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fluid-structure interaction solver for compressible flows with applications to blast loading on thin elastic structures

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APPLIED MATHEMATICAL MODELLING 2017年 52卷 470-492页

作者： Bailoor, Shantanu Annangi, Aditya Seo, Jung Hee Bhardwaj, Rajneesh Indian Inst Technol Dept Mech Engn Bombay 400076 Maharashtra India Johns Hopkins Univ Dept Mech Engn Baltimore MD 21218 USA

In this study, we report the development and application of a fluid-structure interaction (FSI) solver for compressible flows with large-scale flow-induced deformation of the structure. The FSI solver utilizes a partitioned approach to strongly couple a sharp interface immersed boundary method-based flow solver with an open-source finite-element structure dynamics solver. The flow solver is based on a higher-order finite-difference method using a Cartesian grid, where it employs the ghost-cell methodology to impose boundary conditions on the immersed boundary. Higher-order accuracy near the immersed boundary is achieved by combining the ghost-cell approach with a weighted least squares error method based on a higher-order approximate polynomial. We present validations for two-dimensional canonical acoustic wave scattering on a rigid cylinder at a low Mach number and for flow past a circular cylinder at a moderate Mach number. The second order spatial accuracy of the flow solver was established in a grid refinement study. The structural solver was validated according to a canonical elastostatics problem. The FSI solver was validated based on comparisons with published measurements and simulations of the large-scale deformation of a thin elastic steel panel subjected to blast loading in a shock tube. The solver correctly predicted the oscillating behavior of the tip of the panel with reasonable fidelity and the computed shock wave propagation was qualitatively consistent with the published results. In order to demonstrate the fidelity of the solver and to investigate the coupled physics of the shock-structure interaction for a thin elastic plate, we employed the solver to simulate a 6.4 kg TNT blast loading on the thin elastic plate. The initial conditions for the blast were taken from previously reported field tests. Using numerical schlieren, the shock front propagation, Mach reflection, and vortex shedding at the tip of the plate were visualized during the impact o

关键词： Blast loading Compressible flow Flow-induced deformation fluid-structure interaction Immersed boundary method

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fluid-structure interaction analysis of flow and heat transfer characteristics around a flexible microcantilever in a fluidic cell

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INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER 2016年 75卷 315-322页

作者： Khanafer, Khalil Vafai, Kambiz Gaith, Mohamad Australian Coll Kuwait Dept Mech Engn Safat 13015 Kuwait Univ Michigan Dept Biomed Engn Ann Arbor MI 48109 USA Univ Calif Riverside Dept Mech Engn Riverside CA 92521 USA

This investigation focuses on studying the effect of flow conditions and the geometric variation of the microcantilever's bluff body on the microcantilever detection capabilities within a fluidic device using a finite element fluid-structure interaction model. Such parameters include inlet velocity, flow direction, and height of the microcantilever's supporting system within the fluidic cell. The transport equations are solved using a finite element formulation based on the Galerkin method of weighted residuals. For a flexible microcantilever, a fully coupled fluid-structure interaction (FSI) analysis is utilized and the fluid domain is described by an Arbitrary-Lagrangian-Eulerian (ALE) formulation that is fully coupled to the structure domain. The results of this study showed a profound effect of the magnitude and direction of the inlet velocity and the height of the bluff body on the deflection of the microcantilever. The vibration characteristics were also investigated in this study. This work paves the road for researchers to design efficient microcantilevers that display least errors in the measurements. (C) 2016 Elsevier Ltd. All rights reserved.

关键词： fluidic cell Microcantilever fluid-structure interaction Flow direction

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fluid-structure interaction analysis of an impeller for a high-pressure booster pump for seawater desalination

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JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY 2017年第11期31卷 5319-5328页

作者： Yin, Tingyun Pei, Ji Yuan, Shouqi Osman, Majeed Koranteng Wang, Jiabin Wang, Wenjie Jiangsu Univ Natl Res Ctr Pumps Zhenjiang 212013 Peoples R China Shandong Shuanglun Co Ltd Weihai 264203 Peoples R China

