scholarly journals Discrete Data Transfer Technique for Fluid-Structure Interaction

2007 ◽  
Author(s):  
Jamshid Samareh
Keyword(s):  
Data Transfer ◽  
Fluid Structure Interaction ◽  
Discrete Data ◽  
Fluid Structure ◽  
Structure Interaction

scholarly journals A fluid-structure interaction analysis of the human aortic arch under inertial load

2021 ◽  
Author(s):  
Jonathan M Zalger
Keyword(s):  
Mass Flow ◽  
Data Transfer ◽  
Interaction Analysis ◽  
Fluid Structure Interaction ◽  
Longitudinal Axis ◽  
Tissue Response ◽  
Upper Body ◽  
Inertial Load ◽  
Fluid Structure ◽  
Structure Interaction

Presented is an investigation into the use of numerical methods for modelling the effects of inertial load on the human cardiovascular system. An anatomically correct geometry was developed based on three-dimensional computed tomography (CT) data and independent meshes were created for the solid and fluid regimes. These domains were simulated using independent solvers and subsequently coupled using an intermediate data transfer alogrithm. At the inlet of the arch, a pulsatile velocity boundary condition was enforced replicating the cardiac cycle. Time invariant, resistive boundary conditions were used at all outlets and a linear isotropic constitutive model was used for tissue response. Verification was conducted by comparing simulation results at standard earth gravity (9.81 m/s²) with published values for velocity, mass flow rate, deformation, and qualitative flow behaviour. The presented fluid-structure interaction (FSI) model shows strong agreement with accepted normal values. Inertial load was then applied along the longitudinal axis of the arch in multiples of standard gravity to a maximum of 8+Gz. This load increased arch flow velocities, and reduced mass flow in the ascending brachiocephalic and carotid arteries. Blood flow from the arch to the upper body and brain ceased near 8+Gz. Although the presented results are preliminary, the feasibility of such an analysis has been successfully demonstrated.

Fluid–structure interaction and flight dynamics analysis of parachute–payload system during uncontrolled airdrop process

2017 ◽  
Vol 232 (13) ◽  
pp. 2499-2512 ◽  
Author(s):  
Xinglong Gao ◽  
Qingbin Zhang ◽  
Qiangang Tang
Keyword(s):  
Data Transfer ◽  
Fluid Structure Interaction ◽  
Flight Dynamics ◽  
Coupling Model ◽  
Wind Gust ◽  
Finite Mass ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Flight Dynamics Model ◽  
Mass Inflation

The coupling behaviors of a special parachute’s inflation incorporating fluid–structure interaction and flight dynamics are investigated based on the multibody dynamic model and LS-DYNA nonlinear analysis code. A new coupling model is developed to predict both the opening phase of parachute and the trajectory of payload during airdrop mission in low attitude. The moving mesh technology is introduced to realize the finite mass inflation simulation. A simplified integration platform is built by coupling the fluid–structure interaction and flight dynamics model, and solved based on two-way data transfer to efficiently replicate the dynamic characteristics of parachute finite mass inflation. Finally, the opening performances of the parachute at different airdropping velocities are analyzed and compared with the experimental results. The unsteady flow dynamics is simulated and the wake re-contacts phenomenon occurred. Taking consideration of the periodical disturb of wind gust, the trajectory of parachute–payload system is simulated and compared with the real airdrop test results. In conclusion, the results show that this coupling model is efficient to simulate and predict the dynamics behaviors of parachute–payload system in a finite mass inflation scenario, which will be beneficial for airdrop missions.

Study on Data Transfer Methods for Fluid-Structure Interaction Analysis

2011 ◽  
Vol 255-260 ◽  
pp. 3579-3583
Author(s):  
Bo Su ◽  
Ruo Jun Qian ◽  
Xiang Ke Han
Keyword(s):  
Data Exchange ◽  
Data Transfer ◽  
Interaction Analysis ◽  
Fluid Structure Interaction ◽  
Induced Response ◽  
Response Analysis ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Compactly Supported ◽  
Transfer Method

The data transfer method for fluid structure interaction analysis using compactly supported radial based function (CRBF-FSI) is studied. It builds transfer matrix for data exchange and makes fluid and structure mesh use different shape and density unrestrictedly. Example of data exchange on 3D interface is studied. The efficient and the accurate of CRBF-FSI method are analyzed and also the influence of different compactly-supported radius is studied. The results show that CRBF-FSI method is suitable for FSI data transfer on complicated interface if compactly-supported radius is properly chosen. It has a bright future in practical use such as wind-induced response analysis in Wind Engineering.

Fluid-Structure Interaction Simulation by Smoothed Particle Hydrodynamics

2010 ◽  
Author(s):  
Mostafa Safdari Shadloo ◽  
Amir Zainali ◽  
Mehmet Yildiz
Keyword(s):  
Data Transfer ◽  
Fluid Structure Interaction ◽  
Elastic Beam ◽  
Simulation Method ◽  
Smoothing Function ◽  
Time Saving ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Intermediate Data ◽  
Sph Algorithm

In this article, a modified SPH algorithm is proposed to solve Fluid-Structure Interaction (FSI) problems including fluid flow in interaction with compatible structures under a large deformation. To validate the current algorithm against available data in literature, we consider two important benchmark cases; namely, an oscillating elastic beam and dam breaking problems. The proposed algorithm is based on the elimination of the intermediate data transfer steps between the fluid and the solid structures, whereby resulting in an easy and time-saving simulation method. With the test application studied, we were able to prove the ability of the modified SPH method for solving of fluid and solid domains monolithically without the need to define an interfacial boundary condition or any additional steps to simulate the deformation of an elastic dam. Numerical results suggest that upon choosing correct SPH parameters such as smoothing function, and lengths, as well as coefficients for artificial viscosity and artificial stress, one can obtain results in satisfactorily agreement with numerical findings of earlier works.

scholarly journals A fluid-structure interaction analysis of the human aortic arch under inertial load

2021 ◽  
Author(s):  
Jonathan M Zalger
Keyword(s):  
Mass Flow ◽  
Data Transfer ◽  
Interaction Analysis ◽  
Fluid Structure Interaction ◽  
Longitudinal Axis ◽  
Tissue Response ◽  
Upper Body ◽  
Inertial Load ◽  
Fluid Structure ◽  
Structure Interaction

Presented is an investigation into the use of numerical methods for modelling the effects of inertial load on the human cardiovascular system. An anatomically correct geometry was developed based on three-dimensional computed tomography (CT) data and independent meshes were created for the solid and fluid regimes. These domains were simulated using independent solvers and subsequently coupled using an intermediate data transfer alogrithm. At the inlet of the arch, a pulsatile velocity boundary condition was enforced replicating the cardiac cycle. Time invariant, resistive boundary conditions were used at all outlets and a linear isotropic constitutive model was used for tissue response. Verification was conducted by comparing simulation results at standard earth gravity (9.81 m/s²) with published values for velocity, mass flow rate, deformation, and qualitative flow behaviour. The presented fluid-structure interaction (FSI) model shows strong agreement with accepted normal values. Inertial load was then applied along the longitudinal axis of the arch in multiples of standard gravity to a maximum of 8+Gz. This load increased arch flow velocities, and reduced mass flow in the ascending brachiocephalic and carotid arteries. Blood flow from the arch to the upper body and brain ceased near 8+Gz. Although the presented results are preliminary, the feasibility of such an analysis has been successfully demonstrated.

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