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Study on the dynamic characteristics of the free piston in the ionic liquid compressor for hydrogen refuelling stations by the fluid-structure interaction modelling

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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 2023年第65期48卷 25410-25422页

作者： Jin, Yi Guo, Yi Zhang, Shengtao Jiang, Jiacheng Peng, Xueyuan Xi An Jiao Tong Univ Sch Energy & Power Engn Xian 710049 Peoples R China Shandong Himile Mfg Co LTD 1 Haomai Rd Weifang 261500 Peoples R China Xi An Jiao Tong Univ State Key Lab Multiphase Flow Power Engn Xian 710049 Peoples R China

The ionic liquid compressor is promising for hydrogen refuelling stations, where the dynamic characteristics of the free piston are crucial for adjusting the compressor performance. This paper presents an investigation of the dynamic characteristics of the free piston in the ionic liquid compressor through a fluid-structure interaction modelling in three typical conditions. The results show that in the typical condition with no impact, phenomenons of buffering, oil charging, and oil overflow are observed in the oil pressure variation. Three features are found in the motion curve: asymmetric motion with a delay of reversal due to the buffering effect, variable location of the dead centre, and fluctuation in the piston velocity. When the impact occurs at the TDC, an opposite variation trend is observed in the gas and oil pressure curve. In the typical condition with impact at the BDC, the oil pressure drops below the atmospheric pressure.& COPY;2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

关键词： Hydrogen energy Ionic liquid compressor Free piston fluid-structure interaction Dynamic characteristics

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One-fluid formulation for fluid-structure interaction with free surface

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COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING 2018年第Apr.15期332卷 102-135页

作者： Yang, Liang Imperial Coll London Dept Earth Sci & Engn South Kensington Campus London SW7 2AZ England

A simple and efficient computational framework is presented for the simulation of fluid-structure interaction problems involving rigid body and multiphase flows in the context of hydrodynamics. Unlike existing publications, this method does not solve the general motion of rigid bodies in the Lagrangian form of Newton's law. Derived from the distributed Lagrange multiplier treatment of the rigid body, a new set of governing equations is presented on the fully Eulerian one-fluid formulation. To solve the problem numerically, the complex problem is separated into three parts: balance of the momentum and mass (dynamic problem), evolving of the Heaviside function by the external velocity (geometric problem) and rigid motion projection (kinematic problem). The conservation of mass and momentum is guaranteed by the multiphase fluid solver. The water, air and structure coupling is accomplished by the smeared interface. A new way of initialisation and convection of the rigid Heaviside function is designed for an arbitrary shape. To deal with rigid velocity vector, a linear least square method is proposed. The excellent agreement between the numerical experiment and the reference data from experiments demonstrate the validity and applicability of the new methodology (C) 2017 Elsevier B.V. All rights reserved.

关键词： One-fluid formulation fluid-structure interaction Heaviside initialisation and interpolation Linear least square projection Water impact

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A method for partitioned fluid-structure interaction computation of flow in arteries

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MEDICAL ENGINEERING & PHYSICS 2008年第7期30卷 917-923页

作者： Jarvinen, Esko Raback, Peter Lyly, Mikko Salenius, Juha-Pekka CSC Sci Comp Ltd Espoo Finland Tampere Univ Hosp Div Vasc Surg Tampere Finland

In this paper we apply the artificial compressibility method (ACM) in strongly coupled fluid-structure interaction (FSI) computation of blood flow in an elastic artery. Previously published and here referred to as the ACM/FSI method uses the idea of artificial compressibility by Chorin 1967, except the term of pressure time derivative in the continuity equation is used to mimic the response of the walls, thereby stabilizing the iterative coupling. To reach the aim, we present a new way, the test load method, to improve ACM/FSI computations. In the test load method, the compressibility parameter is computed locally and is based on the mesh deformation of the fluid domain. The functionality of the ACM/FSI coupling with the test load method is demonstrated in an arterial flow simulation, and the combination is shown to provide a robust convergence. In order to get the test cases to correspond better to human physiology, one-dimensional FSI models are combined with the higher dimensional test models. (C) 2007 IPEM. Published by Elsevier Ltd. All rights reserved.

