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A parametric study regarding structural design of a bioprosthetic aortic valve by 3D fluid-structure interaction simulations

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HELIYON 2024年第6期10卷 e27310页

作者： Kim, Yongwoo Pyo, Won Kyung Kim, Wan Kee Suh, Ga-Young Kang, Keonwook Lee, Seung Hyun Yonsei Univ Dept Mech Engn Seoul South Korea Yonsei Univ Severance Hosp Coll Med Dept Thorac Cardiovasc Surg Seoul South Korea Yonsei Univ Yongin Severance Hosp Coll Med Dept Thorac & Cariovasc Surg Yongin Gyeonggi Do South Korea Calif State Univ Long Beach Dept Biomed Engn Long Beach CA 90840 USA

Since the introduction of transcatheter aortic valve (AV) implantation as a viable option, surgical bioprosthetic AVs have recently started incorporating shorter struts considering future valve -invalve procedures. However, the effect of leaflet coaptation geometry on the longevity of these valves remains unexplored. To address this gap, we performed a finite element analysis on bioprosthetic AVs with varying strut heights using a two-way fluid-structure interaction method. To establish a baseline, we used a standard height based on a rendered platform image of the CE PERIMOUNT Magna Ease valve from Edward Lifesciences in Irvine, CA. Bovine pericardium properties were assigned to the leaflets, while normal saline properties were used as the recirculating fluid in hemodynamic simulations. The physiological pressure profile of the cardiac cycle was applied between the aorta and left ventricle. We calculated blood flow velocity, effective orifice area (EOA), and mechanical stress on the leaflets. The results reveal that as the strut height increases, the stroke volume increases, leakage volume decreases, and EOA improves. Additionally, the maximum mechanical stress experienced by the leaflet decreases by 62% as the strut height increases to 1.2 times the standard height. This research highlights that a low-strut design in bioprosthetic AVs may negatively affect their durability, which can be useful in design of nextgeneration bioprosthetic AVs.

关键词： Aortic valve fluid-structure interaction Hemodynamics Biomechanics

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fluid-structure interaction ANALYSIS OF A PERISTALTIC PUMP BY USING NUMERICAL AND EXPERIMENTAL METHODS

FLUID-STRUCTURE INTERACTION ANALYSIS OF A PERISTALTIC PUMP B...

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ASME Pressure Vessels and Piping Conference (PVP)

作者： Li, Qingye Zong, Chaoyong Zhang, Jianhua Zhang, Yanfeng Songa, Xueguan Dalian Univ Technol Sch Mech Engn Dalian 116023 Peoples R China Baoding Lead Fluid Technol Co Ltd Baoding 071000 Peoples R China Hebei Prov Fluid Precis Transmiss Technol Innovat Shijiazhuang Hebei Peoples R China

ISBN: (纸本)9780791886168

Peristaltic pump is an important transport device which is widely used in industries involving pharmaceutical, petrochemical, biomedical, and food processing. For designed and/or optimized purpose, it is necessary to have a thorough understanding the mechanism of its dynamics. For this purpose, both numerical and experimental investigations have been performed in this paper. In the numerical study, a numerical model concerning two-way fluid-structure interaction (FSI) phenomenon is developed, where the Mooney-Rivlin hyper-elasticity model and dynamic mesh technique are employed to simulate a complete operating period of a peristaltic pump. For model verification, a series of experimental tests are performed and the results of the simulation and the tests were compared, which showed a good agreement. With the validated model, a detailed velocity and pressure distribution of a working period of the peristaltic pump is obtained, the mass flow rate is analyzed to illustrate the mechanism of the flow fluctuations.

关键词： fluid-structure interaction peristaltic pump numerical simulation hyper-elasticity model computational fluid dynamics

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Port-Hamiltonian fluid-structure interaction modelling and structure-preserving model order reduction of a classical guitar

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MATHEMATICAL AND COMPUTER MODELLING OF DYNAMICAL SYSTEMS 2023年第1期29卷 116-148页

作者： Rettberg, Johannes Wittwar, Dominik Buchfink, Patrick Brauchler, Alexander Ziegler, Pascal Fehr, Joerg Haasdonk, Bernard Univ Stuttgart Inst Engn & Computat Mech Stuttgart Germany Univ Stuttgart Inst Appl Anal & Numer Simulat Stuttgart Germany

