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Blar i NTNU Open på forfatter "Ong, Muk Chen"

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Viser treff 1-20 av 34

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    • A rational approach to seepage flow effects on bottom friction beneath random waves 

      Myrhaug, Dag; Holmedal, Lars Erik; Ong, Muk Chen (Journal article, 2014)
      The bottom friction beneath random waves is predicted taking into account the effect of seepage flow. This is achieved by using wave friction factors for rough turbulent, smooth turbulent and laminar flow valid for regular ...
    • Applications of a Standard HighReynolds Number k-εModeland a Stochastic Scour PredictionModel for Marine Structures 

      Ong, Muk Chen (Doktoravhandlinger ved NTNU, 1503-8181; 2009:71, Doctoral thesis, 2009)
    • Assessment of performance enhancement of a semi-submersible vertical axis wind turbine with an optimized Darrieus rotor 

      Cheng, Zhengshun; Wang, Kai; Ong, Muk Chen (Journal article; Peer reviewed, 2018)
      Increasing efforts are currently being devoted to develop floating vertical axis wind turbines (VAWTs), due to their potential to reduce the cost-of-energy. Optimization of rotors is favorable to increase the power capture ...
    • 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. ...
    • Dynamic responses of a jacket-type offshore wind turbine using decoupled and coupled models 

      Ong, Muk Chen; Bachynski, Erin Elizabeth; Økland, Ole David; Passano, Elizabeth Anne (Chapter, 2014)
      This paper presents numerical studies of the dynamic responses of a jacket-type offshore wind turbine using both decoupled and coupled models. In the decoupled (hydroelastic) model, the wind load is included through ...
    • Effects of soil profile variation and scour on structural response of an offshore monopile wind turbine 

      Li, Hui; Ong, Muk Chen; Leira, Bernt Johan; Myrhaug, Dag (Journal article, 2018)
      This paper presents an engineering approach to study the effects of soil profile variation and scour on structural response of an offshore monopile wind turbine. A wind-wave model for finite water depth is proposed to ...
    • Large Eddy Simulations of flow around a circular cylinder close to a flat seabed 

      Abrahamsen-Prsic, Mia; Ong, Muk Chen; Pettersen, Bjørnar; Myrhaug, Dag (Journal article, 2016)
      Large Eddy Simulations (LES) with Smagorinsky subgrid scale model are used to study the turbulent flow and wake dynamics behind a circular cylinder close to a horizontal, plane wall at subcritical Reynolds number. The focus ...
    • Large Eddy Simulations of Flow around a Circular Cylinder in the Vicinity of a Wall at Reynold Number of 13100 

      Abrahamsen-Prsic, Mia; Ong, Muk Chen; Pettersen, Bjørnar; Myrhaug, Dag (Chapter, 2013)
      The flow around a circular cylinder in the vicinity of a rigid wall at Reynolds number 13100 is simulated using Large Eddy Simulations (LES) with Smagorinsky subgrid scale model. The main purpose of the present work is to ...
    • Large Eddy Simulations of flow around a smooth circular cylinder in a uniform current in the subcritical flow regime 

      Abrahamsen-Prsic, Mia; Ong, Muk Chen; Pettersen, Bjørnar; Myrhaug, Dag (Journal article; Peer reviewed, 2014)
      Three-dimensional flow around a circular cylinder in a steady, uniform current at subcritical Reynolds numbers (Re) is investigated. The flow is simulated using Large Eddy Simulations (LES) with Smagorinsky subgrid scale ...
    • 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 (Journal article; Peer reviewed, 2018)
      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 circular ...
    • Large Eddy Simulations of Flow Around Tandem Cylinders Close to a Horizontal Wall 

      Abrahamsen-Prsic, Mia; Ong, Muk Chen; Pettersen, Bjørnar; Myrhaug, Dag (Journal article; Peer reviewed, 2015)
      This study focuses on the numerical simulations of the flow around tandem cylinders placed in the vicinity of a rigid, horizontal plane wall. The cylinders are immersed close to a plane wall in a steady current with a ...
    • Large Eddy Simulations of flow around two circular cylinders in tandem in the vicinity of a plane wall at small gap ratios 

      Li, Zhong; Abrahamsen-Prsic, Mia; Ong, Muk Chen; Khoo, Boo Cheong (Journal article; Peer reviewed, 2018)
      Large Eddy Simulations (LES) with Smagorinsky subgrid scale model have been performed for the flow past two circular cylinders in tandem placed in the vicinity of a horizontal plane wall at very small gap ratios, namely ...
    • Large Eddy Simulations of Flow Past Two Pipelines in Tandem in Close Proximity to the Seabed 

      li, zhong; Abrahamsen-Prsic, Mia; Ong, Muk Chen; khoo, Boo Cheong (Chapter, 2017)
      Three-dimensional Large Eddy Simulations (LES) with Smagorinsky subgrid scale model have been performed for the flow past two free-spanning marine pipelines in tandem placed in the vicinity of a plane wall at a very small ...
    • Large Eddy Simulations of Three-Dimensional Flow Around a Pipeline in a Uniform Current 

      Prsic, Mia; Ong, Muk Chen; Pettersen, Bjørnar; Myrhaug, Dag (Chapter; Peer reviewed, 2012)
      Three-dimensional (3D) modeling of the flow around a circular cylinder in a steady, uniform current subjected to low and intermediate Reynolds numbers (Re) is considered. Large eddy simulations (LES) are used to simulate ...
    • LES of Flow Around Tandem Cylinders Close to a Horizontal Wall 

      Abrahamsen-Prsic, Mia; Ong, Muk Chen; Pettersen, Bjørnar; Myrhaug, Dag (Chapter, 2015)
      This study focuses on the numerical simulations of the flow around tandem cylinders placed in the vicinity of a rigid, horizontal, plane wall. The cylinders are immersed close to a plane wall in a steady current with a ...
    • Note on estimating bed shear stress caused by breaking random waves 

      Myrhaug, Dag; Ong, Muk Chen (Peer reviewed; Journal article, 2021)
      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 analysis of a vessel- shaped offshore fish farm 

      Li, Lin; Jiang, Zhiyu; Høiland, Andreas Vangdal; Ong, Muk Chen (Journal article; Peer reviewed, 2018)
      The aquaculture industry is aiming to move fish farms from nearshore areas to open seas because of many attractive advantages in the open water. However, one major challenge is to design the structure to withstand the ...
    • 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)
      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 ...
    • Numerical Simulation of Boundary Layer Flow Around Simplified Subsea Structures 

      Nymo, Dennis Alexander (Master thesis, 2015)
      Numerical simulations of boundary layer flow over simplified subsea structures on a flat seabed have been performed. A two-dimensional RANS method with a standard high Reynolds number k-ε turbulence model have been applied. ...
    • Numerical Simulation of Flow Around Remotely Operated Vehicle (ROV) 

      Skorpa, Steinar (Master thesis, 2012)
      Computational Fluid Dynamics (CFD) have been applied for numerical simulations of the flow around simplified shapes of a Remotely Operated Vehicle (ROV). The simulations have been carried out at Re = 850 000, which coincides ...

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