Browsing UiS Brage by Author "Ong, Muk Chen"
Now showing items 1-20 of 126
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A study of laminar particle flow through elbow pipe
Vistnes, Henrik Norland (Master thesis, 2024) -
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 ... -
Analysis of spar and semi-submersible floating wind concepts with respect to human exposure to motion during maintenance operations
Kaptan, Mert; Skaare, Bjørn; Jiang, Zhiyu; Ong, Muk Chen (Peer reviewed; Journal article, 2022)Floating offshore wind turbines (FOWTs) are expected to experience onsite maintenances and inspections during their lifetimes. To carry out offshore maintenance activities, a crew will be transferred to an FOWT and spend ... -
An Approach to Determine Optimal Bow Configuration of Polar Ships under Combined Ice and Calm-Water Conditions
Li, Hu; Feng, Yan; Ong, Muk Chen; Zhao, Xin; Zhou, Li (Peer reviewed; Journal article, 2021-06)Selecting an optimal bow configuration is critical to the preliminary design of polar ships. This paper proposes an approach to determine the optimal bow of polar ships based on present numerical simulation and available ... -
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. ... -
Ballast Control Analysis of a Floating Dock under Accidental Conditions
García Conde, Alejandro (Master thesis, 2023)Floating docks play a critical role in the maintenance and inspection of submerged sections of ships. However, their operational complexity requires the expertise of a skilled dock master to develop an optimal ballast plan ... -
Baseline design of a subsea shuttle tanker system for liquid carbon dioxide transportation
Ma, Yucong; Xing, Yihan; Ong, Muk Chen; Hemmingsen, Tor (Peer reviewed; Journal article, 2021-10)This paper presents the baseline design of a 34,000-tonne subsea shuttle tanker (SST). The SST is proposed as an alternative to subsea pipelines and surface tankers for the transportation of liquid carbon dioxide (CO2) ... -
CFD investigation of blind-tee effects on flow mixing mechanism in subsea pipelines
Han, Fenghui; Liu, Yuxiang; Ong, Muk Chen; Yin, Guang; Li, Wenhua; Wang, Zhe (Peer reviewed; Journal article, 2022)Blind tees are widely used in subsea pipelines to enhance the mixing conditions of oil and gas products, but their structural design still relies on experience. In this paper, a series of numerical investigations have been ... -
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 investigation of fluid flow within elbow pipes
Taibi, Ridoan (Master thesis, 2021)Elbow pipes are crucial parts of many fluid transport systems, including ones used in the oil and gas industry. The curved shape of such pipes induces centrifugal forces on the internal flow, ultimately affecting the flow ... -
CFD Investigation on Hydrodynamic Resistance of a Novel Subsea Shuttle Tanker
Xing, Yihan; Janocha, Marek Jan; Yin, Guang; Ong, Muk Chen (Peer reviewed; Journal article, 2021-12)The Subsea Shuttle Tanker (SST) was proposed by Equinor as an alternative to subsea pipelines and surface tankers for the transportation of liquid carbon dioxide (CO2) from existing offshore/land facilities to marginal ... -
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 ... -
CFD investigations of scour beneath a submarine pipeline with the effect of upward seepage
Li, Yuzhu; Ong, Muk Chen; Fuhrman, David R. (Peer reviewed; Journal article, 2020-12)A numerical model of scour beneath subsea structures considering the effect of upward seepage in the seabed is proposed. A small seepage can cause significant changes to the hydrodynamic force on the bed surface and stability ... -
CFD Simulations of the Propagation of Free-Surface Waves Past Two Side-By-Side Fixed Squares with a Narrow Gap
Zhang, Haoyu; Liu, Shengnan; Ong, Muk Chen; Zhu, Renqing (Peer reviewed; Journal article, 2019)Two-dimensional computational fluid dynamics (CFD) simulations are carried out to investigate the gap resonance phenomenon that occurs when free-surface waves travel past twin squares in tandem. The volume of fluid method ... -
CFD simulations of violent breaking wave impacts on a vertical wall using a two-phase compressible solver
Liu, Shengnan; Gatin, Inno; Obhrai, Charlotte; Ong, Muk Chen; Jasak, Hrvoje (Peer reviewed; Journal article, 2019)Four different types of breaking wave impacts on a vertical wall are simulated using a two-dimensional two-phase Computational Fluid Dynamic (CFD) model. Air is considered as an isentropic ideal gas without solving an ... -
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 ... -
Challenges and opportunities of marine propulsion with alternative fuels
Chiong, Meng-Choung; Kang, Hooi-Siang; Shaharuddin, Nik Mohd Ridzuan; Mat, Shabudin; Quen, Lee Kee; Ten, Ki-Hong; Ong, Muk Chen (Peer reviewed; Journal article, 2021-06)The increasingly stringent shipping emissions regulations and global decarbonisation movement have prompted the adoption of alternative fuels in the shipping industry. This review presents the performance results and ... -
Comparative dynamic analysis of semi-submersible floating two-rotor wind turbine on catenary and taut mooring in shallow water depth
Tavares, Vitor De Santis (Master thesis, 2024)A floating offshore wind turbine (FOWT) comprising a semi-submersible platform and a two-rotor wind turbine installed in a water depth of 50 m is proposed in this thesis. The rotor used is the 5 MW Reference Wind Turbine ... -
Comparative dynamic analysis of two-rotor wind turbine on spar-type, semi-submersible, and tension-leg floating platforms
El Beshbichi, Omar; Xing, Yihan; Ong, Muk Chen (Peer reviewed; Journal article, 2022)Multi-rotor floating offshore wind turbines have been recently proposed as an innovative technology to further reduce the cost of offshore wind energy. Even though examples of commercial prototypes are present, the literature ... -
Comparative study of circular and square gravity-based fish cages with different dimensions under pure current conditions
Mjåtveit, Magnus Aske; Cheng, Hui; Ong, Muk Chen; Lee, Jihoon (Peer reviewed; Journal article, 2021-12)Two typical gravity-based fish cages with circular and square shapes are modeled in the present study to compare their cage deformations, cultivation volumes and drag forces under different pure current conditions. Two hy ...