scholarly journals On the stability of the coupling of 3D and 1D fluid-structure interaction models for blood flow simulations

2007 ◽  
Vol 41 (4) ◽  
pp. 743-769 ◽  
Author(s):  
Luca Formaggia ◽  
Alexandra Moura ◽  
Fabio Nobile
Keyword(s):  
Blood Flow ◽  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Interaction Models ◽  
Flow Simulations ◽  
Structure Interaction ◽  
The Stability

Coupling 3D and 1D fluid-structure interaction models for blood flow simulations

PAMM ◽  
2006 ◽  
Vol 6 (1) ◽  
pp. 27-30 ◽  
Author(s):  
L. Formaggia ◽  
A. Moura ◽  
F. Nobile
Keyword(s):  
Blood Flow ◽  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Interaction Models ◽  
Flow Simulations ◽  
Structure Interaction

scholarly journals Computational Investigation of the Stability of Stenotic Carotid Artery under Pulsatile Blood Flow Using a Fluid-Structure Interaction Approach

2020 ◽  
pp. 2050110
Author(s):  
Amirhosein Manzoori ◽  
Famida Fallah ◽  
Mohammadali Sharzehee ◽  
Sina Ebrahimi
Keyword(s):  
Blood Flow ◽  
Carotid Artery ◽  
Fluid Structure Interaction ◽  
Circumferential Stress ◽  
Artery Stenosis ◽  
Shear Stresses ◽  
Pulsatile Blood Flow ◽  
Fluid Structure ◽  
Structure Interaction ◽  
The Stability

Stenosis can disrupt the normal pattern of blood flow and make the artery more susceptible to buckling which may cause arterial tortuosity. Although the stability simulations of the atherosclerotic arteries were conducted based on solid modeling and static internal pressure, the mechanical stability of stenotic artery under pulsatile blood flow remains unclear while pulsatile nature of blood flow makes the artery more critical for stresses and stability. In this study, the effect of stenosis on arterial stability under pulsatile blood flow was investigated. Fluid–structure interaction (FSI) simulations of artery stenosis under pulsatile flow were conducted. 3D idealized geometries of carotid artery stenosis with symmetric and asymmetric plaques along with different percentages of stenosis were created. It was observed that the stenosis percentage, symmetry/asymmetry of the plaque, and the stretch ratio can dramatically affect the buckling pressure. Buckling makes the plaques (especially in asymmetric ones) more likely to rupture due to increasing the stresses on it. The dominant stresses on plaques are the circumferential, axial and radial ones, respectively. Also, the highest shear stresses on the plaques were detected in [Formula: see text] and [Formula: see text] planes for the symmetric and asymmetric stenotic arteries, respectively. In addition, the maximum circumferential stress on the plaques was observed in the outer point of the buckled configuration for symmetric and asymmetric stenosis as well as at the ends of the asymmetric plaque. Furthermore, the artery buckling causes a large vortex flow at the downstream of the plaque. As a result, the conditions for the penetration of lipid particles and the formation of new plaques are provided.

scholarly journals A simplified method to account for wall motion in patient-specific blood flow simulations of aortic dissection: Comparison with fluid-structure interaction

2018 ◽  
Vol 58 ◽  
pp. 72-79 ◽  
Author(s):  
Mirko Bonfanti ◽  
Stavroula Balabani ◽  
Mona Alimohammadi ◽  
Obiekezie Agu ◽  
Shervanthi Homer-Vanniasinkam ◽  
...  
Keyword(s):  
Blood Flow ◽  
Aortic Dissection ◽  
Wall Motion ◽  
Fluid Structure Interaction ◽  
Patient Specific ◽  
Fluid Structure ◽  
Flow Simulations ◽  
Structure Interaction ◽  
Simplified Method

scholarly journals Computational Investigation of the Stability of Stenotic Carotid Artery under Pulsatile Blood Flow Using a Fluid-Structure Interaction Approach

2020 ◽  
Author(s):  
Amirhosein Manzoori ◽  
Famida Fallah ◽  
Mohammadali Sharzehee ◽  
Sina Ebrahimi
Keyword(s):  
Blood Flow ◽  
Plaque Rupture ◽  
Fluid Structure Interaction ◽  
Circumferential Stress ◽  
Shear Stresses ◽  
Pulsatile Blood Flow ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Lipid Particles ◽  
The Stability

