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Quasi-Newton waveform iteration for partitioned surface-coupled multiphysics applications

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING 2021年第19期122卷 5236-5257页

作者： Rueth, Benjamin Uekermann, Benjamin Mehl, Miriam Birken, Philipp Monge, Azahar Bungartz, Hans-Joachim Tech Univ Munich Dept Informat Boltzmannstr 3 D-85748 Garching Germany Einhoven Univ Technol Dept Mech Engn Eindhoven Netherlands Univ Stuttgart Inst Parallel & Distributed Syst Stuttgart Germany Lund Univ Ctr Math Sci Lund Sweden

We present novel coupling schemes for partitioned multiphysics simulation that combine four important aspects for strongly coupled problems: implicit coupling per time step, fast and robust acceleration of the corresponding iterative coupling, support for multirate time stepping, and higher-order convergence in time. To achieve this, we combine waveform relaxation-a known method to achieve higher-order in applications with split time stepping based on continuous representations of coupling variables in time- with interface quasi-Newton coupling, which has been developed throughout the last decade and is generally accepted as a very robust iterative coupling method even for gluing together black-box simulation codes. We show convergence results (in terms of convergence of the iterative solver and in terms of approximation order in time) for two academic testcases-a heat transfer scenario and a fluid-structure interaction simulation. We show that we achieve the expected approximation order and that our iterative method is competitive in terms of iteration counts with those designed for simpler first-order-in-time coupling.

关键词： conjugate heat transfer fluid-structure interaction higher-order multirate multiscale multiphysics quasi-Newton waveform iteration

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Analysis of wind-induced vibration of fluid-structure interaction system for isolated aqueduct bridge

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ENGINEERING structureS 2013年 46卷 28-37页

作者： Zhang, Hua Liu, Liang Dong, Ming Sun, Hao Hohai Univ Coll Civil & Transportat Engn Nanjing 210098 Jiangsu Peoples R China Columbia Univ Dept Civil Engn & Engn Mech New York NY 10027 USA

This paper studies the dynamic properties of aqueduct-water coupling system in bent-type aqueduct structures using the Arbitrary Lagrangian-Eulerian (ALE) method. A three-dimensional fluid-structure interaction model was established, with plate rubber supports. The speed-time sequence of fluctuating wind acting on the aqueduct was simulated by the Auto-regressive Moving Average (ARMA) model. The natural vibration characteristics, seismic responses, and wind responses of the aqueduct structure were calculated and comparatively analyzed in different conditions of water depth. The simulation results show that the application of isolation technology can reduce aqueduct stiffness and change the vibration characteristics of an aqueduct structure. The application of isolated technique is able to elevate the earthquake resistance performance of aqueduct structure. However, the isolation remarkably increases the wind stress response and reduces wind resistance performance of the aqueduct bridge. (C) 2012 Elsevier Ltd. All rights reserved.

关键词： Isolated aqueduct bridge ARMA model fluid-structure interaction Wind response Seismic response

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Simulating fluid-structure interactions with a hybrid immersed smoothed point interpolation method

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ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS 2021年 130卷 352-363页

作者： Wang, Shuangqiang Zhang, Guiyong Yan, Boqian Chen, Yuzhen Zhang, Zhifan Dalian Univ Technol Sch Naval Architecture State Key Lab Struct Anal Ind Equipment Dalian 116024 Peoples R China Collaborat Innovat Ctr Adv Ship & Deep Sea Explor Shanghai 200240 Peoples R China CSSC Shanghai Merchant Ship Design & Res Inst Shanghai 201203 Peoples R China

In this paper, a hybrid immersed smoothed point interpolation method (hybrid IS-PIM) is proposed, which em-ploys a hybrid force approach to impose fluid-structure interaction (FSI) force condition. Compared with the original IS-PIM using a complete body force, the hybrid IS-PIM still utilizes the form of body force for pressure term to enhance the stability of numerical algorithm, and the shear force is applied to the boundary to accord with the physical law and the practical situation. Numerical examples have shown that the body force term en-ables the proposed method to overcome the constraint of mesh size ratio, and the boundary force term has a direct effect on the motion and deformation of solids, which yields more accurate results in comparison with the complete body force applied in the original IS-PIM. Moreover, the equivalence of FSI force in forms of body force and boundary force are also verified straightforwardly using a series of mesh combinations.

