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A second-order time accurate semi-implicit method for fluid-structure interaction problems

JOURNAL OF fluidS AND structureS 2019年 86卷 135-155页

作者： Naseri, Alireza Gonzalez, Ignacio Amani, Ahmad David Perez-Segarra, Carlos Oliva, Assensi Univ Politecn Cataluna Heat & Mass Transfer Technol Ctr CTTC ESEIAAT Colom 11 Terrassa 08222 Barcelona Spain

This paper is concerned with numerical solution of fluid-structure interaction (FSI) problems involving an incompressible viscous flow and an elastic structure. A semi-implicit partitioned method with second-order temporal accuracy is proposed. The method separates the pressure term of the fluid equations and strongly couples it to the structure, while the remaining fluid terms and the geometrical nonlinearities are treated explicitly. A secondorder projection method is used to solve the fluid equations and also as a framework for the FSI coupling. Particular attention is paid to the boundary conditions for fluid equations and the accuracy of the fluid pressure on the common interface. The proposed coupling method retains the second-order accuracy for fully-coupled nonlinear FSI problems. Extensive numerical tests are carried out on a number of benchmark FSI problems and the secondorder temporal accuracy for all the variables of interest (fluid velocity and pressure, and structural displacement) is demonstrated. (C) 2019 Elsevier Ltd. All rights reserved.

关键词： fluid-structure interaction Partitioned method Semi-implicit coupling Projection method Second-order temporal accuracy

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Coupling of SPH with smoothed point interpolation method for violent fluid-structure interaction problems

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ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS 2019年 103卷 1-10页

作者： Zhang, Guiyong Wang, Shuangqiang Sui, Zhixiang Sun, Lei Zhang, Zhiqian Zong, Zhi Dalian Univ Technol Liaoning Engn Lab Deep Sea Floating Struct Sch Naval Architecture Engn Dalian 116024 Peoples R China Dalian Univ Technol 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 China Ship Dev & Design Ctr Shanghai 201108 Peoples R China ASTAR Inst High Performance Comp Singapore 117576 Singapore

A two dimensional fluid-structure interaction (FSI) model has been proposed by coupling SPH with smoothed point interpolation method (S-PIM). SPH is a Lagrangian particle method, which has been frequently used to simulate the incompressible viscous fluid with free surface flow. The newly developed S-PIM has been used to deal with motion and deformation of nonlinear solids. And the softened model stiffness in S-PIM enhances the performance of mesh distortion insensitivity for large deformation. The coupled SPH with S-PIM has been achieved by introducing the ghost particles, which can prevent the fluid particles penetrating into the interface and construct intact support domain for particles around the interface. Numerical examples have validated the reliability and efficiency of the proposed method for FSI problems.

关键词： SPH Smoothed point interpolation method fluid-structure interaction Free surface flow

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Rotor dynamic analysis of a tidal turbine considering fluid-structure interaction under shear flow and waves

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INTERNATIONAL JOURNAL OF NAVAL ARCHITECTURE AND OCEAN ENGINEERING 2019年第1期11卷 154-164页

作者： Lass, Andre Schilling, Matti Kumar, Jitendra Wurm, Frank-Hendrik Univ Rostock Inst Turbomachinery Fac Mech Engn & Marine Technol Albert Einstein Str 2 D-18059 Rostock Germany

A rotor dynamic analysis is mandatory for stability and design optimization of submerged propellers and turbines. An accurate simulation requires a proper consideration of fluid-induced reaction forces. This paper presents a bi-directional coupling of a bond graph method solver and an unsteady vortex lattice method solver where the former is used to model the rotor dynamics of the power train and the latter is used to predict transient hydrodynamic forces. Due to solver coupling, determination of hydrodynamic coefficients is obsolete and added mass effects are considered automatically. Additionally, power grid and structural faults like grid fluctuations, eccentricity or failure could be investigated using the same model. In this research work a fast, time resolved dynamic simulation of the complete power train is conducted. As an example, the rotor dynamics of a tidal stream turbine is investigated under two inflow conditions: I - shear flow, II - shear flow + water waves. (C) 2018 Society of Naval Architects of Korea. Production and hosting by Elsevier B.V.

