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Browsing UiS Brage by Author "Ong, Muk Chen"

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Now showing items 1-20 of 32

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    • Analysis of ROV thrusters and small marine propellers at specific rotational speeds 

      Fotland, Kristian (Masteroppgave/UIS-TN-IMBM/2018;, Master thesis, 2018)
      Thrusters are vital for the functionalities of remotely operated vehicles (ROVs). The development of thruster design is a trade-off between cost, thrust force, physical weight and size. Furthermore, it is known that problems ...
    • CFD investigation of flow through an orifice inside a pipe 

      Nitter, Bjørnar (Masteroppgave/UIS-TN-IMBM/2019;, Master thesis, 2019-06-14)
      Flow measurement is found in a large variety of industries and for different types of fluids. Orifice flow meters are widely used for measuring the flow rate in pipelines due to its small size in the piping system and ...
    • CFD Simulations of Vortex-Induced Vibrations of a Subsea Pipeline Near a Horizontal Plane Wall 

      Janocha, Marek Jan (Masteroppgave/UIS-TN-IMBM/2018;, Master thesis, 2018-06)
      Subsea pipelines, when exposed to free spans, can experience vortex-induced vibrations. This phenomenon was described as a resonance condition occurring when the vortex shedding frequency and the natural frequency of a ...
    • Computational Fluid Dynamics (CFD) Investigations of Flow-Induced Vibrations of Two Rigidly Coupled Cylinders at High Reynolds Number 

      Pires Vieira Serta, Clarissa (Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2020)
      Two degree-of-freedom (2-DoF) flow-induced vibrations (FIV) of a single cylinder and two rigidly coupled cylinders are numerically investigated at the Reynolds number of 3.6 × 10^6. Two-dimensional (2D) Unsteady ...
    • Computational Fluid Dynamics (CFD) simulation of two-dimensional(2D) cross sectional flow around twin-box girder bridge 

      Jeong, Wonmin (Masteroppgave/UIS-TN-IKM/2017;, Master thesis, 2017-06-15)
      Flow around a twin-box bridge with a fixed spacing between the decks has been investigated using the two dimensional (2D) Unsteady Reynolds-Averaged Navier–Stokes (URANS) equations with the k–ω Shear Stress Transport (SST) ...
    • Design, Testing and Analysis of a New Pipeline Recovery Tool 

      Eriksson, Nicolai Bull (Masteroppgave/UIS-TN-IMBM/2019;, Master thesis, 2019-06-15)
      Pipeline Recovery Tools (PRT’s) are used in decommissioning and recovery of subsea pipelines. The PRT often use a mechanical system to insert and lock itself onto the subsea pipeline. This thesis examines a unique connection ...
    • Dynamic Analysis of a Floating Fish Cage with Feeding Systems 

      Bruset, Mathias (Masteroppgave/UIS-TN-IMBM/2019;, Master thesis, 2019-06)
      Aquaculture is one of the fastest growing industries in Norway, and one of the fastest growing food production industries in the world. Limited access to available locations along the coast is gradually forcing aquacultural ...
    • Dynamic Analysis of a Vessel-shaped Fish Farm for Open Sea 

      Høiland, Andreas Vangdal (Masteroppgave/UIS-TN-IKM/2017;, Master thesis, 2017-06-15)
      In recent years, aquaculture has been the fastest-growing animal food producing industry in the world. However, the absence of suitable production areas might potentially become the most limiting factor for future production ...
    • Dynamic analysis of flexible gravity-based fish cages under accidental failures in the mooring system 

      Dewan, Pulkit (Masteroppgave/UIS-TN-IMBM/2019;, Master thesis, 2019-06-15)
      A growing population needs an increasing amount of high-protein and nutritious food. Having acknowledged that, there is a substantial increase in seafood production in the world today. Due to spatial and environmental ...
    • Dynamic analysis of gravity based fish cage 

      Chang, Ying (Masteroppgave/UIS-TN-IKM/2017;, Master thesis, 2017-07-06)
      With the development of economy and growth of population, we are constantly facing the challenge of decreasing fish population and increasing needs in the fish market. Aquaculture is a practical way to fulfill this demand. ...
    • Feasibility study and dynamic analysis of floating vertical axis wind turbines in multi-applications 