关键词： Hybrid force fluid-structure interaction Immersed smoothed point interpolation method

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Effect of leading-edge and trailing-edge camber morphing on gust load for an elastic wing

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Chinese Journal of Aeronautics 2025年第4期38卷 204-220页

作者： Yuting DAI Yating HU You WU Chen SONG Chao YANG School of Aeronautic Science and Engineering Beihang UniversityBeijing 100191China Tianmushan Laboratory Hangzhou 311115China CAEP Software Center for High-Performance Numerical Simulation Beijing 100088China Institute of Applied Physics and Computational Mathematics Beijing 100088China

This paper investigates the influence of the spanwise-distributed trailing-edge camber morphing on the dynamic stall characteristics of a finite-span wing at Re=2×10^(5).The mathematical model of the spanwise-distributed trailing-edge camber morphing is established based on Chebyshev polynomials,and the deformed wing surface is modeled by a spline surface according to the rib's morphing in the chordwise *** Computational fluid Dynamics(CFD)method is adopted to obtain flow-field results and aerodynamic *** SST-γmodel is introduced and the overset mesh technique is *** numerical results show that the spanwisedistributed trailing-edge morphing obviously changes the aerodynamic and energy transfer characteristics of the dynamic *** when the phase difference between the trailing-edge motion and the wing pitch is-π/2,the interaction between the three-dimensional(3-D)Leading-Edge Vortex(LEV)and Trailing-Edge Vortex(TEV)is strengthened,and the work done by the aerodynamic force turns *** indicates that the trailing-edge deformation has the potential to suppress the oscillation amplitude of stall *** also found that as the trailing-edge camber morphing varies more complexly along the spanwise direction,the suppression effect decreases accordingly.

关键词： fluid-structure interaction Wing morphing Gust load alleviation Unsteady flow Phase offset

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Time accurate partitioned algorithms for the solution of fluid-structure interaction problems in haemodynamics

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COMPUTERS & fluidS 2013年 86卷 470-482页

作者： Nobile, Fabio Pozzoli, Matteo Vergara, Christian Ecole Polytech Fed Lausanne CSQI MATHICSE CH-1015 Lausanne Switzerland Politecn Milan Dipartimento Matemat Brioschi MOX I-20133 Milan Italy Univ Bergamo Dipartimento Ingn I-24044 Dalmine BG Italy

In this work we deal with the numerical solution of the fluid-structure interaction problem arising in the haemodynamic environment. In particular, we consider BDF and Newmark time discretization schemes, and we study different methods for the treatment of the fluid-structure interface position, focusing on partitioned algorithms for the prescription of the physical continuity conditions at the fluid-structure interface. We consider semi-implicit and implicit algorithms, and a new family of hybrid methods. We study numerically the performance and the accuracy of these schemes, highlighting the best solutions for haemodynamic applications. We also study numerically their convergence properties with respect to time discretization, by introducing an analytical test case. (C) 2013 Elsevier Ltd. All rights reserved.

关键词： fluid-structure interaction Blood flow BDF schemes Time accuracy Partitioned schemes

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High-order fluid-structure interaction in 2D and 3D application to blood flow in arteries

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JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS 2013年第1期246卷 1-9页

作者： Chabannes, Vincent Pena, Goncalo Prud'homme, Christophe Univ Grenoble 1 CNRS Lab Jean Kuntzman UMR 5224 F-38041 Grenoble France Univ Coimbra CMUC P-3001454 Coimbra Portugal Univ Strasbourg CNRS IRMA UMR 7501 F-67000 Strasbourg France

This paper addresses the numerical approximation of fluid-structure interaction (FSI) problems through the arbitrary Lagrangian Eulerian (ALE) framework, high-order methods and a Dirichlet -Newmann approach for the coupling. The paper is divided into two main parts. The first part concerns the discretization method for the FSI problem. We introduce an improved ALE map, capable of handling curved geometries in 2D and 3D in a unified manner, that is based on a local differential operator. We also propose a minimal continuous interior penalty (CIP) stabilization term for the fluid discretization that accounts for a smaller computational effort, while stabilizing the flow regime. The second part is dedicated to validating our numerical strategy through a benchmark and some applications to blood flow in arteries. (C) 2012 Elsevier B.V. All rights reserved.

关键词： High-order methods Arbitrary Lagrangian Eulerian transformation fluid-structure interaction

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Study on the fluid-structure interaction of flexible printed circuit board motherboard in personal computer casings

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MICROELECTRONICS INTERNATIONAL 2013年第3期30卷 138-150页

作者： Leong, Wei Chiat Abdullah, Mohd Zulkifly Khor, Chu Yee Ramdan, Dadan Univ Sains Malaysia Sch Mech Engn Nibong Tebal Penang Malaysia