Abstract Background Stenosis can disrupt the normal pattern of blood flow, and thus make the artery more susceptible to buckling which may cause arterial tortuosity. Although the stability simulations of the atherosclerotic arteries were conducted based on solid modelling and static internal pressure, the mechanical stability of stenotic artery under pulsatile blood flow remains unclear while pulsatile nature of blood flow makes the artery more critical for stresses and stability. The aim of this study was to investigate the effect of stenosis on arterial stability under pulsatile blood flow. Methods To this end, fluid-structure interaction (FSI) simulations of arteries stenosis under pulsatile flow were conducted. 3D idealized geometries of carotid arteries stenosis with symmetric and asymmetric plaques along with different percentages of stenosis were created. Arterial wall was modelled as an anisotropic hyperelasic material. Results It is observed that the stenosis percentage, symmetry/asymmetry of the plaque, and the stretch ratio can dramatically affect the buckling pressure. Buckling makes the plaque rupture (especially in asymmetric ones) more likely due to increasing the stresses on it. The dominant stresses on plaques are the circumferential, axial and radial ones, respectively. Also, the highest shear stresses on the plaques were detected in \theta -z and r-\theta planes for the symmetric and asymmetric stenotic arteries, respectively. In addition, the maximum circumferential stress on the plaques was observed in the outer point of the buckled configuration for symmetric and asymmetric stenosis as well as at the ends of the asymmetric plaque. Furthermore, the artery buckling caused a large vortex flow at the downstream of the plaque. As a result, the conditions for the penetration of lipid particles and the formation of new plaques were provided. Conclusion Buckling makes the plaque rupture more likely due to increasing the stresses on it especially in asymmetric plaques. In addition, the artery buckling provides the condition for the penetration of lipid particles and the formation of new plaques at the downstream of the plaque.

Fluid-Structure Interaction Applied to Blood Flow Simulations

2008 ◽  
pp. 253-271
Author(s):  
Eduardo Soudah ◽  
Eugenio Oñate ◽  
José García ◽  
Jorge S. Pérez ◽  
Andrés Mena ◽  
...  
Keyword(s):  
Blood Flow ◽  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Flow Simulations ◽  
Structure Interaction

Modeling of aortic valve stenosis using fluid-structure interaction method

Perfusion ◽  
2021 ◽  
pp. 026765912199854
Author(s):  
Mohammad Javad Ghasemi Pour ◽  
Kamran Hassani ◽  
Morteza Khayat ◽  
Shahram Etemadi Haghighi
Keyword(s):  
Blood Flow ◽  
Aortic Valve ◽  
Fluid Structure Interaction ◽  
Three Dimensional ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Relaxation Phase ◽  
Exercise Condition ◽  
Time Dependent Domain ◽  
Comparison Of The Results

Background and objectives: Fluid structure interaction (FSI) is defined as interaction of the structures with contacting fluids. The aortic valve experiences the interaction with blood flow in systolic phase. In this study, we have tried to predict the hemodynamics of blood flow through a normal and stenotic aortic valve in two relaxation and exercise conditions using a three-dimensional FSI method. Methods: The aorta valve was modeled as a three-dimensional geometry including a normal model and two others with 25% and 50% stenosis. The geometry of the aortic valve was extracted from CT images and the models were generated by MMIMCS software and then they were implemented in ANSYS software. The pulsatile flow rate was used for all cases and the numerical simulations were conducted based on a time-dependent domain. Results: The obtained results including the velocity, pressure, and shear stress contours in different systolic time sequences were explained and discussed. The maximum blood flow velocity in relaxation phase was obtained 1.62 m/s (normal valve), 3.78 m/s (25% stenosed valve), and 4.73 m/s (50% stenosed valve). In exercise condition, the maximum velocities are 2.86, 4.32, and 5.42 m/s respectively. The maximum blood pressure in relaxation phase was calculated 111.45 mmHg (normal), 148.66 mmHg (25% stenosed), and 164.21 mmHg (50% stenosed). However, the calculated values in exercise situation were 129.57, 163.58, and 191.26 mmHg. The validation of the predicted results was also conducted using existing literature. Conclusions: We believe that such model are useful tools for biomechanical experts. The further studies should be done using experimental data and the data are implemented on the boundary conditions for better comparison of the results.

PERSONALIZED FSI-MODELING OF THE AORTIC BULB AND ARCH TO PREDICT ITS MECHANICAL BEHAVIOR AND ASSESS THE LOADS DURING THE CARDIAC CYCLE

2021 ◽  
Vol 11 (2) ◽  
pp. 13-16
Author(s):  
Artur Ovsepyan ◽  
Alexander Smirnov ◽  
Sergey Dydykin ◽  
Yuriy Vasil'ev ◽  
Evgeniy Trunin ◽  
...  
Keyword(s):  
Blood Flow ◽  
Mechanical Behavior ◽  
Dynamic Model ◽  
Cardiac Cycle ◽  
Fluid Structure Interaction ◽  
Complex Dynamic ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Dynamic Event

The interaction of the blood flow with the aorta is a complex dynamic event described in biomechanics as the Fluid-structure interaction. In this study we’ve developed a method for creation of a personalized 3D dynamic model of the aortic bulb and arch for the prediction of its mechanical behavior using FSI-analysis. We found that the accuracy of predicting geometric aortic deformities based on FSI modeling is on average 92%.

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