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A hybrid level set-front tracking finite element approach for fluid-structure interaction and two-phase flow applications

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JOURNAL OF COMPUTATIONAL PHYSICS 2013年 255卷 228-244页

作者： Basting, Steffen Weismann, Martin Univ Erlangen Nurnberg Dept Math D-91058 Erlangen Germany

We present a hybrid level set-front tracking approach suitable for fluid-structure interaction and two-phase flow applications. Our approach aims at extending geometrical flexibility of standard mesh moving/front tracking methods by introducing an additional implicit level set representation of the geometry under consideration. The computational mesh is automatically aligned to the implicitly described geometry by minimizing a nonlinear, constrained functional. Resulting triangulations approximate the geometry accurately while being optimal in a certain sense. Due to the mesh alignment, finite element spaces defined on these triangulations may be easily adjusted to account for special solution properties such as discontinuities across interfaces. In order to demonstrate the flexibility of the proposed approach, we apply it to a simplified one-way coupled fluid-structure interaction problem inspired by the flow induced by a moving cardiac valve. Furthermore we evaluate the approach by solving a two-phase flow benchmark problem. (c) 2013 Elsevier Inc. All rights reserved.

关键词： Level set method Front tracking Mesh optimization Arbitrary Lagrangian-Eulerian formulation fluid-structure interaction Two-phase flow

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Nonlinear metamaterial enabled aeroelastic vibration reduction of a supersonic cantilever wing plate

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Applied Mathematics and Mechanics(English Edition) 2024年第10期45卷 1749-1772页

作者： Peng SHENG Xin FANG Dianlong YU Jihong WEN Laboratory of Science and Technology on Integrated Logistics Support College of Intelligence Science and TechnologyNational University of Defense TechnologyChangsha 410073China

The violent vibration of supersonic wings threatens aircraft *** paper proposes the strongly nonlinear acoustic metamaterial(NAM)method to mitigate aeroelastic vibration in supersonic wing *** employ the cantilever plate to simulate the practical behavior of a *** aeroelastic vibration model of the NAM cantilever plate is established based on the mode superposition method and a modified third-order piston *** aerodynamic properties are systematically studied using both the timedomain integration and frequency-domain harmonic balance *** presenting the flutter and post-flutter behaviors of the NAM wing,we emphasize more on the preflutter broadband vibration that is prevalent in *** results show that the NAM method can reduce the low-frequency and broadband pre-flutter steady vibration by 50%-90%,while the post-flutter vibration is reduced by over 95%,and the critical flutter velocity is also slightly *** clarified,the significant reduction arises from the bandgap,chaotic band,and nonlinear resonances of the NAM *** reduction effect is robust across a broad range of parameters,with optimal performance achieved with only 10%attached *** work offers a novel approach for reducing aeroelastic vibration in aircraft,and it expands the study of nonlinear acoustic/elastic metamaterials.

关键词： nonlinear acoustic metamaterial(NAM) hypersonic aeroelastic vibration vibration reduction fluid-structure interaction

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An Innovative Coupled Common-Node Discrete Element Method-Smoothed Particle Hydrodynamics Model Developed with LS-DYNA and Its Applications

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China Ocean Engineering 2024年第3期38卷 467-482页

作者： SHEN Zhong-xiang WANG Wen-qing XU Cheng-yue LUO Jia-xin LIU Ren-wei School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China College of Harbor Coastal and Offshore EngineeringHohai UniversityNanjing 210098China

In this study,a common-node DEM-SPH coupling model based on the shared node method is proposed,and a fluid–structure coupling method using the common-node discrete element method-smoothed particle hydrodynamics(DS-SPH)method is developed using LS-DYNA *** DEM and SPH are established on the same node to create common-node DEM-SPH particles,allowing for fluid–structure *** simulations of various scenarios,including water entry of a rigid sphere,dam-break propagation over wet beds,impact on an ice plate floating on water and ice accumulation on offshore structures,are *** interaction between DS particles and SPH fluid and the crack generation mechanism and expansion characteristics of the ice plate under the interaction of structure and fluid are also *** results are compared with available data to verify the proposed coupling ***,the simulation results demonstrated that controlling the cutoff pressure of internal SPH particles could effectively control particle splashing during ice crushing failure.

