Browsing NTNU Open by Author "Bihs, Hans"
Now showing items 61-80 of 131
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An Improved Depth-Averaged Non-Hydrostatic Shallow Water Model with Quadratic Pressure Approximation
Wang, Weizhi; Martin, Tobias; Kamath, Arun; Bihs, Hans (Peer reviewed; Journal article, 2020)Phase‐resolved information is necessary for many coastal wave problems, for example, for the wave conditions in the vicinity of harbor structures. Two‐dimensional (2D) depth‐averaging shallow water models are commonly used ... -
Influence of the upstream cylinder and wave breaking point on the breaking wave forces on the downstream cylinder
Kamath, Arun; Alagan Chella, Mayilvahanan; Bihs, Hans; Arntsen, Øivind Asgeir (Chapter, 2017)The interaction of breaking waves with marine structures involves complex free surface deformation and instantaneous loading on the structural members. A typical offshore platform or a coastal structure consists of several ... -
Investigation of Focusing Wave Properties in a Numerical Wave Tank with a Fully Nonlinear Potential Flow Model
Wang, Weizhi; Kamath, Arun; Pakozdi, Csaba; Bihs, Hans (Journal article; Peer reviewed, 2019)Nonlinear wave interactions and superpositions among the different wave components and wave groups in a random sea sometimes produce rogue waves with extremely large wave heights that appear unexpectedly. A good understanding ... -
Investigation of Free Surface Turbulence Damping in RANS Simulations for Complex Free Surface Flows
Kamath, Arun; Fleit, Gabor; Bihs, Hans (Journal article; Peer reviewed, 2019)The modelling of complex free surface flows over weirs and in the vicinity of bridge piers is presented in a numerical model emulating open channel flow based on the Reynolds Averaged Navier-Stokes (RANS) equations. The ... -
Investigation of Higher-Harmonic Wave Forces and Ringing Using CFD Simulations
Kamath, Arun; Bihs, Hans; Pakozdi, Csaba (Chapter, 2018)Typical offshore structures are designed as tension-leg platforms or gravity based structures with cylindrical substructures. The interaction of waves with the vertical cylinders in high sea states can result in a resonant ... -
Investigation of the effects of ship inducedwaves on the littoral zone with field measurements and CFD modeling
Feit, Gábor; Baranya, Sándor; Rüther, Nils; Bihs, Hans; Kramer, Támas; Józsa, János (Peer reviewed; Journal article, 2016)Waves induced by ship movement might be harmful for the habitat in the littoral zone of rivers due to the temporally increasing bed shear stress, the high-energy breaking waves and the consequently related detachment of ... -
A Lagrangian approach for the coupled simulation of fixed net structures in a Eulerian fluid model
Martin, Tobias; Kamath, Arun; Bihs, Hans (Peer reviewed; Journal article, 2020)A Lagrangian approach for the coupled numerical simulation of fixed net structures and fluid flow is derived. The model is based on solving the Reynolds-averaged Navier–Stokes equations in a Eulerian fluid domain. The ... -
Large scale cfd modelling of wave propagation in Sulafjord for the E39 project
Wang, Weizhi; Bihs, Hans; Kamath, Arun; Arntsen, Øivind Asgeir (Chapter; Peer reviewed, 2017)The coastal high way project E39 aims at building a continuous ferry-free road connection along the west coast of Norway. One of the major challenges in the project is to replace ferries with new fjord-crossing methods ... -
Large Scale CFD Modelling of Wave Propagation into Mehamn Harbour
Wang, Weizhi; Bihs, Hans; Kamath, Arun; Arntsen, Øivind Asgeir (Chapter, 2017)Ocean wave propagations into harbours are large scale phenomena with complex wave transformations. Computational fluid dynamics (CFD) has the advantage of capturing most physics with few assumptions. It has also been ... -
Large-Scale Numerical Modeling of Swell Waves in Bjørnafjorden Using the Phase-Resolving Wave Model REEF3D
