Blar i NTNU Open på forfatter "Kamath, Arun"
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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 ... -
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 wave transformation and breaking processes in the coastal zone using REEF3D
Elakel, Mohamed (Master thesis, 2018)Several human activities and industries that contribute in shaping the communities and economies around the world are located in the coastal zone. Therefore, it is very crucial to understand the behaviour of the coastal ... -
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 ... -
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 ... -
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 flood events in the Arno River and the interaction with the infrastructures in the city of Florence using REEF3D
Nuti, Niccolò (Master thesis, 2018)The first part of this work provides the numerical model overview including the governing equations, the turbulence model and the discretization methods. The second part describes the geographical position of Florence, its ... -
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 ... -
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 ...