关键词： computational fluid dynamics fluid-structure interaction blood flow elastic artery

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Application of the fluid-structure interaction technique for the analysis of hydrodynamic lubrication problems

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PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY 2013年第8期227卷 888-897页

作者： Wodtke, Michal Olszewski, Artur Wasilczuk, Michal Gdansk Univ Technol Fac Mech Engn PL-80233 Gdansk Poland

fluid-structure interaction technique seems to be one of the most promising possibilities for theoretical analysis of lubrication problems. It allows coupling of different physical fields in one computational task, taking into account the interaction between them. In this article, two sets of fluid-structure interaction analyses focusing on the bearing performance evaluation are presented. One analysis was applied to a water-lubricated journal bearing and the other to a hydrodynamic thrust bearing lubricated with oil. Steady-state operation was considered in both cases. In the presented cases of fluid-structure interaction analyses, all important phenomena accompanying bearing operation are considered, e.g. lubricant flow, structure movements and their deformations as well as heat transfer in case of thrust bearing. The problems encountered during modelling are discussed in this article, as well as the results of calculations: hydrodynamic pressures, gap geometries or temperature profiles.

关键词： Bearing analysis fluid-structure interaction computational fluid dynamic water lubrication cavitation oil lubrication journal bearing thrust bearing

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Full Eulerian finite element method of a phase field model for fluid-structure interaction problem

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COMPUTERS & fluidS 2014年 90卷 1-8页

作者： Sun, Pengtao Xu, Jinchao Zhang, Lixiang Univ Nevada Dept Math Sci Las Vegas NV 89154 USA Penn State Univ Dept Math University Pk PA 16802 USA Kunming Univ Sci & Technol Dept Mech Engn Kunming Yunnan Peoples R China

In this paper we present a full Eulerian model for a dynamic fluid-structure interaction (FSI) problem in terms of phase field approach, and design its full Eulerian finite element discretization and effective iterative method. The present full Eulerian FSI model effectively demonstrates the interaction between fluid flow and solid structure in terms of a uniform system of governing equations defined in a single domain, thus the computational grid is fixed, and the re-meshing and interpolation techniques which are always required by other FSI modeling approaches are no longer needed here. We develop a new stable scheme to discretize the Euler equation of an incompressible hyperelastic structure in Eulerian description, and employ Galerkin/least-square (GLS) stabilization scheme, streamline-upwind/Petrov-Galerkin (SUPG) method, and the second-order backward difference formula (BDF) to solve the derived transient nonlinear system of Navier-Stokes equations and transport equations. Numerical experiment is carried out for a cross spinning around its rotation of axis due to the passing flow field, and the numerical results dramatically show the spinning motion of the cross due to the interaction with the fluid, showing that our model and numerical methods are effective to simulate the dynamic fluid-structure interaction phenomena. (C) 2013 Elsevier Ltd. All rights reserved.

关键词： fluid-structure interaction Full Eulerian model Phase field model Mixed finite element method Deformation gradient tensor Streamline diffusion scheme

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Comparison of uniform and spatially varying ground motion effects on the stochastic response of fluid-structure interaction systems

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STRUCTURAL ENGINEERING AND MECHANICS 2009年第4期33卷 407-428页

作者： Bilici, Yasemin Bayraktar, Alemdar Adanur, Sueleyman Karadeniz Tech Univ Dept Civil Engn TR-61080 Trabzon Turkey

The effects of the uniform and spatially varying ground motions on the stochastic response of fluid-structure interaction system during an earthquake are investigated by using the displacement based fluid finite elements in this paper. For this purpose, variable-number-nodes two-dimensional fluid finite elements based on the Lagrangian approach is programmed in FORTRAN language and incorporated into a general-purpose computer program SVEM, which is used for stochastic dynamic analysis of solid systems under spatially varying earthquake ground motion. The spatially varying earthquake ground motion model includes wave-passage, incoherence and site-response effects. The effect of the wave-passage is considered by using various wave velocities. The incoherence effect is examined by considering the Harichandran-Vanmarcke and Luco-Wong coherency models. Homogeneous medium and firm soil types are selected for considering the site-response effect where the foundation supports are constructed. A concrete gravity dam is selected for numerical example. The S16E component recorded at Pacoima dam during the San Fernando Earthquake in 1971 is used as a ground motion. Three different analysis cases are considered for spatially varying ground motion. Displacements, stresses and hydrodynamic pressures occurring on the upstream face of the dam are calculated for each case and compare with those of uniform ground motion. It is concluded that spatially varying earthquake ground motions have important effects on the stochastic response of fluid-structure interaction systems.

