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An analysis of fluid-structure interaction coupling mechanisms in liquid-filled viscoelastic pipes subject to fast transients

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JOURNAL OF fluidS AND structureS 2023年第1期121卷

作者： Andrade, Douglas Monteiro Rachid, Felipe Bastos de Freitas Tijsseling, Arris Sieno Univ Fed Fluminense Dept Mech Engn TEM Grad Program Mech Engn PGMEC Rua Passo Patria 156 BR-24210240 Niteroi RJ Brazil Eindhoven Univ Technol Dept Math & Comp Sci Eindhoven Netherlands

An extension of a recently developed quasi-2D flow model for fluid transients in viscoelastic pipes to handle fluid-structure interaction mechanisms is presented. In a context in which the fluid flow is devised as a structured pseudo-mixture and the pipe's viscoelasticity is rooted in an internal variable theory, the axial movement of the pipe wall is allowed to occur, giving rise to friction, Poisson, and junction coupling mechanisms. The resulting governing equations of the model form a quasi-linear hyperbolic system of partial differential equations, which approximated solution is achieved by means of the method of characteristics. The proposed approach is validated against pressure traces acquired from a reservoir-pipe-valve experimental setup found in the literature. In the course of the validating process, different pipe anchoring conditions are employed to study the system responses. Focus is given to pipe-fluid interface interactions, energy dissipation, and transfer of energy between both media. (c) 2023 Elsevier Ltd. All rights reserved.

关键词： Unsteady flow fluid transient fluid-structure interaction Viscoelastic pipe Energy dissipation

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A fast calculation method for the optimal clearance and stiffness of the aerostatic guideway considering fluid-structure interaction

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TRIBOLOGY INTERNATIONAL 2023年 183卷

作者： Qi, Lizi Zhu, Min Gao, Qiang Xu, Jingfeng Liu, Liang Wei, Wenyuan Lu, Lihua Harbin Inst Technol Sch Mechatron Engn Harbin Peoples R China Harbin Inst Technol Sch Elect Engn & Automat Harbin Peoples R China Chongqing Res Inst HIT Chongqing Peoples R China

The static performances of the aerostatic spindles/guideways are significantly affected by the fluid-structure interaction (FSI) effect. However, the existing two-way FSI calculation method for the aerostatic spindles and guideways is inefficient. It takes much time to calculate the optimal parameters and static performance in the design and study process. This paper proposes a fast calculation method for the optimal clearance and stiffness of the aerostatic guideway considering FSI, and the calculation process of a cruciform-layout aerostatic guideway was detailed as a case study. Moreover, the accuracy of the proposed fast calculation method is verified numerically and experimentally, which proves that the computational efficiency can be improved dozens or even hundreds of times under the premise of minor calculation errors.

关键词： Aerostatic guideway Optimal clearance and stiffness Fast calculation method fluid-structure interaction

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fluid-structure interaction and stress analysis of a floating wind turbine

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MARINE structureS 2021年 78卷 102970-102970页

作者： Wiegard, B. Konig, M. Lund, J. Radtke, L. Netzband, S. Abdel-Maksoud, M. Duester, A. Hamburg Univ Technol TUHH Inst Ship Struct Design & Anal Schwarzenberg Campus 4 C D-21073 Hamburg Germany Hamburg Univ Technol TUHH Inst Fluid Dynam & Ship Theory Schwarzenberg Campus 4 C D-21073 Hamburg Germany

In this paper, we describe a method to investigate the fluid-structure interaction of a floating wind turbine and to analyze the global deformations and the corresponding stresses with a detailed finite element model. To solve the fluid-structure interaction problem, a partitioned approach is chosen. The in-house C++ library comana, which was developed to solve multi-physic problems by coupling existing solvers, is extended to couple the fluid solver panMARE and the structural solver ANSYS. The significance of the interaction of structural deformations and the fluid loads is pointed out for the rotor of the wind turbine. In order to enable the use of a detailed finite element model in the fluid-structure interaction simulation, a model reduction method is applied in ANSYS. As a result, an efficient stress analysis can be performed under consideration of the fluidstructure interaction.

