Browsing Fakultet for ingeniørvitenskap (IV) by Author "Kamath, Arun"
Now showing items 21-40 of 95
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CFD Simulations of Wave Propagation and Shoaling over a Submerged Bar
Kamath, Arun; Bihs, Hans; Alagan Chella, Mayilvahanan; Arntsen, Øivind Asgeir (Journal article; Peer reviewed, 2015)The wave propagation over a submerged bar is simulated using the open source CFD model REEF3D and the numerical results are compared to the experimental data. The transformation of the wave resulting in higher harmonics ... -
CFD Simulations to Determine Wave Forces on a Row of Cylinders
Kamath, Arun; Bihs, Hans; Alagan Chella, Mayilvahanan; Arntsen, Øivind Asgeir (Journal article; Peer reviewed, 2015)The open source Computational Fluid Dynamics (CFD) model REEF3D is used to simulate interaction of low steepness linear waves and high steepness 5th-order Stokes waves with a single cylinder and linear arrays of two, three, ... -
A comparison of different wave modelling techniques in an open-source hydrodynamic framework
Wang, Weizhi; Kamath, Arun; Pakozdi, Csaba; Bihs, Hans (Peer reviewed; Journal article, 2020)Modern design for marine and coastal activities places increasing focus on numerical simulations. Several numerical wave models have been developed in the past few decades with various techniques and assumptions. Those ... -
Complex geometry handling for a cartesian grid based solver
Bihs, Hans; Kamath, Arun; Alagan Chella, Mayilvahanan; Pakozdi, Csaba (Chapter, 2017)Complex geometries can be a challenge for computational fluid dynamics (CFD) solvers that use a Cartesian mesh. In the current paper, an algorithm is described with which complex geometry features can be incorporated in a ... -
A direct forcing immersed boundary method for simulating floating objects
Soydan, Ahmet; Wang, Weizhi; Kamath, Arun; Bihs, Hans (Chapter, 2022)For ship and offshore applications, the fluid-floating object interaction is of particular importance and accurate numerical calculations are required. However, low-order accurate methods are not sufficient to have decent ... -
Effect of Emerged Coastal Vegetation on Wave Attenuation Using Open Source CFD Tool: REEF3D
Arunakumar, H S; Suvarna, Praveen; Abhijith, P A; Prabhu, Ashwin S; Pruthviraj, U; Kamath, Arun (Chapter, 2019)Coastal vegetation is a soft solution for protecting the coast from the action of waves by attenuating the wave height and reducing the energy of the waves. Effect of wave height attenuation as a result of the presence of ... -
Effect of girder spacing and depth on solitary wave impact on coastal bridge deck for different airgaps
Moideen, Rameeza; Behera, Manas; Kamath, Arun; Bihs, Hans (Journal article; Peer reviewed, 2019)Coastal bridge damage has become a severe issue of concern in the recent past with the destruction of a considerable number of bridges under the impact of waves during tsunami and storm surges. These events have become ... -
Effects of Power Take-Off Damping and Model Scaling on the Hydrodynamic Performance of Oscillating Water Column Device
Ashlin, S John; Sannasiraj, S A; Sundar, Vallam; Kamath, Arun; Bihs, Hans (Chapter, 2019)A systematic numerical investigation on the hydrodynamic performance of an oscillating water column (OWC) system for different damping values from the power take-off (PTO) device and at different model scales has been ... -
Efficient Calculation of Spatial and Temporal Evolution of Hydrodynamic Loads on Offshore Wind Substructures
Pakozdi, Csaba; Kamath, Arun; Wang, Weizhi; Martin, Tobias; Bihs, Hans (Chapter, 2021)Estimation of the hydrodynamic loads based on strip theory with the Morrison equation provides a fast and inexpensive method for load estimation for the offshore industry. The advantage of this approach is that it requires ... -
Efficient Wave Modeling Using Non-Hydrostatic Pressure Distribution and Free Surface Tracking on Fixed Grids
Bihs, Hans; Kamath, Arun; Aggarwal, Ankit; Pakozdi, Csaba (Chapter; Peer reviewed, 2018)For the estimation of wave loads on offshore structures, relevant extreme wave events need to be identified. In order to achieve this, long term wave simulations of relatively large scales need to be performed. Computational ... -
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 ... -
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 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 ... -
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 ... -
Fully nonlinear phase-resolved wave modelling in the Norwegian fjords for floating bridges along the E39 coastal highway
Wang, Weizhi; Pakozdi, Csaba; Kamath, Arun; Bihs, Hans (Journal article; Peer reviewed, 2023)Coastal wave conditions are highly influenced by bathymetry variations and coastlines. The Norwegian fjords present large gradients of bathymetry changes and irregular coastline geometries that make the understanding of ...