Blar i Institutt for bygg- og miljøteknikk på forfatter "Martin, Tobias"
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Accurate modelling of the interaction of constrained floating structures and complex free surfaces using a new quasi-static mooring model
Martin, Tobias; Kamath, Arun; Bihs, Hans (Peer reviewed; Journal article, 2021)A new approach for the coupled simulation of moored floating structures in a numerical wave tank using CFD is subject of this article. A quasistatic mooring model is derived by dividing the cable into finite elements and ... -
A CFD Approach for Modelling the Fluid-Structure Interaction of Offshore Aquaculture Cages and Waves
Martin, Tobias; Bihs, Hans (Peer reviewed; Journal article, 2021)Open ocean aquaculture cages became a promising alternative to traditional fish cage designs recently. The offshore environment implies larger loads on the structure and thus higher risk for fish loss. Floating rigid ... -
A CFD Approach for Modelling the Fluid-Structure Interaction of Offshore Aquaculture Cages and Waves
Martin, Tobias; Bihs, Hans (Chapter, 2021)Open ocean aquaculture cages became recently a promising alternative to traditional fish cage designs. The offshore environment implies larger loads on the structures and higher risk of fish loss. Floating rigid aquaculture ... -
CFD Modelling of Hydrodynamics in Land-Based Aquaculture Tanks
Lysø, Brage (Master thesis, 2020)Fisk er en effektiv kilde til viktige næringsstoffer på grunn av et rikt innhold av høyverdig protein, viktige vitaminer, mineraler og omega-3 fettsyrer, samt et lavt innhold av mettet fett, karbohydrater og kolesterol. I ... -
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 WENO library for OpenFOAM
Gärtner, Jan Wilhelm; Kronenburg, Andreas; Martin, Tobias (Peer reviewed; Journal article, 2020)The weighted essentially non oscillating (WENO) concept is well established in research and its advantages are known, however, implementation details such as memory demand hindered the usage for general applications and ... -
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 ... -
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 and Validation of Semi-Implicit WENO Schemes Using OpenFOAM
Martin, Tobias; Shevchuk, Ivan (Journal article; Peer reviewed, 2018)In this article, the development of high-order semi-implicit interpolation schemes for convection terms on unstructured grids is presented. It is based on weighted essentially non-oscillatory (WENO) reconstructions which ... -
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 ... -
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 ... -
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 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 ... -
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 ... -
Numerical and experimental investigation of floating structures in regular waves
Dempwolff, Leon-Carlos; Martin, Tobias; Kamath, Arun; Bihs, Hans (Chapter, 2019)In this paper, an experimental and numerical study of a floating object is presented. The incorporation of both experimental and numerical tools for the investigation of a simple floating object provides the opportunity ...