关键词： fluid-structure interaction Stress analysis Self-aligning floating wind turbine Partitioned solution approach Superelement

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fluid-structure interaction modeling of lactating breast: Newtonian vs. non-Newtonian milk

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JOURNAL OF BIOMECHANICS 2021年 124卷 110500-110500页

作者： Azarnoosh, Jamasp Hassanipour, Fatemeh Univ Texas Dallas Dept Mech Engn 800 W Campbell Rd Richardson TX 75080 USA

Breastfeeding is a highly dynamic and complex mechanism. The suckling process by the infant involves compression and intra-oral vacuum pressure, leading to milk expression from breast. The accumulated milk from the nipple varies depending on the milk properties and transient flow rate during the suckling cycle. Rheological studies on raw human milk indicate that milk has a non-Newtonian shear-thinning flow behavior. This study aims to investigate the effect of non-Newtonian milk on flow behavior through the breast ductal system using fluid-structure interaction (FSI) simulation. The results of the non Newtonian effects on flow velocity and the volumetric flow rate of expressed milk are presented. The results show that non-Newtonian Carreau model is promising for the simulation of human milk flow through the breast ductal systems. Also, the results show that the non-Newtonian effects on the milk flow behavior appear for 30-35% of the suckling cycle. Therefore, the Newtonian model is acceptable for the purpose of numerical simulation. (c) 2021 Elsevier Ltd. All rights reserved.

关键词： Non-Newtonian fluid Human milk Computational fluid dynamics fluid-structure interaction

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fluid-structure interaction analysis of coriolis mass flowmeter

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INTERNATIONAL JOURNAL OF MODERN PHYSICS B 2020年第14-16期34卷

作者： Huang, Tian-Xing Reny, Jian-Xin Zhangz, Pei Northwestern Polytech Univ Sch Automat Xian Peoples R China

Coriolis mass flowmeter (CMF) is widely used in the industrial field. In mass flow measurement, there are many impurities in measured fluids that will adhere to the inner wall of the vibrating tube of CMF. The vibration characteristics of CMF would change due to the structural change, i.e., wall clung state, which will generate the wall clung state fault. In this paper, aiming at the wall clung state fault of CMF, the finite element model of CMF is established based on ANSYS. The velocity distribution of fluid in the vibrating tube of CMF is analyzed, considering the fluid{structure interaction. The location of the wall clung state in a vibrating tube is determined. Then, the fault model is established. The mechanism of the vibration transmission characteristics outwards of CMF caused by the wall clung state is analyzed by harmonic response analysis. Finally, the failure mode of CMF is investigated.

关键词： ANSYS Coriolis mass flowmeter fluid-structure interaction transmitted vibration harmonic response failure analysis

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Unraveling aortic hemodynamics using fluid structure interaction: biomechanical insights into bicuspid aortic valve dynamics with multiple aortic lesions

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BIOMECHANICS AND MODELING IN MECHANOBIOLOGY 2025年第1期24卷 17-27页

作者： Govindarajan, Vijay Wanna, Charles Johnson, Nils P. Kolanjiyil, Arun V. Kim, Hyunggun Kitkungvan, Danai Mcpherson, David M. Grande-Allen, Jane Chandran, Krishnan B. Estrera, Antony Ramzy, Danny Prakash, Siddharth Univ Texas Hlth Sci Ctr Houston McGovern Med Sch Dept Internal Med Div Cardiol 1881 East Rd Houston TX 77054 USA Boston Childrens Hosp Boston MA 02115 USA Harvard Med Sch Boston MA 02115 USA Virginia Commonwealth Univ Richmond VA USA Sungkyunkwan Univ Suwon Gyeonggi Do South Korea Rice Univ Houston TX USA Univ Iowa Iowa City IA USA

Aortic lesions, exemplified by bicuspid aortic valves (BAVs), can complicate congenital heart defects, particularly in Turner syndrome patients. The combination of BAV, dilated ascending aorta, and an elongated aortic arch presents complex hemodynamics, requiring detailed analysis for tailored treatment strategies. While current clinical decision-making relies on imaging modalities offering limited biomechanical insights, integrating high-performance computing and fluid-structure interaction algorithms with patient data enables comprehensive evaluation of diseased anatomy and planned intervention. In this study, a patient-specific workflow was utilized to biomechanically assess a Turner syndrome patient's BAV, dilated ascending aorta, and elongated arch. Results showed significant improvements in valve function (effective orifice area, EOA increased approximately twofold) and reduction in valve stress (similar to 1.8-fold) following virtual commissurotomy, leading to enhanced flow dynamics and decreased viscous dissipation (similar to twofold) particularly in the ascending aorta. However, increased viscous dissipation in the distal transverse aortic arch offset its local reduction in the AAo post-intervention, emphasizing the elongated arch's role in aortic hemodynamics. Our findings highlight the importance of comprehensive biomechanical evaluation and integrating patient-specific modeling with conventional imaging techniques for improved disease assessment, risk stratification, and treatment planning, ultimately enhancing patient outcomes.