关键词： common-node DEM-SPH fluid-structure interaction discrete element method smoothed particle hydrodynamics

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CHALLENGES AND DIRECTIONS IN COMPUTATIONAL fluid-structure interaction

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MATHEMATICAL MODELS & METHODS IN APPLIED SCIENCES 2013年第2期23卷 215-221页

作者： Bazilevs, Yuri Takizawa, Kenji Tezduyar, Tayfun E. Univ Calif San Diego Dept Struct Engn La Jolla CA 92037 USA Waseda Univ Dept Modern Mech Engn Shinjuku Ku Tokyo 1698050 Japan Waseda Univ Waseda Inst Adv Study Shinjuku Ku Tokyo 1698050 Japan Rice Univ Houston TX 77005 USA

In this lead paper of the special issue, we provide some comments on challenges and directions in computational fluid-structure interaction (FSI). We briefly discuss the significance of computational FSI methods, their components, moving-mesh and nonmoving-mesh methods, mesh moving and remeshing concepts, and FSI coupling techniques.

关键词： fluid-structure interaction FSI interface-tracking method moving-mesh method interface-capturing method nonmoving-mesh method ALE method space-time method mesh moving remeshing FSI coupling techniques

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Coupled finite element and cellular automata methods for analysis of composite structures with fluid-structure interaction

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COMPOSITE structureS 2013年 102卷 124-137页

作者： Craugh, L. E. Kwon, Y. W. USN Acad Dept Mech Eng Annapolis MD 21402 USA USN Dept Mech & Aero Eng Postgrad Sch Monterey CA 93943 USA

This study examines multiple computational techniques to analyze dynamic responses of composite structures subject to fluid-structure interaction (FSI). A plate bending finite element with displacement degrees of freedom only is developed and implemented using a Discontinuous Galerkin (DG) formulation. Because the plate elements can be stacked on top of one another like 3-D solid elements, delamination or debonding between any two layers can be modeled easily. Multiple approaches to analyzing such failure are presented and evaluated. A hybrid Finite Element-Cellular Automata (FE-CA) approach is also presented to model a fluid domain as an acoustic field using the wave equation. The coupled technique can take advantage of both methods such as computational efficiency, non-reflecting boundary representation and easy coupling with a structure with a complex shape. The FE-CA fluid model is then combined with the DG structural model to simulate fluid-structure interaction. All the computational techniques are assessed for their accuracy by comparing with analytical, experimental and other numerical solutions. Each technique addressed shows promise for flexible and accurate modeling of dynamic behaviors of damaged or undamaged laminated composite structures subject to fluid-structure interaction with moderate computational costs. Published by Elsevier Ltd.

关键词： Discontinuous Galerkin method Cellular automata Composite plates fluid-structure interaction Wave equation

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Analysis on the lubrication performances of journal bearing system using computational fluid dynamics and fluid-structure interaction considering thermal influence and cavitation

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TRIBOLOGY INTERNATIONAL 2013年 64卷 8-15页

作者： Lin, Qiyin Wei, Zhengying Wang, Ning Chen, Wei Xi An Jiao Tong Univ State Key Lab Mfg Syst Engn Xian 710049 Shaanxi Peoples R China

Since it's difficult to study the fluid/structure interactions in a rotor-bearing system using the conventional method, a new transient analysis method combining computational fluid dynamics and fluid-structure interaction was applied based on actual physical model. Both thermal influence and cavitation were studied. A comparison with the published experimental results was presented and discussed, and theoretical predictions agreed well with the experimental results. Four rotor-bearing systems with different grooves were studied. This developed method can be a very useful tool for the study on the bearing lubrication problem, and can effectively and accurately predict the transient lubrication process. (C) 2013 Elsevier Ltd. All rights reserved.

关键词： fluid-structure interaction Cavitation Thermal analysis Actual physical model

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Numerical simulation on fluid-structure interaction of wind around super-tall building at high reynolds number conditions

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STRUCTURAL ENGINEERING AND MECHANICS 2013年第2期46卷 197-212页

作者： Huang, Shenghong Li, Rong Li, Q. S. Univ Sci & Technol China Sch Engn Sci Hefei 230026 Peoples R China City Univ Hong Kong Dept Bldg & Construct Kowloon Hong Kong Peoples R China

With more and more high-rise building being constructed in recent decades, bluff body flow with high Reynolds number and large scale dimensions has become an important topic in theoretical researches and engineering applications. In view of mechanics, the key problems in such flow are high Reynolds number turbulence and fluid-solid interaction. Aiming at such problems, a parallel fluid-structure interaction method based on socket parallel architecture was established and combined with the methods and models of large eddy simulation developed by authors recently. The new method is validated by the full two-way FSI simulations of 1:375 CAARC building model with Re = 70000 and a full scale Taipei101 high-rise building with Re = 1e8, The results obtained show that the proposed method and models is potential to perform high-Reynolds number LES and high-efficiency two-way coupling between detailed fluid dynamics computing and solid structure dynamics computing so that the detailed wind induced responses for high-rise buildings can be resolved practically.