关键词： Transient rotor-dynamics UVLM Bond graph fluid-structure interaction Tidal turbine

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A smoothed particle element method (SPEM) for modeling fluid-structure interaction problems with large fluid deformations

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COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING 2019年 356卷 261-293页

作者： Zhang, Z. L. Long, T. Chang, J. Z. Liu, M. B. Peking Univ Coll Engn BIC ESAT Beijing 100871 Peoples R China Peking Univ Dept Mech & Engn Sci State Key Lab Turbulence & Complex Syst Beijing 100871 Peoples R China Peking Univ Inst Ocean Res Beijing 100871 Peoples R China Shanxi Inst Energy Taiyuan 030006 Shanxi Peoples R China

fluid-structure interaction (FSI) problems with large fluid deformations can be a great challenge for numerical simulations using conventional methods. In this paper, we propose a novel hybrid approach of an improved Smoothed Particle hydrodynamics and smoothed finite Element Method (SPEM) for modeling FSI problems. In SPEM, the edge-based smoothed finite element method (S-FEM) is developed in Lagrangian frame and is used for the first time to model both elastic structures and incompressible flows. For fluid regions with large deformations, the associated finite elements are adaptively converted into particles and the corresponding regions are subsequently modeled using the decoupled finite particle method (DFPM), which is an improved smoothed particle hydrodynamics (SPH) method suitable for modeling incompressible flows with free surfaces. A ghost particle-based interface algorithm to couple existing S-FEM elements and DFPM particles is developed in SPEM to implement the modeling of FSI problems. As the smoothed FEM and decoupled FPM are enhanced FEM and SPH respectively and DFPM is only used for local fluid regions with large deformations, it is expected that SPEM is more accurate and more efficient than the existing coupling approaches of conventional FEM and SPH. Five numerical examples are tested using the proposed SPEM and the comparative studies with results from other sources reveal that SPEM is an effective approach for modeling FSI problems with large fluid deformations. (C) 2019 Elsevier B.V. All rights reserved.

关键词： Smoothed particle element method (SPEM) Smoothed finite element method (S-FEM) Smoothed particle hydrodynamics (SPH) Decoupled finite particle method (DFPM) fluid-structure interaction

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Modeling of fluid-structure interaction to Enhance Battery Thermal Management in Electric Vehicles

Modeling of Fluid-Structure Interaction to Enhance Battery T...

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2021中国汽车工程学会年会暨展览会

作者： Liao Yinsheng Xu Haolun Huang Taishuo Shao Xingyang Hu Zhiming BYD AUTO INDUSTRY CO. LTD

Lithium battery can be considered as a high-power density energy storage device in hybrid electric *** battery's safety,driving range and functionality are sensitive to the working ***,electric vehicles need complicated battery thermal management components to satisfy the performance requirement of lithium ***,the lithium battery capacity for mild hybrid electric vehicles is much smaller than full electric vehicles,so the air-cooling system can be considered the best choice for mild hybrid electric *** different types of cooling performance,the other strength for an air cooling system is that it also can decrease the cost of developing a heat dissipation system in hybrid electric *** the same time,thermal diffusion around the battery cell can be considered as an obstacle for improving the convective heat transfer *** this study,a novel and self-agitated device that takes advantage of vortex-induced vibration is developed to disrupt the thermal boundary layer around the battery cell and enhance thermal *** arbitrary Lagrangian-Eulerian algorithm is developed to simulate fluid-structure interaction field to calculate the heat transfer *** air-cooling system of the battery pack is developed by using Simcenter *** AMESim model aims to verify the heat transfer coefficient calculated from the fluid-structure interaction cases,and then investigate the maximum temperature *** results demonstrate that the vortex-induced vibration by the self-agitated device can increase the heat transfer coefficient up to 46.66% compared with the traditional battery *** fluid-structure interaction algorithm can be used to enhance battery thermal management.