关键词： Bicuspid aortic valve Dilated aorta Elongated arch fluid-structure interaction Aortic hemodynamics Valve deformation

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Failure investigation and stresses in abdominal aortic aneurysms fluid-structure interaction biomechanics: Effect of nonlinear material properties and presence of intraluminal thrombus

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Procedia Structural Integrity 2023年 45卷 88-95页

作者： Xiaochen Wang Mergen H. Ghayesh Andrei Kotousov Anthony C. Zander Peter J. Psaltis School of Electrical and Mechanical Engineering University of Adelaide Adelaide SA 5005 Australia Vascular Research Centre Lifelong Health Theme South Australian Health & Medical Research Institute (SAHMRI) Adelaide SA 5000 Australia Adelaide Medical School University of Adelaide Adelaide SA 5005 Australia

Abdominal aortic aneurysm (AAA) rupture has become a prevalent cause of death and is responsible for approximately 200,000 deaths annually worldwide. Due to the fact that abdominal aortic aneurysms are permanent progressive dilatations and asymptomatic until rupture, there is a rising need to study the characteristics of the mechanics of disease so that it can be recognised earlier on, thus preventing the patients from risks. This paper analyses the relationship between the nonlinear material hyperelasticity variability and the presence of intraluminal thrombosis (ILT) in a biomechanical computational model of an abdominal aortic aneurysm via the fluid-structure interaction technique. Current clinical interventions of AAA highly rely on the aneurysm size; however, evidence has shown that many small lesions rupture. One possible cause of this phenomenon is ILT, as in over 70% of patients with AAA, ILT can be found and presented irregular covered on the intimal side of AAA. Moreover, the embedded fibres in the artery wall exhibit anisotropy, and neglecting fibre dispersion can oversimplify the results of AAA modelling. The biomechanical model presented in this work takes into account viscoelastic artery wall, pulsatile fluid velocity and pressure, non-Newtonian behaviour of blood, and interaction between the blood and the artery wall. The impact on wall stresses, deformation and flow patterns are focused and compared to conduct this sensitivity analysis of numerical prediction. The results demonstrate that the presence of an ILT significantly affects the risk of rupture and the variability of the material hyperelasticity

关键词： abdominal aortic aneurysm biomechanics finite element analysis fluid-structure interaction intraluminal thrombus sensitivity study rupture risks failure investigation

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fluid-structure interaction Modeling of Elastohydrodynamically Lubricated Line Contacts

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JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME 2021年第9期143卷 091602-091602页

作者： Singh, Kushagra Sadeghi, Farshid Russell, Thomas Lorenz, Steven J. Peterson, Wyatt Villarreal, Jaret Jinmon, Takumi School of Mechanical Engineering Purdue University West Lafayette IN 47907 Cummins Distinguished Professor of Mechanical Engineering School of Mechanical Engineering Purdue University West Lafayette IN 47907 Toyota Motor North America R&D 1555 Woodridge Avenue Ann Arbor MI 48105 Toyota Motor North America R&D 1555 Woodridge Avenue Ann Arbor MI 48105

