Blar i UiS Brage på forfatter "Ong, Muk Chen"
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Experimental study on parametric configurations of artificially downwelling aerations in stratified water
Tian, Xiaoqing; Wang, Zhenlin; Zhang, Baofeng; Zeng, Ran; Wang, Jiyong; Ong, Muk Chen; Yang, Junyi (Peer reviewed; Journal article, 2023)Downwelling aeration has become a widely applied approach to cope with the water eutrophication in stratified reservoirs, rivers and lakes. The aeration parameters involving flow rate, flow locations and working periodicity ... -
Exploring of the incompatibility of marine residual fuel: A case study using machine learning methods
Sultanbekov, Radel; Beloglazov, Ilia; Islamov, Shamil; Ong, Muk Chen (Peer reviewed; Journal article, 2021-12)Providing quality fuel to ships with reduced SOx content is a priority task. Marine residual fuels are one of the main sources of atmospheric pollution during the operation of ships and sea tankers. Hence, the International ... -
Fatigue Analysis of Inter-Array Power Cables between Two Floating Offshore Wind Turbines Including a Simplified Method to Estimate Stress Factors
Beier, Dennis; Schnepf, Anja; Van Steel, Sean; Ye, Naiquan; Ong, Muk Chen (Peer reviewed; Journal article, 2023-06)The use of floating offshore wind farms for electrical energy supply is expected to rise significantly over the coming years. Suspended inter-array power cables are a new design to connect floating offshore wind turbines ... -
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 ... -
Flow around two elastically-mounted cylinders with different diameters in tandem and staggered configurations in the subcritical Reynolds number regime
Janocha, Marek Jan; Ong, Muk Chen; Nystrøm, Per Richard; Tu, Zhenguo; Endal, Geir; Stokholm, Halvor (Peer reviewed; Journal article, 2021)Flow around two cylinders with different diameters undergoing Flow-Induced Vibrations (FIV) in the subcritical flow regime is investigated using two-dimensional Unsteady Reynolds Averaged Navier-Stokes (URANS) approach. ... -
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 ... -
Global analysis of floating offshore wind turbines with shared mooring system
Munir, Hammad; Lee, Chern Fong; Ong, Muk Chen (Peer reviewed; Journal article, 2021)Floating wind turbines (FWTs) with shared mooring systems can be one of the most cost- effective solutions in reducing mooring costs. First, the static configuration of a shared line is estimated using the elastic catenary ... -
Global analysis of floating offshore wind turbines with shared mooring system.
Munir, Hammad (Master thesis, 2022)Wind energy harvesting has increased considerably in recent decades across the world. Over the years, wind farms have gradually extended further into the sea to make use of the greater potential of wind resources in deeper ... -
Improved delayed detached eddy simulations of flow past an autonomous underwater helicopter
Wang, Zhikun; Yin, Guang; Ong, Muk Chen; Chen, Ying (Peer reviewed; Journal article, 2023)To achieve good control of an autonomous underwater helicopter (AUH), it is of great significance to study its hydrodynamic quantities. In the present study, hydrodynamic analysis of a disk-shaped AUH is carried out by ... -
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 ... -
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 ... -
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, 2018) -
Large eddy simulations of flow past an inclined circular cylinder: Insights into the three-dimensional effect
Li, Gen; Li, Wenhua; Janocha, Marek Jan; Yin, Guang; Ong, Muk Chen (Peer reviewed; Journal article, 2023)The flow past an inclined cylinder is simulated using large eddy simulations to study the three-dimensional wake flow effects on the forces on the cylinder at Re = 3900. Four inclination angles of α = 0°, 30°, 45°, and 60° ... -
Linear quadratic regulator optimal control of two-rotor wind turbine mounted on spar-type floating platform
El Beshbichi, Omar; Xing, Yihan; Ong, Muk Chen (Peer reviewed; Journal article, 2022)Interest is steadily growing for multi-rotor wind turbine concepts. This type of wind turbine offers a practical solution for scaling issues of large wind turbine components and for the reduction of costs associated with ... -
Mooring designs for a combined wind and wave energy system in intermediate water depth
Fjermedal, Sindre (Master thesis, 2023)Over the past few decades, the renewable energy industry has expanded offshore in response to the growing demand for clean and sustainable energy. Larger structures with greater power output and less visual disturbance ... -
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 analysis of a vessel-shaped offshore fish farm
Li, Lin; Jiang, Zhiyu; Høiland, Andreas Vangdal; Ong, Muk Chen (Peer reviewed; Journal article, 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 Analysis of the Effect of Offshore Turbulent Wind Inflow on the Response of a Spar Wind Turbine
Putri, Rieska Mawarni; Obhrai, Charlotte; Jakobsen, Jasna Bogunovic; Ong, Muk Chen (Peer reviewed; Journal article, 2020)Turbulent wind at offshore sites is known as the main cause for fatigue on offshore wind turbine components. Numerical simulations are commonly used to predict the loads and motions of floating offshore wind turbines; ...