关键词： battery thermal management heat transfer enhancement vortex-induced vibration fluid-structure interaction thermal boundary layer

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A new approach for computing the steady state fluid-structure interaction response of periodic problems

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JOURNAL OF fluidS AND structureS 2019年 84卷 140-152页

作者： Maljaars, P. J. Kaminski, M. L. den Besten, J. H. Delft Univ Technol Maritime & Transport Technol Dept Delft Netherlands

A special type of fluid-structure interaction (FSI) problems are problems with periodic boundary conditions like in turbomachinery. The steady state FSI response of these problems is usually calculated with similar techniques as used for transient FSI analyses. This means that, when the fluid and structure problem are not simultaneously solved with a monolithic approach, the problem is partitioned into a fluid and structural part and that each time step coupling iterations are performed to account for strong interactions between the two sub-domains. This paper shows that a time-partitioned FSI computation can be very inefficient to compute the steady state FSI response of periodic problems. A new approach is introduced in which coupling iterations are performed on periodic level instead of per time step. The convergence behaviour can be significantly improved by implementing existing partitioned solution methods as used for time step coupling (TSC) algorithms in the time periodic coupling (TPC) framework. The new algorithm has been evaluated by comparing the convergence behaviour to TSC algorithms. It is shown that the number of fluid-structure evaluations can be considerably reduced when a TPC algorithm is applied instead of a TSC. One of the most appealing advantages of the TPC approach is that the structural problem can be solved in the frequency domain resulting in a very efficient algorithm for computing steady state FSI responses. (C) 2018 Elsevier Ltd. All rights reserved.

关键词： fluid-structure interaction Time periodic coupling Partitioned solution methods Strong coupling Quasi-Newton methods

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A coupled NMM-SPH method for fluid-structure interaction problems

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APPLIED MATHEMATICAL MODELLING 2019年 76卷 466-478页

作者： Xu, Ying Yu, Changyi Liu, Feng Liu, Qinya Tianjin Univ Sch Civil Engn State Key Lab Hydraul Engn Simulat & Safety Tianjin 300072 Peoples R China CCCC Tianjin Port Engn Inst Co Ltd Tianjin 300222 Peoples R China CCCC First Harbor Engn Co Co Ltd Tianjin 300461 Peoples R China Key Lab Geotech Engn Tianjin Tianjin 300222 Peoples R China Chinese Acad Sci Inst Rock & Soil Mech State Key Lab Geomech & Geotech Engn Wuhan 430071 Hubei Peoples R China Univ Toronto Dept Phys Toronto ON M5S 1A7 Canada

The main challenges in the numerical simulation of fluid-structure interaction (FSI) problems include the solid fracture, the free surface fluid flow, and the interactions between the solid and the fluid. Aiming to improve the treatment of these issues, a new coupled scheme is developed in this paper. For the solid structure, the Numerical Manifold Method (NMM) is adopted, in which the solid is allowed to change from continuum to discontinuum. The Smoothed Particle Hydrodynamics (SPH) method, which is suitable for free interface flow problem, is used to model the motion of fluids. A contact algorithm is then developed to handle the interaction between NMM elements and SPH particles. Three numerical examples are tested to validate the coupled NMM-SPH method, including the hydrostatic pressure test, dam-break simulation and crack propagation of a gravity dam under hydraulic pressure. Numerical modeling results indicate that the coupled NMM-SPH method can not only simulate the interaction of the solid structure and the fluid as in conventional methods, but also can predict the failure of the solid structure. (C) 2019 Elsevier Inc. All rights reserved.

关键词： fluid-structure interaction Numerical Manifold Method Smoothed Particle Hydrodynamics Coupled NMM-SPH method Contact algorithm

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Vibration investigation on fluid-structure interaction of AP1000 shield building subjected to multi earthquake excitations

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ANNALS OF NUCLEAR ENERGY 2019年第Apr.期126卷 312-329页

