scholarly journals A numerical approach for simulating fluid structure interaction of flexible thin shells undergoing arbitrarily large deformations in complex domains

2015 ◽  
Vol 300 ◽  
pp. 814-843 ◽  
Author(s):  
Anvar Gilmanov ◽  
Trung Bao Le ◽  
Fotis Sotiropoulos
Keyword(s):  
Large Deformations ◽  
Fluid Structure Interaction ◽  
Numerical Approach ◽  
Thin Shells ◽  
Fluid Structure ◽  
Structure Interaction

Numerical investigation of nonlinear fluid–structure interaction dynamic behaviors under a general Immersed Boundary-Lattice Boltzmann-Finite Element method

2018 ◽  
Vol 29 (04) ◽  
pp. 1850038 ◽  
Author(s):  
Chun-Lin Gong ◽  
Zhe Fang ◽  
Gang Chen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Lattice Boltzmann ◽  
Fluid Structure Interaction ◽  
Numerical Approach ◽  
Immersed Boundary ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Flexible Objects ◽  
Element Method

A numerical approach based on the immersed boundary (IB), lattice Boltzmann and nonlinear finite element method (FEM) is proposed to simulate hydrodynamic interactions of very flexible objects. In the present simulation framework, the motion of fluid is obtained by solving the discrete lattice Boltzmann equations on Eulerian grid, the behaviors of flexible objects are calculated through nonlinear dynamic finite element method, and the interactive forces between them are implicitly obtained using velocity correction IB method which satisfies the no-slip conditions well at the boundary points. The efficiency and accuracy of the proposed Immersed Boundary-Lattice Boltzmann-Finite Element method is first validated by a fluid–structure interaction (F-SI) benchmark case, in which a flexible filament flaps behind a cylinder in channel flow, then the nonlinear vibration mechanism of the cylinder-filament system is investigated by altering the Reynolds number of flow and the material properties of filament. The interactions between two tandem and side-by-side identical objects in a uniform flow are also investigated, and the in-phase and out-of-phase flapping behaviors are captured by the proposed method.

A CFD Approach for Modelling the Fluid-Structure Interaction of Offshore Aquaculture Cages and Waves

2021 ◽  
Author(s):  
Tobias Martin ◽  
Hans Bihs
Keyword(s):  
Fluid Structure Interaction ◽  
Numerical Approach ◽  
Numerical Wave Tank ◽  
Promising Alternative ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Cage System ◽  
Offshore Aquaculture ◽  
Open Ocean Aquaculture ◽  
The Waves

Abstract 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 cages with stiff nets are considered as a possible solution to cope with these new challenges. Their design process requires more advanced tools to account for the non-linear fluid-structure interaction. This paper presents a suitable numerical approach for analysing the interaction of offshore aquaculture cages and waves using Computational Fluid Dynamics. Here, a numerical wave tank accounts for the accurate propagation of the waves, and structural dynamics solutions are utilised for the cage system. Two-way coupling is enabled by accounting for the influence of the net on the fluid. The numerical model is validated against measurements for the loads on and the responses of a mobile floating fish farm in waves and current.

Fluid structure interaction between rods and a cross flow – Numerical approach

2011 ◽  
Vol 241 (11) ◽  
pp. 4515-4522 ◽  
Author(s):  
Jan-patrice Simoneau ◽  
Thomas Sageaux ◽  
Nadim Moussallam ◽  
Olivier Bernard
Keyword(s):  
Fluid Structure Interaction ◽  
Cross Flow ◽  
Numerical Approach ◽  
Fluid Structure ◽  
Structure Interaction

An Approach on Fluid-Structure Interaction for Hemodynamics of Carotid Arteries

2012 ◽  
Author(s):  
Sang Hyuk Lee ◽  
Seongwon Kang ◽  
Nahmkeon Hur
Keyword(s):  
Blood Flow ◽  
Carotid Artery ◽  
Solid Mechanics ◽  
Fluid Structure Interaction ◽  
Blood Rheology ◽  
Numerical Approach ◽  
Patient Specific ◽  
Circulation System ◽  
Fluid Structure ◽  
Structure Interaction

In the present study, a problem of the hemodynamic fluid-structure interaction (FSI) in the carotid artery was analyzed using a numerical approach. To predict the blood flow and arterial deformation, a framework for the FSI analysis was developed by coupling computational fluid dynamics (CFD) and solid mechanics (CSM) approaches. Using this framework, the hemodynamics of the carotid artery was simulated with the patient-specific clinical data of the arterial geometry, pulsatile blood flow and blood rheology. It is found that the hemodynamic characteristics of the carotid artery are significantly affected by its geometric factors and flow conditions, and relatively low values of the wall shear stress were observed in the post-plaque dilated region of the carotid bifurcated area. Since these characteristics of the carotid artery are affected by the cerebral circulation system, the effects of the cardiac output and the distal vascular resistance on hemodynamics were also analyzed.

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