Davik, Ingebrigt Eriksen (Master thesis, 2020)Numerisk simulering av bølger som beveger seg over raskt varierende vanndybde er ofte svært krevende. Bjørnafjorden er et perfekt eksempel på et marint område der små øyer og skjær forstyrrer bølgene, og hvor vanndybden ... -
Large-Scale Phase-Resolved Wave Modelling for the Norwegian Coast
Wang, Weizhi (Doctoral theses at NTNU;2020:235, Doctoral thesis, 2020)The coastal Highway Route E39 aims to build a continuous road connection along the west coast of Norway. Floating bridges are planned to replace the ferries at seven major fjords along the route. These innovative floating ... -
Modeling and Simulation of Moored-Floating Structures Using the Tension Element Method
Martin, Tobias; Kamath, Arun; Bihs, Hans (Peer reviewed; Journal article, 2019)The derivation of a discrete mooring model for floating structures is presented in this paper. The method predicts the steady-state solution for the shape of an elastic cable and the tension forces under consideration of ... -
Modeling porous coastal structures using a level set method based VRANS-solver on staggered grids
Sasikumar, Athul; Kamath, Arun; Bihs, Hans (Peer reviewed; Journal article, 2020)Several engineering problems in the field of coastal and offshore engineering involve flow interaction with porous structures such as breakwaters, sediment screens, and scour protection devices. In this paper, the interaction ... -
Modeling the Flow Around and the Hydrodynamic Drag on Net Meshes Using reef3d
Wang, Gang; Martin, Tobias; Huang, Liuyi; Bihs, Hans (Journal article; Peer reviewed, 2022) -
Modelling and Simulation of Moored-floating Structures using the Tension-Element-Method
Martin, Tobias; Kamath, Arun; Bihs, Hans (Chapter, 2018)The application of a discrete mooring model for floating structures is presented in this paper. The method predicts the steadystate solution for the shape of an elastic cable and the tension forces under consideration of ... -
Modelling Open Ocean Aquaculture Structures Using CFD and a Simulation-Based Screen Force Model
Martin, Tobias; Kamath, Arun; Wang, Gang; Bihs, Hans (Peer reviewed; Journal article, 2022)The numerical framework of the open source CFD solver REEF3D is utilised to study the fluid–structure interaction of an open ocean aquaculture system and waves. The presence of the net is considered in the momentum equations ... -
Modelling the flow around and wake behind net panels using large eddy simulations
Wang, Gang; Martin, Tobias; Huang, Liuyi; Bihs, Hans (Peer reviewed; Journal article, 2021)The fluid flow through a fixed net panel is investigated using large eddy simulations. Computational meshing strategies suitable for smooth and fabric twines are proposed. Numerical validations are conducted by comparing ... -
Multi-directional Irregular Wave Modelling with CFD
Wang, Weizhi; Bihs, Hans; Kamath, Arun; Arntsen, Øivind Asgeir (Chapter, 2019)The design of coastal structures requires accurate simulations of the wave conditions. Computational fluid dynamics (CFD) captures most complexities of the wave physics with few assumptions and therefore is considered to ... -
A new CFD-based framework for modelling the interaction of open ocean aquaculture structures and complex free surface hydrodynamics
Martin, Tobias (Doctoral theses at NTNU;2021:203, Doctoral thesis, 2021)The work presented in this PhD thesis provides the first numerical framework for the detailed simulation of open ocean aquaculture structures in the sea environment. It enables the simulation of the fluid-structure interaction ... -
A non-linear implicit approach for modelling the dynamics of porous tensile structures interacting with fluids
Martin, Tobias; Bihs, Hans (Peer reviewed; Journal article, 2021)A new model for the simulation of large motions of porous tensile structures and their interaction with the surrounding fluid is developed in this paper. The discrete structure is represented by several non-linear elastic ...