Blar i NTNU Open på forfatter "Bihs, Hans"
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Energy transfer due to shoaling and decomposition of breaking and non-breaking waves over a submerged bar
Kamath, Arun; Alagan Chella, Mayilvahanan; Bihs, Hans; Arntsen, Øivind Asgeir (Journal article; Peer reviewed, 2017)Wave propagation over a submerged bar is simulated using the open source CFD model REEF3D with various incident wave heights to study shoaling, wave breaking features and the process of wave decomposition into higher ... -
Estimation of breaking wave properties and their interaction with a jacket structure
Aggarwal, Ankit; Bihs, Hans; Shirinov, Seimur; Myrhaug, Dag (Journal article; Peer reviewed, 2019)The numerical investigation of breaking wave interaction with jacket type offshore wind turbine substructures is quite challenging due to multiple jacket members and the complicated hydrodynamics of breaking waves around ... -
Evaluating Wave Forces on Groups of Three and Nine Cylinders using a 3D Numerical Wave Tank
Kamath, Arun; Alagan Chella, Mayilvahanan; Bihs, Hans; Arntsen, Øivind Asgeir (Journal article; Peer reviewed, 2015)The evaluation of the complex wave regime due to wave interaction with a large group of cylinders placed in proximity requires an efficient and accurate numerical model. This paper presents the application of a two-phase ... -
Experimental and numerical investigation of a moored floating structure in waves
Dempwolff, Leon-Carlos (Master thesis, 2019)Floating structures play a major role in a wide range of traditional industrial branches as well as in recently developing sectors such as renewable energies. An accurate prediction of the movement of floating structures ... -
Experimental and Numerical Investigation of Sloshing under Roll Excitation at Shallow Liquid Depths
Grotle, Erlend Liavåg; Bihs, Hans; Æsøy, Vilmar (Journal article; Peer reviewed, 2017)This paper investigates sloshing at shallow-liquid depths in a rectangular container by using experimental and numerical methods. A motion platform is used to perform a prescribed periodic rotational motion to excite the ... -
Experimental and Numerical Study of Waves Breaking Over a Submerged Three-Dimensional Bar
Kamath, Arun; Roy, Travis; Seiffert, Betsy; Bihs, Hans (Peer reviewed; Journal article, 2022)Depth-induced breaking is the major wave transformation process in coastal waters that significantly influences the wave energy that eventually reaches the coastline. Most studies of depth-induced wave breaking focus on ... -
Extreme Wave Generation, Breaking and Impact Simulations With REEF3D
Bihs, Hans; Kamath, Arun; Alagan Chella, Mayilvahanan; Arntsen, Øivind Asgeir (Chapter, 2017)An accurate description of extreme waves is necessary in order to estimate maximum wave forces on offshore structures. On several occasions freak waves have been observed in the past, some causing severe damage. In order ... -
Extreme Wave Generation, Breaking, and Impact Simulations Using Wave Packets in REEF3D
Bihs, Hans; Kamath, Arun; Alagan Chella, Mayilvahanan; Arntsen, Øivind Asgeir (Journal article; Peer reviewed, 2019)On several occasions, freak waves have been observed in the past, some causing severe damage. In order to model such extreme wave conditions, one possibility is to use focused waves of first- or second-order based on ... -
A Flexible Fully Nonlinear Potential Flow Model for Wave Propagation over the Complex Topography of the Norwegian Coast
Wang, Weizhi; Pakozdi, Csaba; Kamath, Arun; Fouques, Sebastien; Bihs, Hans (Peer reviewed; Journal article, 2022)Coastal wave propagation and transformation are complicated due to the significant variations of water depth and irregular coastlines, which are typically present at the Norwegian fjords. A potential flow model provides ... -
Floating offshore wind and mooring systems modelling using CFD
Malmei, Vilde (Master thesis, 2023)Flytende havvind er avgjørende for overgangen til fornybar energi og for å oppnå netto null utslipp. Siden disse turbinene kan plasseres på dypere havområder, kan de også produsere mer kraft på grunn av sterkere og mer ... -