A fluid-structure interaction model in a port-Hamiltonian representation is derived for a classical guitar. After discretization, we combine the laws of continuum mechanics for solids and fluids within a unified port-Hamiltonian (pH) modelling approach by adapting the equations through an appropriate coordinate transformation on the second-order level. The high-dimensionality of the resulting system is reduced by model order reduction. The article focuses on pH-systems in different state transformations, a variety of basis generation techniques as well as structure-preserving model order reduction approaches that are independent from the projection basis. As main contribution, a thorough comparison of these method combinations is conducted. In contrast to typical frequency-based simulations in acoustics, transient time simulations of the system are presented. The approach is embedded into a straightforward workflow of sophisticated commercial software modelling and flexible in-house software for multi-physics coupling and model order reduction.

关键词： structure-preserving model order reduction port-Hamiltonian systems fluid-structure interaction classical guitar

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Comparative Study of fluid-structure interaction Approaches for High Aspect Ratio Wing Applications

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JOURNAL OF AERONAUTICS ASTRONAUTICS AND AVIATION 2024年第1期56卷 267-277页

作者： Nazri, Ainaa Nabilah Mohd Nordin, Norzaima Bohari, Baizura Harmin, Mohammad Yazdi Othman, Maidiana Univ Pertahanan Nas Malaysia Dept Mech Engn Fac Engn Kuala Lumpur 57000 Malaysia Univ Pertahanan Nas Malaysia Fac Engn Dept Aeronaut Engn & Aviat Kuala Lumpur 57000 Malaysia Univ Putra Malaysia Fac Engn Dept Aerosp Engn Serdang 43400 Selangor Malaysia Univ Pertahanan Nas Malaysia Fac Engn Dept Civil Engn Kuala Lumpur 57000 Malaysia

In recent years, utilization of high aspect ratio (HAR) wings, particularly for high altitude long endurance (HALE) applications, has significantly increased. HAR wings play a crucial role in reducing the induced drag and also enhancing fuel efficiency. Nonetheless, HAR wings exhibit complex geometrical nonlinear behavior, posing challenges for optimal aircraft design. Traditionally, researchers have explored methods to analyze the geometrical nonlinearities through the fluid -structure interaction (FSI) analysis. However, most works for this area are predominantly focused on low aspect ratio wings, neglecting the complexities associated with HAR wings. Consequently, a critical research gap exists in understanding the unique challenges posed by HAR wings in the context of FSI analysis. This study addresses this gap by evaluating the effectiveness of FSI approaches (either using one-way or twoway) in the context of HAR wings using the ANSYS software. Comparative analyses between experimental and simulation results are conducted to verify the computational efficiency of both methods. The results have revealed that two-way FSI analysis closely approximates the experimental data, showing a maximum percentage error of 3.61% at an effective angle of attack of 1 degrees and airspeed of 22.5 m/s. Nevertheless, it is important to note that two-way FSI analysis demands significantly more computational time compared to its oneway counterpart. Therefore, for straightforward cases involving HAR wing deformations, one-way FSI analysis is already sufficient to offer efficient and accurate results.

关键词： fluid-structure interaction High aspect ratio wing Geometrical nonlinear ANSYS software

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SPH-based framework for modelling fluid-structure interaction problems with finite deformation and fracturing

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OCEAN ENGINEERING 2024年 294卷

作者： Islam, Md Rushdie Ibne Indian Inst Technol Delhi Dept Appl Mech New Delhi 110016 India

Understanding crack propagation in structures subjected to fluid loads is crucial in various engineering applications, ranging from underwater pipelines to aircraft components. In this work, a computational framework is proposed to investigate the dynamic response of structures, including their damage and fracture behaviour under hydrodynamic load. The proposed framework employs weakly compressible smoothed particle hydrodynamics (SPH) to model the fluid flow and a pseudo-spring-based SPH solver for modelling the structural response. The delta-SPH technique is implemented to enhance pressure calculations within the fluid phase. The pseudo-spring analogy is employed for modelling damage, where particle interactions are confined to their immediate neighbours. These particles are linked by springs, which do not contribute to system stiffness but determine the interaction strength between connected pairs. It is assumed that a crack propagates through a spring connecting a particle pair when the damage indicator of that spring exceeds a predefined threshold. The proposed framework is extensively validated through existing experimental and numerical data from the literature. The ability of the framework to accurately depict large material deformation, damage and fracture behaviour under hydrodynamic loads is showcased through a few numerical simulations.