This paper presents a partitioned fluid-structure interaction (FSI) solver to model elastohydrodynamic lubrication (EHL) of line contacts. The FSI model was constructed using the multiphysics simulation software ansys, wherein an iterative implicit coupling scheme is implemented to facilitate the interaction between fluid and solid components. The model uses a finite volume method (FVM) based computational fluid dynamics (CFD) solver to determine the lubricant flow behavior using the Navier-Stokes equations. Additionally, the finite element method (FEM) is utilized to model the structural response of the solid. fluid cavitation, compressibility, non-Newtonian lubricant rheology, load balance algorithm, and dynamic meshing were incorporated in the FSI model. The pressure and film thickness results obtained from the model are presented for a wide range of loads, speeds, slide to roll ratios (SRR), surface dent, material properties (elastic plastic), etc. The model presents a detailed understanding of EHL contacts by removing any assumptions relative to the Reynolds equation. It provides the (i) two-dimensional variation of pressure, viscosity, etc., in the fluid and (ii) stress, elastic/plastic strain in the solid, simultaneously. The FSI model is robust, easy to implement, and computationally efficient. It provides an effective approach to solve sophisticated EHL problems. The FSI model was used to investigate the effects of surface dents, plasticity and material inclusions under heavily loaded lubricated line contacts as can be found in gears and rolling element bearings. The results from the model exhibit excellent corroboration with published results based on the Reynolds equation solvers.

关键词： fluid-structure interaction elastohydrodynamic lubrication gears rolling element bearings CFD rolling contact fatigue bearings

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The Effect of Subglottic Stenosis Severity on Vocal Fold Vibration and Voice Production in Realistic Laryngeal and Airway Geometries Using fluid-structure-Acoustics interaction Simulation

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APPLIED SCIENCES-BASEL 2025年第3期15卷 1168-1168页

作者： Bodaghi, Dariush Xue, Qian Thomson, Scott Zheng, Xudong Univ Maine Dept Mech Engn Orono ME 04473 USA Rochester Inst Technol Dept Mech Engn Rochester NY 14623 USA Brigham Young Univ Idaho Dept Mech & Civil Engn Rexburg ID 83460 USA

This study investigates the impact of subglottic stenosis (SGS) on voice production using a subject-specific laryngeal and airway model. Direct numerical simulations of fluid-structure-acoustic interaction were employed to analyze glottal flow dynamics, vocal fold vibration, and acoustics under realistic conditions. The model accurately captured key physiological parameters, including the glottal flow rate, vocal fold vibration patterns, and the first four formant frequencies. Simulations of varying SGS severity revealed that up to 75% stenosis, vocal function remains largely unaffected. However, at 90% severity, significant changes in glottal flow and acoustics were observed, with vocal fold vibration remaining stable. At 96%, severe reductions in glottal flow and acoustics, along with marked changes in vocal fold dynamics, were detected. Flow resistance, the ratio of glottal to stenosis area, and pressure drop across the vocal folds were identified as critical factors influencing these changes. The use of anatomically realistic airway and vocal fold geometries revealed that while anatomical variations minimally affect voice production at lower stenosis grades, they become critical at severe stenosis levels (>90%), particularly in capturing distinct anterior-posterior opening patterns and focused jet effects that alter glottal dynamics. These findings suggest that while simplified models suffice for analyzing mild to moderate stenosis, patient-specific geometric details are essential for accurate prediction of vocal fold dynamics in severe cases.

关键词： subglottic stenosis voice production subject-specific simulation fluid-structure interaction

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fluid-structure interaction of Circular Cylinder Flow with Bidirectional Splitter Plates

Fluid-Structure Interaction of Circular Cylinder Flow with B...

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Global OCEANS Singapore - U.S. Gulf Coast Conference

作者： Dang, Zhigao Mao, Zhaoyong Song, Baowei Tian, Wenlong Northwestern Polytech Univ Sch Marine Sci & Technol Xian Peoples R China

ISBN: (纸本)9781728154466

Flow past a circular cylinder is a classical topic in ocean engineering application, such as the marine riser, oil pipeline, etc. When the ocean current flows around cylinder structures, shedding vortices will appear alternately in the wake of the cylinder at a certain Reynolds number, which is harmful to the service life of ocean engineering structures. Among the abundant active and passive methods of flow control, the splitter plate behind the circular cylinder is a popular choice to improve the flow field of the circular cylinder. It should be noted that the motions of the splitter plate are neglected because most of the present studies treat the splitter plate as rigid body. Therefore, the fluid-structure interaction (FSI) effect between the fluid and the splitter plate is taken into account in the present study. What's more, a new idea with bidirectional splitter plates are proposed to improve the flow field with beneficial effects. Correspondingly, the relationships between the ratios of RMS lift and mean drag coefficients by original circular cylinder with different configurations of the splitter plate are given.

关键词： circular cylinder fluid-structure interaction splitter plate lift drag

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