Focused Plunging Breaking Waves Impact on Cylinder Group in Deep Water
Cui, Ting; Kamath, Arun; Wang, Weizhi; Yuan, Lihao; Han, Duanfeng; Bihs, Hans (Chapter, 2021)The correct estimation of wave loading on a cylinder in a cylinder group under different impact scenarios is essential to determine the structural safety of coastal and offshore structures. This scenario differs from the ... -
Focused Plunging Breaking Waves Impact on Pile Group in Finite Water Depth
Cui, Ting; Kamath, Arun; Wang, Weizhi; Yuan, Lihao; Han, Duanfeng; Bihs, Hans (Peer reviewed; Journal article, 2022)Accuracy estimation of wave loading on cylinders in a pile group under different impact scenarios is essential for both the structural safety and cost of coastal and offshore structures. Differing from the interaction of ... -
Free Surface Reconstruction for Phase Accurate Irregular Wave Generation
Aggarwal, Ankit; Pakzodi, Csaba; Bihs, Hans; Myrhaug, Dag; Alagan Chella, Mayilvahanan (Journal article; Peer reviewed, 2018)The experimental wave paddle signal is unknown to the numerical modellers in many cases. This makes it quite challenging to numerically reproduce the time history of free surface elevation for irregular waves. In the present ... -
A fully nonlinear potential flow wave modelling procedure for simulations of offshore sea states with various wave breaking scenarios
Wang, Weizhi; Pakozdi, Csaba; Kamath, Arun; Bihs, Hans (Peer reviewed; Journal article, 2021)An accurate representation of a given sea state is crucial for the study of hydrodynamic loads on offshore structures. It is straightforward to check the quality of the reproduced regular waves in a numerical wave tank ... -
High-efficiency wind-farm-scale wave force estimation for preliminary design of offshore wind installations
Wang, Weizhi; Kamath, Arun; Pakozdi, Csaba; Bihs, Hans (Chapter, 2022)Many coastal wind farms are subject to a complex hydrodynamic environment due to bathymetry variations and irregular coastlines. The wave height statistical information does not linearly correlate to the wave loads on wind ... -
High-Fidelity Representation of Three-Hour Offshore Short-Crested Wave Field in the Fully Nonlinear Potential Flow Model REEF3D::FNPF
Wang, Weizhi; Pakozdi, Csaba; Kamath, Arun; Bihs, Hans (Chapter, 2020)Stochastic wave properties are crucial for the design of offshore structures. Short-crested seas are commonly seen at the sites of offshore structures, especially during storm events. A long time duration is required in ... -
Hydrodynamic Coupling of Viscous and Non-Viscous Numerical Wave Solutions Within the Open-Source Hydrodynamics Framework REEF3D
Wang, Weizhi; Pakozdi, Csaba; Kamath, Arun; Martin, Tobias; Bihs, Hans (Chapter, 2021)A comprehensive understanding of the marine environment in the offshore area requires phase-resolved wave information. For the far-field wave propagation, computational efficiency is crucial, as large spatial and temporal ... -
Hydrodynamic Coupling of Viscous and Nonviscous Numerical Wave Solutions Within the Open-Source Hydrodynamics Framework REEF3D
Wang, Weizhi; Pakozdi, Csaba; Kamath, Arun; Martin, Tobias; Bihs, Hans (Peer reviewed; Journal article, 2022)A comprehensive understanding of the marine environment in the offshore area requires phase-resolved wave information. For far-field wave propagation, computational efficiency is crucial, as large spatial and temporal ... -
Implementation of non-newtonian rheology for debris flow simulation with REEF3D
Fornes, Petter; Bihs, Hans; Thakur, Vikas Kumar Singh; Nordal, Steinar (Journal article, 2017)Landslides triggered by hydro-meteorological processes are a serious natural hazard in many areas of the world. The landslides of the debris flow type are often triggered by extreme precipitation events. These landslides ... -
Implementation of non-newtonian rheology for granular flow simulation
Fornes, Petter; Bihs, Hans; Nordal, Steinar (Chapter, 2017)Landslides of the debris flow type pose a serious natural hazard. These land-slides are often triggered by hydro-meteorological processes during extreme precipitationevents. Debris flows usually form a dense flow composed ...