On blowdown analysis with efficient and reliable direct time integration methods for wave propagation and fluid-structure-interaction response

2019 ◽  
Vol 216 ◽  
pp. 1-14 ◽  
Author(s):  
Kenth Nilsson ◽  
Fredrik Tornberg
Keyword(s):  
Wave Propagation ◽  
Fluid Structure Interaction ◽  
Time Integration ◽  
Integration Methods ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Time Integration Methods

Explicit and Implicit Code Coupling Schemes in Fluid Structure Interaction

2005 ◽  
Author(s):  
E. Longatte ◽  
Z. Bendjeddou ◽  
V. Verreman ◽  
M. Souli
Keyword(s):  
Fluid Structure Interaction ◽  
Time Integration ◽  
Good Choice ◽  
Integration Scheme ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Interaction Field ◽  
Analytical Test ◽  
Time Integration Scheme ◽  
Implicit Code

In multi-physics numerical computations a good choice of code coupling schemes is required. Several methods are possible like: an explicit synchronous scheme an Euler implicit method and no interpolation on velocity pressure; an explicit asynchonous scheme using a Crank-Nicholson time integration scheme and interpolation on velocity and pressure; an implicit scheme using a fixed iterative method. In the present paper these different schemes are compared for application in fluid structure interaction field. In the first part numerical coupling schemes are presented. Then their capability to ensure energy conservation is discussed according to numerical results obtained in analytical test cases. Finally application of coupling process to fluid structure interaction problems is investigated and results are discussed in terms of added mass and damping induced by a fluid for a structure vibrating in fluid at rest.

Comparison of time‐integration schemes for fluid‐structure interaction.

2008 ◽  
Vol 124 (4) ◽  
pp. 2574-2574
Author(s):  
Aldo A. Ferri ◽  
Mohammed Kapacee ◽  
Jerry H. Ginsberg ◽  
Marilyn Smith
Keyword(s):  
Fluid Structure Interaction ◽  
Time Integration ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Integration Schemes ◽  
Time Integration Schemes

WALL SHEAR STRESSES IN A FLUID–STRUCTURE INTERACTION MODEL OF PULSE WAVE PROPAGATION

2014 ◽  
Vol 14 (02) ◽  
pp. 1450019 ◽  
Author(s):  
FAN HE
Keyword(s):  
Wave Propagation ◽  
Pulse Wave ◽  
Fluid Structure Interaction ◽  
Interaction Model ◽  
Elastic Tube ◽  
Tube Model ◽  
Pulse Wave Propagation ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Internal Radius

In our prior paper, a fluid–structure interaction model of pulse wave propagation, called the elastic tube model, has been developed. The focus of this paper is wall shear stress (WSS) in this model and the effects of different parameters, including rigid walls, wall thickness, and internal radius. The unsteady flow was assumed to be laminar, Newtonian and incompressible, and the vessel wall to be linear-elastic isotropic, and incompressible. A fluid–structure interaction scheme is constructed using a finite element method. The results demonstrate the elastic tube plays an important role in WSS distributions of wave propagation. It is shown that there is a time delay between the WSS waveforms at different locations in the elastic tube model while the time delay cannot be observed clearly in the rigid tube model. Compared with the elastic tube model, the increase of the wall thickness makes disturbed WSS distributions, however WSS values are increased greatly due to the decrease of the internal radius. The results indicate that the effects of different parameters on WSS distributions are significant. The proposed model gives valid results.

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