Browsing Studentoppgaver (TN-IKM / TN-IMBM) by Author "Ong, Muk Chen"
Now showing items 21-35 of 35
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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 Simulation of Flow around Subsea Covers at High Reynolds Numbers
Zhang, Yanni (Masteroppgave/UIS-TN-IKBM/2019;, Master thesis, 2020-01-15)Glass Reinforced Plastic (GRP) covers are widely used to protect the subsea equipment from external damage. In this work, numerical simulations of a fully developed turbulent boundary layer flow over square and trapezoidal ... -
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 ... -
Numerical Simulations of Turbulent Flow through Piping Systems
Jurga, Agata (Master thesis, 2022)Piping systems have a wide range of applications across many different industries. Pipelines are essential infrastructure in the offshore oil & gas installations. One of the key challenges when operating complicated piping ... -
Numerical Study of Oxygen Transport in Aquaculture Tanks With Different Geometries
Pollen, Trygve (Master thesis, 2022)The transport of dissolved oxygen concentration in water for aquaculture is a core parameter affecting the quality of yielded fish. An emerging shift from offshore to land-based aquaculture presents advan- tages to marine ... -
Numerical study of two typical Norwegian gravity-based fish cages with different cage shapes and weights
Mjåtveit, Magnus Aske (Master thesis, 2021)Fish cages usually have net deformation in marine environments, and this deformation can reduce the cultivation volume of the fish cage and thus reduce the fish welfare. Hence, it is necessary to understand the structural ... -
Numerical Study on Offshore Lifting Operations of a Subsea Spool
Parra, Carlos Andres (Masteroppgave/UIS-TN-IMBM/2018;, Master thesis, 2018-06)Within the scope of marine operations, offshore lifting operations present significant challenges due to the instability and harshness of environmental conditions. Therefore, lifting operations become expensive and risky. ... -
Numerical study on structural responses of gravity-based fish cages
Sim, Jaesub (Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2020)The location of a fish farm is moving towards more exposed locations due to spatial and environmental concerns. As the fish farm moves to open seas, the structure of the fish farm would undergo increased environmental loads ... -
Numerical study on thermal effects in an electric subsea robotic actuator
Fjetland, Kotryna Bedrovaite (Masteroppgave/UIS-TN-IMBM/2020;, Master thesis, 2020-07-07)A remotely operated vehicle (ROV) is equipped with two robotic manipulators. Current manipulators are hydraulically actuated. The industry has uncovered the potential in replacing hydraulic-based technology with its ... -
On-bottom Stability of a Subsea pipeline in Irregular Waves
Li, Lanjing (Masteroppgave/UIS-TN-IKM/2016;, Master thesis, 2016-06)Pipelines in a subsea environment are exposed to a very complex system of hydrodynamic reaction. The on-bottom stability has long been a important study for offshore practice. The soil types, wave conditions as well as ... -
Optimisation of Suspended Inter-array Power Cable Configurations for Floating Offshore Wind Turbines
Izwan, Ahmad (Master thesis, 2022)Floating offshore wind turbines (FOWTs) have been demonstrated to be highly promising for effectively harnessing energy from offshore wind in deeper water areas where installing bottom-fixed offshore wind turbines is not ... -
Reduced Order Models for Hydrodynamic Analysis of Pipelines based on Modal Analysis and Machine Learning
Nazvanova, Anastasiia (Master thesis, 2023)Bluff bodies have extensive implementation in engineering. For instance, marine risers, jumpers, umbilicals, and bundle flowlines are the examples of the circular bluff bodies which are used in the field of offshore ... -
Study of lifting operation of a tripod foundation for offshore wind turbine
Zhu, Hui (Master thesis, 2017-06)Marine lifting operations play a key role in the installation of turbines and bottom-fixed foundations. Offshroe installations of the bottom-fixed foundations, tripod foundation in this study, are costly and risky due to ... -
Vortex Induced Vibration (VIV) response and multi-axial fatigue assessment of a subsea rigid jumper
Kapoor, Kunal (Masteroppgave/UIS-TN-IMBM/2018;, Master thesis, 2018-06-15)Vortex induced vibrations (VIV) prediction is of interest for subsea jumpers or spools that are exposed to significant current/wave conditions near the seabed. The VIV induces cyclic flexural and torsional stresses in ...