关键词： spatially varying earthquake motion stochastic analysis Lagrangian approach fluid finite element fluid-structure interaction

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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年第Jan.期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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A combined radial basis function based interpolation method for fluid-structure interaction problems and its application on high-speed trains

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ADVANCES IN ENGINEERING SOFTWARE 2019年 131卷 143-152页

作者： Dou Weiyuan Zhang Lele Chen Geng Zhu Wenjie Beijing Jiaotong Univ Sch Mech Elect & Control Engn Beijing 100044 Peoples R China IAV GmbH Rockwellstr 5 D-38518 Gifhorn Germany

In fluid-structure interaction (FSI) problems, accuracy of the data transfer between fluid-structure interfaces is mainly attributed to the element type and discretization density of grids in both fluid and structure domains. To remedy the inaccuracy caused by the prevalently applied solo elemental node interpolation strategy, a novel interpolation method is proposed in the present study. The approach is based on the radial basis function and introduces a weight coefficient through which the centroid and nodes of an element are joined. This way, the interpolation will be conducted in accordance to a weighted summation of both terms. Before it is applied to practice relevant engineering examples, the validity of the formulated approach is first examined by simple 2D and further 3D case studies. Studies have clearly illustrated that, compared to pure element centroid or nodes based interpolation schemes, the established approach is insensitive to the pressure distribution. Meanwhile, in these cases the influence of selected basis functions and mesh densities have been examined in detail. Based on the knowledge gained from these case studies, it further investigated a problem emerged from high-speed trains in which the CFD simulation is validated by the field experiment and the task is to transfer data from the fluid domain to the structure domain. Result of the study shows that for the high speed train model considered which has complicated non-matching grids, the accuracy of data transfer in fluid-structure interaction is highly improved and the maximum of global relative error achieves 2.62%.

关键词： Data transfer fluid-structure interaction Combined elemental center and node interpolation High-speed train CFD

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SPH model for fluid-structure interaction and its application to debris flow impact estimation

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LANDSLIDES 2017年第3期14卷 917-928页

作者： Dai, Zili Huang, Yu Cheng, Hualin Xu, Qiang Tongji Univ Dept Geotech Engn Coll Civil Engn Shanghai 200092 Peoples R China Tongji Univ Key Lab Geotech & Underground Engn Minist Educ Shanghai 200092 Peoples R China China Three Gorges Univ Hubei Key Lab Disaster Prevent & Reduct Yichang 443002 Peoples R China Chengdu Univ Technol State Key Lab Geohazard Prevent & Geoenvironm Pro Chengdu 610059 Peoples R China

On 13 August 2010, significant debris flows were triggered by intense rainfall events in Wenchuan earthquake-affected areas, destroying numerous houses, bridges, and traffic facilities. To investigate the impact force of debris flows, a fluid-structure coupled numerical model based on smoothed particle hydrodynamics is established in this work. The debris flow material is modeled as a viscous fluid, and the check dams are simulated as elastic solid (note that only the maximum impact forces are evaluated in this work). The governing equations of both phases are solved respectively, and their interaction is calculated. We validate the model with the simulation of a sand flow model test and confirm its ability to calculate the impact force. The Wenjia gully and Hongchun gully debris flows are simulated as the application of the coupled smoothed particle hydrodynamic model. The propagation of the debris flows is then predicted, and we obtain the evolution of the impact forces on the check dams.

关键词： Debris flow Impact force Smoothed particle hydrodynamics fluid-structure interaction

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Numerical methods for shape optimal design of fluid-structure interaction problems

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COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING 2024年 432卷

作者： Haubner, Johannes Ulbrich, Michael Karl Franzens Univ Graz Inst Math Heinrichstr 36 A-8010 Graz Austria Tech Univ Munich Boltzmannstr 3 D-85748 Garching Germany

We consider the method of mappings for performing shape optimization for unsteady fluid-structure interaction (FSI) problems. In this work, we focus on the numerical implementation. We model the optimization problem such that it takes several theoretical results into account, such as regularity requirements on the transformations and a differential geometrical point of view on the manifold of shapes. Moreover, we discretize the problem such that we can compute exact discrete gradients. This allows for the use of general purpose optimization solvers. We focus on problems derived from an FSI benchmark to validate our numerical implementation. The method is used to optimize parts of the outer boundary and the interface. The numerical simulations build on FEniCS, dolfin-adjoint and IPOPT. Moreover, as an additional theoretical result, we show that for a linear special case the adjoint attains the same structure as the forward problem but reverses the temporal flow of information.

关键词： fluid-structure interaction Shape optimization Method of mappings Navier-Stokes equations Saint Venant-Kirchhoff type material FSI2 benchmark

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