关键词： Smoothed particle hydrodynamics fluid-structure interaction Material damage and fracture Pseudo-spring analogy

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Breakage risk analysis during the glass tempering process based on fluid-structure interaction approach

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GLASS structureS & ENGINEERING 2024年第3-4期9卷 455-469页

作者： Iglesias, A. Martinez-Agirre, M. Llavori, I. Esnaola, J. A. Mondragon Unibertsitatea Loramendi Fluid Mech Arrasate Mondragon 20500 Spain Mondragon Unibertsitatea Struct Mech & Design Loramendi Arrasate Mondragon 20500 Spain

In recent decades, there has been a perceptible transformation in how glass is perceived, evolving from being used for its aesthetic appeal to being acknowledged for its structural capabilities. Structural glass components are most often heat treated to increase their ultimate strength. For this purpose, the tempering process is applied. In this context, air is the quintessential cooling technique employed to rapidly cool and fortify the material due to its associated low cost. Nevertheless, it may encounter certain limitations when quenching low thickness components, making other techniques, such as spray mist cooling, to gain traction. Additionally, glass is a very brittle and sensitive material to local stress concentrations. Thus, depending on how the tempering process is performed, an excessive and/or non-homogeneous cooling might result in local transient stresses, which may exceed the allowable strength and cause premature fracture of the material. To this end, the non-uniform transient stress development during glass tempering is studied based on fluid-structure interaction modelling. In this way, the risk of in-process breakage considering the local phenomena during the glass cooling process is assessed. Water mist cooling is able to temper thin glass but, at the same time, large tensile stresses might develop during the cooling down process. This fact fosters the adoption of an interrupt tempering technique. The obtained numerical results are consistent with previous experimental investigations available in the literature.

关键词： Glass tempering Risk of fracture Mist cooling Residual stresses fluid-structure interaction

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Exploiting high-contrast Stokes preconditioners to efficiently solve incompressible fluid-structure interaction problems

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INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING 2023年第24期124卷 5446-5470页

作者： Wichrowski, Michal Krzyzanowski, Piotr Heltai, Luca Stupkiewicz, Stanislaw Heidelberg Univ Interdisciplinary Ctr Sci Comp Heidelberg Germany Univ Warsaw Fac Math Informat & Mech Warsaw Poland SISSA Int Sch Adv Studies Math Area Trieste Italy Polish Acad Sci Inst Fundamental Technol Res Warsaw Poland Heidelberg Univ Interdisciplinary Ctr Sci Comp Neuenheimer Feld 205 D-69120 Heidelberg Germany

In this work, we develop a new algorithm to solve large-scale incompressible time-dependent fluid-structure interaction problems using a matrix-free finite element method in arbitrary Lagrangian-Eulerian frame of reference. We derive a semi-implicit time integration scheme which improves the geometry-convective explicit scheme for problems involving the interaction between incompressible hyperelastic solids and incompressible fluids. The proposed algorithm relies on the reformulation of the time-discrete problem as a generalized Stokes problem with strongly variable coefficients, for which optimal preconditioners have recently been developed. The resulting algorithm is scalable, optimal, and robust: we test our implementation on model problems that mimic classical Turek-Hron benchmarks in two and three dimensions, and investigate timing and scalability results.

关键词： arbitrary Lagrangian-Eulerian finite element method fluid-structure interaction geometric multigrid matrix-free method monolithic scheme

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Finite Element and fluid-structure interaction Modeling of a Balloon Catheter

IEEE TRANSACTIONS ON MEDICAL ROBOTICS AND BIONICS

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IEEE TRANSACTIONS ON MEDICAL ROBOTICS AND BIONICS 2024年第1期6卷 68-72页

作者： Yao, Junke Salmonsmith, Jacob Bosi, Giorgia Maria Burriesci, Gaetano Wurdemann, Helge UCL Dept Mech Engn London WC1E 6BT England Ri MED Fdn Dept Bioengn I-90133 Palermo Italy

Intervention treatments for aortic stenosis strongly rely on the use of a medical balloon catheter which is utilized for dilating the narrowed aortic valve or the deployment of the implanted devices. However, the complete inflation of the balloon will block the blood outflow and cause instability. This paper demonstrates a computational analysis method to examine the influence of the amount of balloon inflation volume on balloon movement within a pulsating fluid environment. A tri-folded typical shape of the balloon model was inflated by pressurization. The balloon's front projection area changes during both simulation and experiment were recorded. To address the interaction between the balloon model with varying inflation levels and the introduction of fluid into the arched aorta, a fluid-structure interaction (FSI) model was developed. Compared with the experimental data, the front projection area in the simulation showed a similar increment, which can be used to validate the balloon model. For FSI simulation, the balloon catheter's maximum displacement rises with the inflation level, with a slight rise at about 10 ml and a substantial rise at 20 ml volume. This work showed a significant advancement in the ability to replicate balloon movement during valvuloplasty using an FSI model.

