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fluid-structure interaction in water-filled thin pipes of anisotropic composite materials

JOURNAL OF fluidS AND structureS 2013年 36卷 162-173页

作者： You, Jeong Ho Inaba, K. CALTECH Div Engn & Appl Sci Pasadena CA 91125 USA Tokyo Inst Technol Dept Sci & Engn Meguro Ku Tokyo 1528550 Japan

The effects of elastic anisotropy in piping materials on fluid-structure interaction are studied for water-filled carbon-fiber reinforced thin plastic pipes. When an impact is introduced to water in a pipe, there are two waves traveling at different speeds. A primary wave corresponding to a breathing mode of pipe travels slowly and a precursor wave corresponding to a longitudinal mode of pipe travels fast. An anisotropic stress-strain relationship of piping materials has been taken into account to describe the propagation of primary and precursor waves in the carbon-fiber reinforced thin plastic pipes. The wave speeds and strains in the axial and hoop directions are calculated as a function of carbon-fiber winding angles and compared with the experimental data. As the winding angle increases, the primary wave speed increases due to the increased stiffness in the hoop direction, while the precursor wave speed decreases. The magnitudes of precursor waves are much smaller than those of primary waves so that the effect of precursor waves on the deformation of pipe is not significant. The primary wave generates the hoop strain accompanying the opposite-signed axial strain through the coupling compliance of pipe. The magnitude of hoop strain induced by the primary waves decreases with increasing the winding angle due to the increased hoop stiffness of pipe. The magnitude of axial strain is small at low and high winding angles where the coupling compliance is small. (C) 2012 Elsevier Ltd. All rights reserved.

关键词： fluid-structure interaction Anisotropic piping materials Carbon-fiber reinforced thin plastic tube

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fluid-structure interaction of quasi-one-dimensional potential flow along channel bounded by symmetric cantilever beams

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JOURNAL OF fluidS AND structureS 2013年 40卷 127-147页

作者： Jang, Gang-Won Chang, Se-Myong Gim, Gyun-Ho Sejong Univ Fac Mech & Aerosp Engn Seoul 143747 South Korea Kunsan Natl Univ Sch Mech & Automot Engn Kunsan 573701 Jeonbuk South Korea

An analysis of fluid-structure interaction is presented for incompressible and inviscid flow in a channel bounded by symmetric cantilever beams. Small deflections of the beams and no flows normal to the beams are assumed, thus allowing the governing equations to be defined using quasi-one-dimensional pressure and flow velocity distribution;pressure and velocity are assumed to be uniform across the cross section of the channel. The steady-state solution of the present problem is analytically derived by the linearization of the governing equations. The solution is shown to consist of infinite modes, which is verified by comparing with numerical solutions obtained by the finite element method. The nonlinear effect in the steady-state solution is modeled by numerical method to estimate the error due to linearization. However, only a few leading modes are physically significant owing to the effects of flow compressibility and viscosity. The analytic solutions of the fluid-structure interaction are also presented for dynamic problems assuming harmonic vibration. The steady-state and stationary initial conditions are used, and the equilibrium frequency is determined to minimize the residual error of Euler equation. The fluid-structure interaction is characterized by a phase difference and distortion of waveform shape in the time history of the boundary velocity. (C) 2013 Elsevier Ltd. All rights reserved.

关键词： fluid-structure interaction Potential flow Inviscid flow Incompressible flow Channel Cantilever beam

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fluid-structure interaction for the propulsive velocity of a flapping flexible plate at low Reynolds number

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COMPUTERS & fluidS 2013年 71卷 348-374页

作者： Lee, JiSeok Lee, SangHwan Hanyang Univ Dept Mech Engn Seoul 133791 South Korea

This paper presents computational analysis of a fluid-structure interaction for a flapping flexible plate moved with propulsive velocity in quiescent fluid to investigate the effect of flexibility on propulsive velocity, which is critical for fish, birds, insects, and micro air vehicles with flapping wings. This study found that the mechanism of the flapping plate moved with propulsive velocity differs from that of the plate fixed in the propulsive direction, and the flexibility of the plate improves the propulsive velocity to create an optimal propulsion. The lattice Boltzmann method with an immersed boundary technique using a direct forcing scheme is used to simulate the fluid, while the finite element method with Euler beam elements is used to model structural deformation of the flexible plate. We developed the moving domain scheme to reversely move the domain at the velocity of the plate to simulate the moving plate. (c) 2012 Elsevier Ltd. All rights reserved.