A High-pressure booster pump (HPBP) is an essential piece of equipment in a Seawater reverse osmosis (SWRO) system. As the corerotating component in the HPBP, the impeller operates extensively in a high-pressure and corrosive environment and its work status directly affects the reliability of the pump device. The vibration characteristics of the rotor were analyzed using fluid-structure interaction theory to determine the characteristics that would ensure the long-term safe operation of the HPBP. The stress and deformation analysis was performed on a partitioned solution for an impeller in a moving fluid, and the modal analysis of the impeller was conducted in still fluid based on a monolithic solution. The influence of the impeller shroud thickness on the resulting vibration characteristics was investigated by using three modifications of the impeller. A comparison of the results with the initial impeller geometry was then carried out under partial load operations. Three commonly used materials for an impeller were also evaluated. The three-dimensional turbulent flow was modeled utilizing the SST k-omega turbulence model, and the numerical results were verified by the experimental data. The results show that natural frequency of the 20CrMnTi is the highest among the three materials for each order mode, followed by 00Cr17Ni14Mo2Ti (316L) and HT250Ni2Cr. Increasing the rear shroud thickness would result in a notable reduction in its deformation. Evidently, the thicker the front and rear shrouds, the lower the shroud deformations. Among the three operating points, the displacement fields of the impeller were quite akin. An outward displacement growth was observed within the impeller hub to the outer diameter, thereby leaving both shrouds with a local maximum on the blade passage. Additionally, higher equivalent stress values were observed at the junction between the blade and the shroud. These results reveal the deformation and stress affecting the impeller, which the

关键词： High-pressure booster pump fluid-structure interaction Vibration characteristics Seawater desalination

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fluid-structure interaction analysis of the return pipeline in the high-pressure and large-flow-rate hydraulic power system

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PROGRESS IN COMPUTATIONAL fluid DYNAMICS 2021年第1期21卷 38-51页

作者： Sang, Yong Liu, Pengkun Wang, Xudong Sun, Weiqi Zhao, Jianlong Dalian Univ Technol Sch Mech Engn Linggong Rd 2 Dalian 116024 Peoples R China

This paper aims to investigate the dynamic characteristic of the return pipeline in the high-pressure and large-flow-rate hydraulic power system. First, the geometry model of the pipeline is established, and a one-way coupling fluid structure method is introduced. The modal analyses with empty and filled pipelines are performed and compared. Then, the pipeline resonance phenomenon is investigated, and the response frequency is achieved by the fast Fourier transformation (FFT) analysis, the results are inconsistent with the experiments. Besides, the dynamic response of the pipeline is simulated. Dynamic mesh and user define function (UDF) are adopted, and the pipeline vibration and water hammer phenomenon are observed. Finally, the dynamic characteristics of the pipeline under different fluid velocities and wall thickness are investigated. The results show that the pipeline valve-induced vibration cannot be lightened by reducing the fluid inlet velocity but can be significantly mitigated by increasing the wall thickness.

关键词： fluid-structure interaction FSI pipeline vibration coupling water hammer sliding valve

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fluid-structure interaction simulation of slam-induced bending in large high-speed wave-piercing catamarans

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JOURNAL OF fluidS AND structureS 2018年 82卷 35-58页

作者： McVicar, Jason Lavroff, Jason Davis, Michael R. Thomas, Giles Revolut Design Pty Ltd Hobart Tas Australia Univ Tasmania Hobart Tas Australia UCL London England

A ship in waves may experience a water impact event known as a slam. In this paper, slam-induced bending of wave-piercing catamarans in head seas is predicted by way of fluid-structure interaction simulations. The flow field during slamming of a wave-piercing catamaran is highly non-linear and cannot be accurately captured using potential flow methods as a result of the interactions between the flow fields produced by water entry of the separate demihulls and centre bow. Thus, the Reynolds-Averaged Navier-Stokes (RANS) equations are solved for rigid body motion of a vessel at model-scale. Verification and validation is conducted using model-scale data from a Hydroelastic Segmented Model (HSM). One-way and two-way interactions are computed considering vibration of the hull girder. In the case of one-way interactions, the computed fluid loads affect the structure, but the structural response does not affect the fluid domain solution whereas for the two-way interactions the structural response affects the fluid solution. A new method for capturing the non-linear time variation in added mass is developed and deemed necessary when computing one-way interactions, primarily as a result of the large changes in forward wetted area present for a wave-piercing catamaran. It is shown that two-way interaction simulation is not needed for predicting the slam induced hull girder loads. One-way interaction simulation can therefore be used allowing reduced computational effort. (C) 2018 Elsevier Ltd. All rights reserved.