作者： Wang, Dayang Wu, Chengqing Huang, Wencheng Zhang, Yongshan Guangzhou Univ Sch Civil Engn Guangzhou 510006 Guangdong Peoples R China Univ Technol Sydney Sch Civil & Environm Engn Sydney NSW 2007 Australia

fluid-structure interaction (FSI) between water and water tank of AP1000 nuclear power plant has always been a hot topic because the gravity water tank plays a key role in protecting structural safety in an emergency such as an earthquake. The main target of this study is to investigate the FSI effect on structural dynamic responses of AP1000 shield building with filled and empty water tanks and to explore the most reasonable height of water level for reducing seismic response under inputs of multi three-direction earthquake excitations. For this purpose, method of nonlinear FSI algorithm of finite element is employed based on ANSYS platform. The numerical procedure is validated by comparison with theoretical calculation and existing experimental results of fluid free vibration and structural seismic responses in the situation of El Centro wave. Based on the validated numerical model, a series of numerical simulations on seven partially-filled models in six natural and one artificial earthquake are carried out and corresponding results, such as peak acceleration & displacement, floor response spectrum and structural base shear, are studied comparatively in details. Discussions of this study show that the partially-filled shield building appears significant FSI effect, which generates great influence on structural dynamic characteristics and responses. Reasonable design of the water level can contribute to reducing structural responses and improving seismic safety. (C) 2018 Elsevier Ltd. All rights reserved.

关键词： fluid-structure interaction AP1000 nuclear power plant Seismic performance Time history analysis Finite element

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Numerical study and comparison of alternative time discretization schemes for an ultrasonic guided wave propagation problem coupled with fluid-structure interaction

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COMPUTERS & MATHEMATICS WITH APPLICATIONS 2019年第9期78卷 2867-2885页

作者： Hai, Bhuiyan Shameem Mahmood Ebna Bause, Markus Helmut Schmidt Univ Fac Mech Engn Chair Numer Math Hamburg Germany

Discretization is a crucial step in the numerical treatment of coupled multiphysics problems. In the present paper, we focus on the numerical solution of ultrasonic guided waves (UGWs) propagation problem coupled with fluid-structure interaction. We track UGWs propagation through fluid, solid and their interface, where the structure is in motion. Discretization is done via a Finite Element method. For this, we follow the Rothe method, in which discretization in time is followed by space discretization, solving the resulting problem according to the monolithic approach. Further, we provide a systematic analysis of alternative discretization schemes, time-steps, and mesh refinements. Specifically, we contrast one first-order time discretization scheme (cf. backward Euler) and three second-order schemes (cf. Crank-Nicolson, shifted Crank-Nicolson, and fractional-step-theta). First, we establish the robustness of the convergence result. Second, we estimate the experimental order of convergence for alternative schemes and space-time discretization combinations. (C) 2019 Elsevier Ltd. All rights reserved.

关键词： Multiphysics fluid-structure interaction Ultrasonic guided waves propagation Galerkin finite element method Arbitrary Lagrangian-Eulerian technique Time discretization schemes

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Numerical modeling of fluid-structure interaction between sewage water flow and bar screen to improve the screening process

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WATER AND ENVIRONMENT JOURNAL 2019年第4期33卷 560-573页

作者： Ali, Haider Kim, Kyung Won Bang, Sung Gi Chae, Hyun Bae Shin, Seung Wook Park, Cheol Woo Kyungpook Natl Univ Sch Mech Engn 80 Daehakro Daegu 41566 South Korea I ENTEC Co Ltd Daegu South Korea

A self-cleaning bar screen is often used in the first filtration level of a wastewater treatment plant to screen out solid debris from sewage water. The screening process of the bar screen was numerically investigated using the arbitrary Lagrangian-Eulerian method to model the fluid-structure interaction between the sewage water and bar screen. The bar screen design is improved by installing a rotating subscreen under the bar screen to prevent solid waste from passing through. The effects of bar screen on the water flow were examined using hydrodynamic properties. The structural properties were estimated to observe the effects of water flow on the parts of the bar screen. Various inlet flow rates and positions of subscreen and rake were used to examine their effects on velocity, pressure coefficient, structural deformation and von Mises stress. The screening process decreased with the increase in sewage flow rates. The water flow significantly affected the bar screen when the subscreen and rake are not in contact.

关键词： bar screen deformation fluid-structure interaction pressure coefficient water flow

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