关键词： fluid-structure interaction computational fluid dynamics computational structural dynamics large Eddy simulation tall building wind effect

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3D fluid-structure interaction analysis of a typical liquid rocket engine cycle based on a novel viscoplastic damage model

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INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING 2013年第13期94卷 1165-1190页

作者： Kowollik, D. Tini, V. Reese, S. Haupt, M. Braunschweig Univ Technol Inst Aircraft Design & Lightweight Struct D-38108 Braunschweig Germany Rhein Westfal TH Aachen Inst Appl Mech D-52074 Aachen Germany

In many space missions, expandable or reusable launch systems are used. In this context, the reliable design of liquid rocket engines (LREs) is a key issue. In the present paper, we present a novel combination of numerical schemes. It is applied to model the extreme physical phenomena a typical LRE undergoes during its loading cycles. The numerical scheme includes a partitioned fluid-structure interaction (FSI) algorithm in combination with a unified viscoplastic damage model. This allows the complex description of the material response under cyclic thermomechanical loading taking place in LREs. In this regard, we focus on the response of the cooling channel wall that is made from copper alloys. For the coupled FSI analysis, the individual domains of the rocket thrust chamber are modeled by a 3D parametrized approach. The well-established single field solver codes, DLR TAU for the hot gas and ABAQUS FE software for the structural domain, are coupled via the inhouse developed simulation environment ifls. Ifls provides the necessary algorithms for a partitioned coupling approach such as individual code steering, data interpolation, time integration and iteration control. Finally, the results of an FSI analysis of a complete engine cycle are presented. They show the potential of the new numerical scheme for the lifetime prediction of *** (c) 2013 John Wiley & Sons, Ltd.

关键词： fluid-structure interaction FEMs damage viscoplasticity Navier-Stokes

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A unified mathematical framework and an adaptive numerical method for fluid-structure interaction with rigid, deforming, and elastic bodies

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JOURNAL OF COMPUTATIONAL PHYSICS 2013年 250卷 446-476页

作者： Bhalla, Amneet Pal Singh Bale, Rahul Griffith, Boyce E. Patankar, Neelesh A. Northwestern Univ Dept Mech Engn Evanston IL 60208 USA NYU Sch Med Dept Med Leon H Charney Div Cardiol New York NY 10016 USA

Many problems of interest in biological fluid mechanics involve interactions between fluids and solids that require the coupled solution of momentum equations for both the fluid and the solid. In this work, we develop a mathematical framework and an adaptive numerical method for such fluid-structure interaction (FSI) problems in which the structure may be rigid, deforming, or elastic. We employ an immersed boundary (IB) formulation of the problem that permits us to avoid body conforming discretizations and to use fast Cartesian grid solvers. Rigidity and deformational kinematic constraints are imposed using a formulation based on distributed Lagrange multipliers, and a conventional IB method is used to describe the elasticity of the immersed body. We use Cartesian grid adaptive mesh refinement (AMR) to discretize the equations of motion and thereby obtain a solution methodology that efficiently captures thin boundary layers at fluid-solid interfaces as well as flow structures shed from such interfaces. This adaptive methodology is validated for several benchmark problems in two and three spatial dimensions. In addition, we use this scheme to simulate free swimming, including the maneuvering of a two-dimensional model eel and a three-dimensional model of the weakly electric black ghost knifefish. (C) 2013 Elsevier Inc. All rights reserved.

关键词： fluid-structure interaction Incompressible Navier-Stokes equations Immersed boundary method Distributed Lagrange multipliers Adaptive mesh refinement Free swimming

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Partitioned Simulation of fluid-structure interaction Coupling Black-Box Solvers with Quasi-Newton Techniques

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ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING 2013年第3期20卷 185-238页

作者： Degroote, Joris Sint Pietersnieuwstr 41 B-9000 Ghent Belgium

In this review article, the focus is on partitioned simulation techniques for strongly coupled fluid-structure interaction problems, especially on techniques which use at least one of the solvers as a black box. First, a number of analyses are reviewed to explain why Gauss-Seidel coupling iterations converge slowly or not at all for fluid-structure interaction problems with strong coupling. This provides the theoretical basis for the fast convergence of quasi-Newton and multi-level techniques. Second, several partitioned techniques that couple two black-box solvers are compared with respect to implementation and performance. Furthermore, performance comparisons between partitioned and monolithic techniques are examined. Subsequently, two similar techniques to couple a black-box solver with an accessible solver are analyzed. In addition, several other techniques for fluid-structure interaction simulations are studied and various methods to take into account deforming fluid domains are discussed.

关键词： fluid-structure interaction Partitioned simulation Quasi-Newton Coupling algorithm

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