D (short-crested) nonlinear irregular waves and current for wave-dominant flow. The motivation is to provide a simple engineering tool ...