关键词： fluid-structure interaction Flapping flexible plate Propulsive velocity Lattice Boltzmann method Finite element method

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Nonlinear Internal fluid structure interaction by Finite Volume Methods in Both Domains

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INTERNATIONAL JOURNAL FOR COMPUTATIONAL METHODS IN ENGINEERING SCIENCE & MECHANICS 2015年第2期16卷 86-97页

作者： Moosavi, M. R. Khelil, A. Univ Minho Inst Polymers & Composites Guimaraes Portugal Univ Lorraine Nancy Villers Les Nan France

The present work aims to address the nonlinear problem of internal fluid-structure interaction using a finite volume approach in both the fluid and solid domains. The Navier-Stokes equations are applied on the fluid domain and the nonlinear elastodynamic equations are used for the deforming solid domain. The method has been verified in the fluid, solid, and coupled domain separately. The results show a good performance by the method to solve coupled problems in internal fluid-structure interaction.

关键词： fluid-structure interaction Navier-Stokes Elastodynamics Large Deformation Internal Flow

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fluid-structure interactions of peripheral arteries using a coupled in silico and in vitro approach

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COMPUTERS IN BIOLOGY AND MEDICINE 2023年 165卷 107474-107474页

作者： Schoenborn, S. Lorenz, T. Kuo, K. Fletcher, D. F. Woodruff, M. A. Pirola, S. Allenby, M. C. Univ Queensland UQ Sch Chem Engn BioMimet Syst Engn BMSE Lab St Lucia Qld 4072 Australia Queensland Univ Technol QUT Fac Engn Ctr Biomed Technol Biofabricat & Tissue Morphol BTM Grp Kelvin Grove Qld 4059 Australia Rhein Westfal TH Aachen Inst Text Technol D-52074 Aachen Germany Imperial Coll London Inst Clin Sci Fac Med BHF Ctr Res Excellence South Kensington Campus London SW7 2AZ England Delft Univ Technol TUD Fac Mech Engn 3me Dept Biomech Engn Delft Netherlands Univ Sydney Sch Chem & Biomol Engn Darlington NSW 2006 Australia

Vascular compliance is considered both a cause and a consequence of cardiovascular disease and a significant factor in the mid- and long-term patency of vascular grafts. However, the biomechanical effects of localised changes in compliance cannot be satisfactorily studied with the available medical imaging technologies or surgical simulation materials. To address this unmet need, we developed a coupled silico-vitro platform which allows for the validation of numerical fluid-structure interaction results as a numerical model and physical prototype. This numerical one-way and two-way fluid-structure interaction study is based on a three-dimensional computer model of an idealised femoral artery which is validated against patient measurements derived from the literature. The numerical results are then compared with experimental values collected from compliant arterial phantoms via direct pressurisation and ring tensile testing. Phantoms within a compliance range of 1.4-68.0%/ 100 mmHg were fabricated via additive manufacturing and silicone casting, then mechanically characterised via ring tensile testing and optical analysis under direct pressurisation with moderately statistically significant differences in measured compliance ranging between 10 and 20% for the two methods. One-way fluid-structure interaction coupling underestimated arterial wall compliance by up to 14.7% compared with two-way coupled models. Overall, SolarisTM (Smooth-On) matched the compliance range of the numerical and in vivo patient models most closely out of the tested silicone materials. Our approach is promising for vascular applications where mechanical compliance is especially important, such as the study of diseases which commonly affect arterial wall stiffness, such as atherosclerosis, and the model-based design, surgical training, and optimisation of vascular prostheses.

关键词： Peripheral artery disease Blood flow Computational fluid dynamics fluid-structure interaction Cardiovascular biomechanics

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fluid-structure interaction of an aortic heart valve prosthesis driven by an animated anatomic left ventricle

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JOURNAL OF COMPUTATIONAL PHYSICS 2013年 244卷 41-62页

作者： Trung Bao Le Sotiropoulos, Fotis Univ Minnesota Dept Civil Engn St Anthony Falls Lab Minneapolis MN 55414 USA

We develop a novel large-scale kinematic model for animating the left ventricle (LV) wall and use this model to drive the fluid-structure interaction (FSI) between the ensuing blood flow and a mechanical heart valve prosthesis implanted in the aortic position of an anatomic LV/aorta configuration. The kinematic model is of lumped type and employs a cell-based, FitzHugh-Nagumo framework to simulate the motion of the LV wall in response to an excitation wavefront propagating along the heart wall. The emerging large-scale LV wall motion exhibits complex contractile mechanisms that include contraction (twist) and expansion (untwist). The kinematic model is shown to yield global LV motion parameters that are well within the physiologic range throughout the cardiac cycle. The FSI between the leaflets of the mechanical heart valve and the blood flow driven by the dynamic LV wall motion and mitral inflow is simulated using the curvilinear immersed boundary (CURVIB) method (Ge and Sotiropoulos, 2007;Borazjani et al., 2008) [1,2] implemented in conjunction with a domain decomposition approach. The computed results show that the simulated flow patterns are in good qualitative agreement with in vivo observations. The simulations also reveal complex kinematics of the valve leaflets, thus, underscoring the need for patient-specific simulations of heart valve prosthesis and other cardiac devices. (c) 2012 Elsevier Inc. All rights reserved.