      Wen, Ting Rui (Masteroppgave/UIS-TN-IMBM/2018;, Master thesis, 2018-06-15)
      In the past decades, the global wind energy has rapidly grown. Greater potential of wind recourses is explored in the deeper sea; hence, wind farms have progressively moved toward the deep water over the years. Floating ...
    • Finite Element Models for Integrity Assessment of Flexible Riser with Damaged Tensile Wires 

      Haugen, Mathias O. M. (Masteroppgave/UIS-TN-IKM/2017;, Master thesis, 2017-06)
      Many of the flexible risers in service do not meet their documented service life. A common failure mode is the rupture of the abrasive external layer which, in itself, is not critical, but seawater ingress may corrode ...
    • Geometry Optimization of Glass Reinforced Plastic (GRP) Subsea Protection Covers 

      Tauqeer, Muhammad Ahmad (Masteroppgave/UIS-TN-IKM/2016;, Master thesis, 2016-06)
      Subsea pipelines are exposed to fishing activity loads and drop-object impacts. Protection covers are used to protect the pipelines from these loads and are manufactured from Glass Reinforced Plastics (GRP) for high strength ...
    • Influence of linear springing on the fatigue damage of ultra large ore carriers 

      Li, Hui; Wang, Di; Liu, Ning; Zhou, Xueqian; Ong, Muk Chen (Journal article; Peer reviewed, 2018-05)
      Springing occurs more frequently to ultra large ships, as their natural frequencies are relatively low and approaches the spectral peak of the wave energy spectrum in certain sea states. Springing is a resonance phenomenon ...
    • The influence of terrain on the mean wind flow characteristics in a fjord 

      Cheynet, Etienne; Liu, Shengnan; Ong, Muk Chen; Jakobsen, Jasna Bogunovic; Snæbjörnsson, Jonas Thor; gatin, Inno (Peer reviewed; Journal article, 2020)
      Flow conditions in complex terrains such as fjords are highly three-dimensional and thus not properly captured by the wind flow models developed for homogenous terrains. In the present study, we explore the potential of ...
    • Numerical Analysis of a Semi-submersible Fish Farm for Exposed Seas 

      Du, Bin (Masteroppgave/UIS-TN-IKM/2017;, Master thesis, 2017-06-15)
      Due to continuously increasing demand for sea food and the limited number of sheltered locations suitable for fish farming, there has been a push to develop new solutions that can be used outside the sheltered locations ...
    • Numerical Investigation of Vortex-Induced Vibrations of a Flexible Riser with Staggered Buoyancy Elements 

      Wu, Jie; Lekkala, Malakonda K. Reddy; Ong, Muk Chen (Peer reviewed; Journal article, 2020-01)
      This paper presents a numerical algorithm used together with a Finite-Element based Vortex-Induced Vibration (VIV) prediction software VIVANA to obtain a hydrodynamic force coefficient database based on response measurements ...
    • Numerical Simulation of Flow Around Subsea Covers at high Reynolds Numbers 

      Andersen, Martin (Masteroppgave/UIS-TN-IMBM/2019;, Master thesis, 2019-06-15)
      The present study investigates turbulent flow over square and trapezoidal wall-mounted subsea covers in single and tandem configuration. The structures under investigation in the single configuration are subjected to a ...
    • Numerical Simulations of Flow Over Bottom-Mounted Structures at High Reynolds Number 

      Serta Fraga, Vinicius (Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2019-06)
      A common challenge in on-bottom stability design is to select accurate hydrodynamic quantities, such as drag and lift coefficients, to compute the forces on structures subject to fluid flow. The objective of the present ...
    • Numerical Simulations of Near-Wall Vortex-Induced Vibrations of two Circular Cylinders in Tandem 

      Eie, Kjartan (Masteroppgave/UIS-TN-IMBM/2019;, Master thesis, 2019-06-15)
      Free-spanning subsea pipelines may experience vortex-induced vibrations (VIV) when exposed to fluid flow. These resonant motions can cause fatigue-related problems and in some cases failure of the pipe. A common configuration ...

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