An Approach to Generate Level Set Function from STL File for Fluid-Structure Interaction Computations

2021 ◽  
pp. 61-68
Author(s):  
Son Tung Dang ◽  
Stein Tore Johansen ◽  
Iskander Akhatov
Keyword(s):  
Level Set ◽  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Stl File ◽  
Level Set Function ◽  
Set Function

scholarly journals Modelling and Simulation of Moored-Floating Structures Using the Tension-Element-Method

2018 ◽  
Author(s):  
Tobias Martin ◽  
Arun Kamath ◽  
Hans Bihs
Keyword(s):  
Fluid Structure Interaction ◽  
Steady State Solution ◽  
Immersed Boundary ◽  
Matrix Size ◽  
Fluid Structure ◽  
Floating Structures ◽  
Structure Interaction ◽  
Level Set Function ◽  
The Matrix ◽  
Set Function

The application 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 static loads. It is based on a discretization of the cable in mass points connected with straight but elastic bars. The successive approximation is applied to the resulting system of equations which leads to a significant reduction of the matrix size in comparison to the matrix of a Newton-Raphson method. The mooring model is implemented in the open-source CFD model REEF3D. The solver has been used to study various problems in the field of wave hydrodynamics and fluid-structure interaction. It includes floating structures through a level set function and captures its motion using Newton and Euler equations in 6DOF. The fluid-structure interaction is solved explicitly using an immersed boundary method based on the ghost cell method. The applications show the accuracy of the solver and effects of mooring on the motion of floating structures.

Modeling and Simulation of Moored-Floating Structures Using the Tension Element Method

2019 ◽  
Vol 142 (1) ◽  
Author(s):  
Tobias Martin ◽  
Arun Kamath ◽  
Hans Bihs
Keyword(s):  
Degrees Of Freedom ◽  
Fluid Structure Interaction ◽  
Steady State Solution ◽  
Immersed Boundary ◽  
Fluid Structure ◽  
Floating Structures ◽  
Structure Interaction ◽  
Level Set Function ◽  
The Matrix ◽  
Set Function

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 static loads. It is based on a discretization of the cable in mass points connected with straight but elastic bars. The successive approximation is applied to the resulting system of equations which leads to a significant reduction of the matrix size in comparison to the matrix of a Newton–Raphson method. The mooring model is implemented in the open-source computational fluid dynamics (CFD) model REEF3D. The solver has been used to study various problems in the field of wave hydrodynamics and fluid–structure interaction. It includes floating structures through a level set function and captures its motion using Newton and Euler equations in six degrees-of-freedom (6DOF). The fluid–structure interaction is solved explicitly using an immersed boundary method based on the ghost cell method. The applications show the accuracy of the solver and the effects of mooring on the motion of floating structures.

Sign in / Sign up

Export Citation Format

Share Document