关键词： Cardiac electrophysiology FitzHugh-Nagumo model Left heart hemodynamics Patient-specific modeling Bi-leaflet mechanical heart valve fluid-structure interaction

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Biomedical fluid mechanics and fluid-structure interaction

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COMPUTATIONAL MECHANICS 2014年第4期54卷 893-893页

作者： Bazilevs, Yuri Takizawa, Kenji Tezduyar, Tayfun E. Univ Calif San Diego San Diego CA 92103 USA Waseda Univ Tokyo Japan Rice Univ Houston TX 77005 USA

In 2013, we celebrated the 70th Birthday of Thomas J.R. Hughes, a leader in computational mechanics. With this special issue, we recognize Tom Hughes’s contributions and impact in biomedical fluid mechanics and fluid... 详细信息

关键词： HEART assist devices fluid mechanics fluid-structure interaction BIOMECHANICS COMPUTATIONAL mechanics ISOGEOMETRIC analysis

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A model reduction approach for the variational estimation of vascular compliance by solving an inverse fluid-structure interaction problem

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INVERSE PROBLEMS 2014年第5期30卷 055006-55005页

作者： Bertagna, Luca Veneziani, Alessandro Emory Univ Dept Math & Comp Sci Atlanta GA 30322 USA

Scientific computing has progressively become an important tool for research in cardiovascular diseases. The role of quantitative analyses based on numerical simulations has moved from 'proofs of concept' to patient-specific investigations, thanks to a strong integration between imaging and computational tools. However, beyond individual geometries, numerical models require the knowledge of parameters that are barely retrieved from measurements, especially in vivo. For this reason, recently cardiovascular mathematics considered data assimilation procedures for extracting the knowledge of patient-specific parameters from measures and images. In this paper, we consider specifically the quantification of vascular compliance, i.e. the parameter quantifying the tendency of arterial walls to deform under blood stress. Following up a previous paper, where a variational data assimilation procedure was proposed, based on solving an inverse fluid-structure interaction problem, here we consider model reduction techniques based on a proper orthogonal decomposition approach to accomplish the solution of the inverse problem in a computationally efficient way.

关键词： fluid-structure interaction blood flow model reduction parameter estimation

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A Nonisothermal fluid-structure interaction Analysis on the Piston/Cylinder Interface Leakage of High-Pressure Fuel Pump

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JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME 2014年第2期136卷 021704-021704页

作者： Qian, Dexing Liao, Ridong Beijing Inst Technol Sch Mech Engn Beijing 100081 Peoples R China

In this paper, a nonisothermal fluid-structure interaction mathematical model for the piston/cylinder interface leakage is presented. Full account is taken of the piston eccentricity, elastic deformations of the piston pair, the nonisothermal flow in the interface, and the physical properties of the fluid such as the pressure-viscosity and temperature-viscosity effects. The numerical method for the solution of the model is given, which can simultaneously solve for the fluid pressure distribution and leakage rate in the interface. The model is validated by comparing the calculated leakage rates with the measurements. Results show the good accuracy of the model. The impacts of parameters such as the piston diameter, the initial clearance between the piston pair, and the piston velocity on the leakage rate are discussed. Some of the conclusions provide good guidance for the design of high-pressure fuel pumps.

关键词： diesel engine high-pressure fuel pump piston/cylinder interface leakage seal viscosity fluid-structure interaction elastohydrodynamic lubrication nonisothermal

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MPS-FEM PARTITIONED COUPLING APPROACH FOR fluid-structure interaction WITH FREE SURFACE FLOW

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INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS 2014年第4期11卷 1350101页

作者： Mitsume, N. Yoshimura, S. Murotani, K. Yamada, T. Univ Tokyo Sch Engn Dept Syst Innovat Bunkyo Ku Tokyo 1138656 Japan

fluid-structure interaction analysis involving free surface flow has been investigated using mesh-based methods or mesh-free particle methods. While mesh-based methods have several problems in dealing with the fragmentation of geometry and moving interfaces and with the instability of nonlinear advective terms, mesh-free particle methods can deal with free surface and moving boundary relatively easily. In structural analyses, the finite element method, which is a mesh-based method, has been investigated extensively and can accurately deal with not only elastic problems but also plastic and fracture problems. Thus, the present study proposes a partitioned coupling strategy for fluid-structure interaction problems involving free surfaces and moving boundaries that calculates the fluid domain using the moving particle simulation method and the structure domain using the finite element method. As the first step, we apply a conventional serial staggered algorithm as a weak coupling scheme. In addition, for the verification of the proposed method, the problem of a breaking dam on an elastic wall is calculated, and the results are compared with the results obtained by other methods.

关键词： fluid-structure interaction finite element method moving particle simulation free surface flow MPS-FEM coupling technique

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