A Comparison Study of Coupling Algorithms for Fluid-Structure Interaction Problems

2011 ◽  
Author(s):  
Tolotra Emerry Rajaomazava ◽  
Mustapha Benaouicha ◽  
Jacques-Andre´ Astolfi
Keyword(s):  
Computing Time ◽  
Fluid Structure Interaction ◽  
Interface Position ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Coupled Problem ◽  
Moving Interface ◽  
Conservation Condition ◽  
Coupling Algorithms ◽  
Implicit And Explicit

The influence of numerical schemes for solving coupled problem in fluid-structure interaction is addressed. A non-linear Burgers equation in a bounded domain with moving interface is solved by finite element method (FEM). The implicit and explicit coupling algorithms are studied with interface equation solved at outside then inside of Newton iterative procedure (referred to as implicit-outer, implicit-inner, explicit and semi-implicit schemes respectively). Iteration numbers and computing time are compared for each algorithm. The interface position and energy conservation condition at the interface are discussed.

A reduced mesh movement method based on pseudo elastic solid for fluid–structure interaction

2017 ◽  
Vol 232 (6) ◽  
pp. 973-986
Author(s):  
Jize Zhong ◽  
Zili Xu
Keyword(s):  
Computing Time ◽  
Fluid Structure Interaction ◽  
Elastic Solid ◽  
Continuity Condition ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Wing Flutter ◽  
Mesh Movement ◽  
Nodal Displacements ◽  
Low Order

A reduced mesh movement method based on pseudo elastic solid is developed and applied in fluid–structure interaction problems in this paper. The flow mesh domain is assumed to be a pseudo elastic solid. The vibration equation for the structure and the pseudo elastic solid together is derived by applying the displacement continuity condition on the fluid–structure interface. Considering that the actual fluid–structure coupled vibration for structures often appears to be associated with low-order modes, the nodal displacements for the structure and the flow mesh can be computed using the modal superposition of a few low-order modes. Coupled fluid–structure computations are performed for flutter problems of a beam and wing 445.6 using the present method. The calculated results are consistent with the data reported in other references. The computing time is reduced by 65.5% for the beam flutter and 54.8% for the wing flutter compared with the pre-existing elastic solid method.

scholarly journals Solving fluid-structure interaction problems using strong coupling algorithms with the component template library (CTL)

PAMM ◽  
2008 ◽  
Vol 8 (1) ◽  
pp. 10987-10988 ◽  
Author(s):  
Joachim Rang ◽  
Martin Krosche ◽  
R. Niekamp ◽  
Hermann G. Matthies
Keyword(s):  
Strong Coupling ◽  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Template Library ◽  
Coupling Algorithms

Study of Fluid Structure Interaction Using Sharp Interface Immersed Boundary Method

2016 ◽  
Author(s):  
Long He ◽  
Keyur Joshi ◽  
Danesh Tafti
Keyword(s):  
Immersed Boundary Method ◽  
Fluid Structure Interaction ◽  
Linear Structure ◽  
Current Approach ◽  
Sharp Interface ◽  
Immersed Boundary ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Boundary Method ◽  
Coupling Algorithms

In this work, we present an approach for solving fluid structure interaction problems by combining a non-linear structure solver with an incompressible fluid solver using immersed boundary method. The implementation of the sharp-interface immersed boundary method with the fluid solver is described. A structure solver with the ability to handle geometric nonlinearly is developed and tested with benchmark cases. The partitioned fluid-structure coupling algorithm with the strategy of enforcing boundary conditions at the fluid/structure interaction is given in detail. The fully coupled FSI approach is tested with the Turek and Hron fluid-structure interaction benchmark case. Both strong coupling and weak coupling algorithms are examined. Predictions from the current approach show good agreement with the results reported by other researchers.

scholarly journals A partitioned solution approach for fluid-structure interaction problems in the arterial system

2020 ◽  
Author(s):  
Lars Radtke
Keyword(s):  
Hierarchical Modeling ◽  
Fluid Structure Interaction ◽  
Convergence Acceleration ◽  
Arterial System ◽  
Fluid Structure ◽  
Reduced Order ◽  
Solution Approach ◽  
Structure Interaction ◽  
System P ◽  
Coupling Algorithms

The present work is concerned with the partitioned solution of the multifeld problem arising from a hierarchical modeling approach to cardiovascular fluid-structure interaction. Different strategies to couple the participating feld solvers are investigated in detail. This includes staggered and parallel coupling algorithms as well as different methods for convergence acceleration, spatial interpolation and temporal extrapolation of coupling quantities. In the developed modeling and simulation approach, a fully resolved model of a segment of the arterial network is coupled to reduced order models in order to account for the influence of the surrounding. There is experimental evidence that hemodynamic quantities such as the wall shear stress promote the progression cardiovascular disease. Cardiovascular FSI simulations, that can predict these quantities, are therefore of great interest and can aid in surgical planning and optimization of anastomoses shapes and graft materials. Contents...

scholarly journals Numerical Investigation of Pulse Wave Propagation in Arteries Using Fluid Structure Interaction Capabilities

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Hisham Elkenani ◽  
Essam Al-Bahkali ◽  
Mhamed Souli
Keyword(s):  
Wave Propagation ◽  
Pulse Wave ◽  
Regression Line ◽  
Computing Time ◽  
Fluid Structure Interaction ◽  
Elastic Tube ◽  
Contour Plot ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Constitutive Material Model

The aim of this study is to present a reliable computational scheme to serve in pulse wave velocity (PWV) assessment in large arteries. Clinicians considered it as an indication of human blood vessels’ stiffness. The simulation of PWV was conducted using a 3D elastic tube representing an artery. The constitutive material model specific for vascular applications was applied to the tube material. The fluid was defined with an equation of state representing the blood material. The onset of a velocity pulse was applied at the tube inlet to produce wave propagation. The Coupled Eulerian-Lagrangian (CEL) modeling technique with fluid structure interaction (FSI) was implemented. The scaling of sound speed and its effect on results and computing time is discussed and concluded that a value of 60 m/s was suitable for simulating vascular biomechanical problems. Two methods were used: foot-to-foot measurement of velocity waveforms and slope of the regression line of the wall radial deflection wave peaks throughout a contour plot. Both methods showed coincident results. Results were approximately 6% less than those calculated from the Moens-Korteweg equation. The proposed method was able to describe the increase in the stiffness of the walls of large human arteries via the PWV estimates.

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