关键词： Catheters fluids Finite element analysis Numerical models Valves Computational modeling Medical robotics Valvuloplasty balloon catheters fluid-structure interaction finite element analysis

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A coupled high-accuracy phase-field fluid-structure interaction framework for Stokes fluid-filled fracture surrounded by an elastic medium

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RESULTS IN APPLIED MATHEMATICS 2024年 22卷

作者： von Wahl, Henry Wick, Thomas Univ Vienna Fac Math Oskar Morgenstern Pl 1 A-1090 Vienna Austria Friedrich Schiller Univ Jena Inst Math Ernst Abbe Pl 2 D-07743 Jena Germany Leibniz Univ Hannover Inst Appl Math Welfengarten 1 D-30167 Hannover Germany

In this work, we couple a high-accuracy phase-field fracture reconstruction approach iteratively to fluid-structure interaction. The key motivation is to utilise phase-field modelling to compute the fracture path. A mesh reconstruction allows a switch from interface-capturing to interface- tracking in which the coupling conditions can be realised in a highly accurate fashion. Consequently, inside the fracture, a Stokes flow can be modelled that is coupled to the surrounding elastic medium. A fully coupled approach is obtained by iterating between the phase-field and the fluid-structure interaction model. The resulting algorithm is demonstrated for several numerical examples of quasi-static brittle fractures. We consider both stationary and quasi-stationary problems. In the latter, the dynamics arise through an incrementally increasing given pressure.

关键词： Phase-field fracture fluid-structure interaction Interface reconstructions Finite elements Sneddon's benchmark

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Integrated particle image velocimetry and fluid-structure interaction analysis for patient-specific abdominal aortic aneurysm studies

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BIOMEDICAL ENGINEERING ONLINE 2023年第1期22卷 1-19页

作者： Ozcan, Can Kocaturk, Ozgur Islak, Civan Ozturk, Cengizhan Bogazici Univ Inst Biomed Engn Kandilli CampusFeza Gursey BldCengelkoy TR-34684 Istanbul Turkiye Istanbul Univ Cerrahpasa Cerrahpasa Med Fac Dept Radiol Div Neuroradiol Istanbul Turkiye

BackgroundUnderstanding the hemodynamics of an abdominal aortic aneurysm (AAA) is crucial for risk assessment and treatment planning. This study introduces a low-cost, patient-specific in vitro AAA model to investigate hemodynamics using particle image velocimetry (PIV) and flow-simulating circuit, validated through fluid-structure interaction (FSI) *** this study, 3D printing was employed to manufacture a flexible patient-specific AAA phantom using a lost-core casting technique. A pulsatile flow circuit was constructed using off-the-shelf components. A particle image velocimetry (PIV) setup was built using an affordable laser source and global shutter camera, and finally, the flow field inside the AAA was analyzed using open-source software. fluid-structure interaction (FSI) simulations were performed to enhance our understanding of the flow field, and the results were validated by PIV analysis. Both steady-state and transient flow conditions were *** experimental setup replicated physiological conditions, analyzing arterial wall deformations and flow characteristics within the aneurysm. Under constant flow, peak wall deformations and flow velocities showed deviations within - 12% to + 27% and - 7% to + 5%, respectively, compared to FSI simulations. Pulsatile flow conditions further demonstrated a strong correlation (Pearson coefficient 0.85) in flow velocities and vectors throughout the cardiac cycle. Transient phenomena, particularly the formation and progression of vortex structures during systole, were consistently depicted between experimental and numerical *** bridging high-fidelity experimental observations with comprehensive computational analyses, this study underscores the potential of integrated methodologies in enhancing our understanding of AAA pathophysiology. The convergence of realistic AAA phantoms, precise PIV measurements at affordable cost point, and validated FSI models heralds a new paradi

关键词： Particle image velocimetry fluid-structure interaction 3D printing AAA

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