关键词： Slamming Whipping fluid-structure interaction Hydroelasticity Catamaran Wave-piercing

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fluid-structure interaction analysis of gravity-based structure (GBS) offshore platform with partitioned coupling method

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OCEAN ENGINEERING 2016年 114卷 1-9页

作者： Lim, W. Z. Xiao, R. Y. Swansea Univ Coll Engn Adv Sustainable Mfg Technol ASTUTE Swansea SA2 8PP W Glam Wales London S Bank Univ Sch Built Environm & Architecture Borough Rd London SE1 0AA England

fluid structure interaction (FSI) analysis is of great significance with the advance of computing technology and numerical algorithms in the last decade. This multidisciplinary problem has been expanded to engineering applications such as offshore structures, dam-reservoirs and other industrial applications. The motivation of this research is to investigate the fundamental physics involved in the complex interaction of fluid and structural domains by numerical simulations and to tackle the multiple surface interactions of a one-way coupling FSI GBS engineering case. To solve such problem, the partitioned method has been adopted and the approach is to utilise the advantage of the existing numerical algorithms in solving the complex fluid and structural interactions. The suitability has been validated for both strong and weak coupling methods which are the distinctive partitioned coupling approach. Therefore, with the computational platform of ANSYS FEA, the coupled field methods were adopted in this numerical analysis. Comparisons were made with the results obtained to justify the ability of both strong and weak methods in resolving the one-way coupling example with the potential applications in the field of ocean and marine engineering. (C) 2016 Elsevier Ltd. All rights reserved.

关键词： fluid-structure interaction Offshore structure Partitioned method

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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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fluid-structure interaction analysis on a flexible plate normal to a free stream at low Reynolds numbers

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JOURNAL OF fluidS AND structureS 2012年 29卷 18-34页

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

This paper presents a computational analysis of the fluid-structure interaction, especially for flexible structures. A flexible plate is placed normal to a free stream and the flow around it is simulated to investigate the effects of flexibility on the flow. The lattice Boltzmann method with an immersed boundary technique using a direct forcing scheme is used to simulate the fluid, and a finite element method with Euler beam elements is used to model the flexible plate. The direct forcing scheme of the lattice Boltzmann method is improved for the immersed boundary scheme by introducing the participation ratio of fluid lattices among the interpolated lattices. We compare the results of our proposed scheme with the known results of conventional schemes. Our results show that the flexibility of the plate significantly influences the reduction of the force coefficients induced by the flow. From the unsteady flow around the flexible plate, we find that the St of the flexible plate up to Re < 80 increase regardless of the plate flexibility, but the St in the range of Re > 120 is dependent on the plate flexibility. In the range of Re > 120, the St of a very flexible plate increases with increasing Re, while the St of a rigid plate decrease with increasing Re. (C) 2012 Elsevier Ltd. All rights reserved.

关键词： Lattice Boltzmann method Finite element method fluid-structure interaction Flexible plate

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fluid-structure interaction analysis of a patient-specific right coronary artery with physiological velocity and pressure waveforms

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COMMUNICATIONS IN NUMERICAL METHODS IN ENGINEERING 2009年第5期25卷 565-580页

作者： Torii, Ryo Wood, Nigel B. Hadjiloizou, Nearchos Dowsey, Andrew W. Wright, Andrew R. Hughes, Aiun D. Davies, Justin Francis, Darrel P. Mayet, Jamil Yang, Guang-Zhong Thom, Simon A. McG Xu, X. Yun Univ London Imperial Coll Sci Technol & Med Dept Chem Engn London SW7 2AZ England St Marys Hosp Int Ctr Circulatory Hlth London England Univ London Imperial Coll Sci Technol & Med Royal Soc Wolfson Med Image Comp Lab London SW7 2AZ England St Marys Hosp Dept Radiol London England Imperial Coll NHS Trust London England

Coupled fluid-structure interaction (FSI) analysis of the human right coronary artery (RCA) has been carried out to investigate the effects of wall compliance on coronary hemodynamics. A 3-D model of a stenosed RCA was reconstructed based oil multislice computerized tomography images. A velocity waveform in the proximal RCA and a pressure waveform in the distal RCA of a patient with a severe stenosis were acquired with a catheter delivered wire probe and applied as boundary conditions. The arterial wall was modeled as a Mooncy-Rivlin hyperelastic material. The predicted maximum wall displacement (3.85 mm) was comparable with the vessel diameter (similar to 4 mm), but the diameter variation was much smaller, 0.134 mm at the stenosis and 0.486 mm in the distal region. Comparison of the computational results between the FSI and rigid-wall models showed that the instantaneous wall shear stress (WSS) distributions were affected by diameter variation in the arterial walk increasing systolic blood pressure dilated the vessel and consequently lowered WSS, whereas the opposite occurred When pressure started to decrease. However. file effects of wall compliance on time-averaged WSS (TAWSS) and oscillatory shear index (OSI) were insignificant (4.5 and 2.7% difference in maximum TAWSS and OSI. respectively). Copyright (C) 2009 John Wiley & Sons, Ltd.

关键词： coronary atherosclerosis fluid-structure interaction physiological waveform

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