Purpose - The flexible printed circuit board (FPCB) can be an alternative to the rigid printed circuit board because of its excellent flexibility, twistability, and light weight. Using FPCB to construct personal computer (PC) motherboard is still rare. Therefore, the present study aims to investigate the fluid-structure interaction (FSI) behaviors of the newly proposed FPCB motherboard under fan-flow condition in the PC casings. Design/methodology/approach - The deflection and stress induced, which are usually ignored in the traditional rigid motherboard, are the main concern in the current FPCB motherboard studies. Only a few studies have been conducted on the effect of inlet locations, effect of inlet sizes, effect of multi-inlets, and effect of a two-fan system. These numerical analyses are performed using the fluid flow solver FLUENT and the structural solver ABAQUS;they are real-time online coupled by Mesh-based Parallel Code Coupling Interface (MpCCI). Findings - A smaller inlet size can cause higher deflection and stress fluctuations, but the fluctuations can be reduced by incorporating the multi-inlets design. In addition, the inlet locations and two-fan system can prominently affect the magnitudes of the deflection and stress induced. Practical implications - The current study provides better understanding and allows designers to be aware of the FSI phenomenon when dealing with the FPCB motherboard. Although the present study primarily focuses on the motherboard, the findings could also contribute valuable information for other FPCB applications. Originality/value - The present study extends the FSI investigation from the previous novel approach of FPCB motherboard, and uniquely explores the behaviors of the FPCB motherboard inside different PC casings.

关键词： fluid-structure interaction FPCB motherboard PC casings Deflection Stress Computers Circuits

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Parallel adaptive fluid-structure interaction simulation of explosions impacting on building structures

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COMPUTERS & fluidS 2013年 88卷 719-729页

作者： Deiterding, R. Wood, S. Oak Ridge Natl Lab Oak Ridge TN 37831 USA Univ Tennessee Bredesen Ctr Knoxville TN 37996 USA

We pursue a level set approach to couple an Eulerian shock-capturing fluid solver with space-time refinement to an explicit solid dynamics solver for large deformations and fracture. The coupling algorithms considering recursively finer fluid time steps as well as overlapping solver updates are discussed. Our ideas are implemented in the AMROC adaptive fluid solver framework and are used for effective fluid-structure coupling to the general purpose solid dynamics code DYNA3D. Beside simulations verifying the coupled fluid-structure solver and assessing its parallel scalability, the detailed structural analysis of a reinforced concrete column under blast loading and the simulation of a prototypical blast explosion in a realistic multistory building are presented. (C) 2013 Elsevier Ltd. All rights reserved.

关键词： fluid-structure interaction Adaptive mesh refinement Cartesian embedded boundary method Building structures Parallelization

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The effect of aortic wall and aortic leaflet stiffening on coronary hemodynamic: a fluid-structure interaction study

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MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING 2013年第8期51卷 923-936页

作者： Nobari, S. Mongrain, R. Leask, R. Cartier, R. McGill Univ Dept Biomed Engn Montreal PQ Canada Montreal Heart Inst Dept Cardiovasc Surg Montreal PQ H1T 1C8 Canada McGill Univ Dept Mech Engn Montreal PQ Canada McGill Univ Dept Chem Engn Montreal PQ Canada

Pathologies of the aortic valve such as aortic sclerosis are thought to impact coronary blood flow. Recent clinical investigations have observed simultaneous structural and hemodynamic variations in the aortic valve and coronary arteries due to regional pathologies of the aortic valve. The goal of the present study is to elucidate this observed and yet unexplained phenomenon, in which a local pathology in the aortic valve region could potentially lead to the initiation or progression of coronary artery disease. Results revealed a considerable impact on the coronary flow, velocity profile, and consequently shear stress due to an increase in the aortic wall or aortic leaflet stiffness and thickness which concur with clinical observations. The cutoff value of 0.75 for fractional flow reserve was reached when the values of leaflet thickness and aortic wall stiffness were approximately twice and three times their normal value, respectively. Variations observed in coronary velocity profiles as well as wall shear stress suggest a possible link for the initiation of coronary artery disease.

关键词： Aortic valve Coronary arteries Hemodynamic Pathologies Three-dimensional global model fluid-structure interaction

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A coupled lattice Boltzmann-finite element approach for two-dimensional fluid-structure interaction

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COMPUTERS & fluidS 2013年 86卷 558-568页

作者： De Rosis, Alessandro Falcucci, Giacomo Ubertini, Stefano Ubertini, Francesco Univ Bologna Dept Civil Environm & Mat Engn DICAM I-40136 Bologna Italy Univ Naples Parthenope Dept Technol I-80143 Naples Italy Largo Univ snc Univ Tuscia Ind Engn Sch DEIM I-01100 Viterbo Italy

In this paper, a systematic approach to couple the lattice Boltzmann and the finite element methods is presented for fluid-structure interaction problems. In particular, elastic structures and weakly compressible viscous fluids are considered. Three partitioned coupling strategies are proposed and the accuracy and convergence properties of the resultant algorithms are numerically investigated together with their computational efficiency. The corotational formulation is adopted to account for structure large displacements. The Time Discontinuous Galerkin method is used as time integration scheme for structure dynamics. The advantages over standard Newmark time integration schemes are discussed. In the lattice Boltzmann solver, an accurate curved boundary condition is implemented in order to properly define the structure position. In addition, moving boundaries are treated by an effective refill procedure. (C) 2013 Elsevier Ltd. All rights reserved.

关键词： fluid-structure interaction Lattice Boltzmann method Time Discontinuous Galerkin

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