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Implementation and Validation of an Original OpenFOAM Code for fluid-structure interaction Problems in Compressible Flow

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ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2025年第4期50卷 2335-2350页

作者： Benhamou, Abdessoufi Belghoula, Samir Miloud Lab Mech & Energy LME Chlef 02000 Algeria Hassiba Benbouali Univ Fac Technol Dept Mech Engn Chlef 02000 Algeria Hassiba Benbouali Univ Fac Civil Engn Dept Hydraul BP 78C Chlef 02180 Algeria

Simulating interactions involving compressible fluids with potential shock waves and highly deformable structures demands the precise capture of flow dynamics and structural responses. This coupling must effectively manage substantial deformations while adapting to changes in the fluid domain's topology. This study focuses on the rhoSonicFsiFoam solver, developed using the open-source computational fluid dynamics (CFD) software, OpenFOAM. The computational approach addresses aeroelasticity, fluid compressibility and advanced coupling. Two tests were performed, with the first involving the beating of a thin plate in supersonic flow and the second featuring the interaction of a shock wave with a deformable plate. In the flutter test, simulation results intimately matched the theoretical Mach number of 2.2677, indicating a strong alignment between the numerical results of this present study (M infinity num is an element of 2.26,2.27\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$M_{\infty }<^>{{{\text{num}}}} \in \left] {2.26,2.27} \right[$$\end{document}) and theoretical expectations. Additionally, simulation results from the computational approach closely align with theoretical projections for plate fluttering and correlate well with experimental and numerical outcomes from the T80 shock tube. This project aims to unravel fluid-structure interaction by combining a robust solution method with the latest advancements in CFD. Leveraging this platform, the computational approach accurately captures aeroelastic phenomena, including shock waves and deformations during interactions with compressible fluid and deformable structures. Implications span aerospace, defense and energy sectors. In conclusion, this study underscores the pivotal role of advanced simulation techniques in comprehending int

关键词： fluid-structure interaction Compressible flow Aeroelasticity Numerical simulation rhoSonicFsiFoam

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Reduced-order model of geometrically nonlinear flexible structures for fluid-structure interaction applications

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INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS 2024年 158卷

作者： Flament, T. Deu, J. -F. Placzek, A. Balmaseda, M. Tran, D. -M. Univ Paris Saclay DAAA ONERA F-92322 Chatillon France HESAM Univ LMSSC Cnam EA4626 F-75003 Paris France Univ Paris Saclay DAAA ONERA F-92190 Meudon France

This paper deals with the numerical computation, via a reduced order models (ROM), of the vibrations of geometrically nonlinear structures triggered by the aeroelastic coupling with a fluid flow. The formulation of the ROM proposed in this paper is based on the projection on a basis of reduced dimension enhanced with dual modes. An explicit expression of the projected nonlinear forces is computed in a non-intrusive way based on the Implicit Condensation method. The resulting ROM is an improvement of the classical ICE method since the effects of membrane stretching are taken into account in the resolution of the dynamic equation of motion. Such a ROM aims to be adapted to follower aerodynamic unsteady loads. The construction of the ROM is first detailed and validated under several load cases on a Euler-Bernoulli beam with von Karman hypothesis. Then a fluid-structure partitioned coupling on a two-dimensional example involving vortex-induced vibrations is considered to demonstrate the capability of such ROM to replace a nonlinear FE solver. In this paper, the limitations of the ICE method are highlighted in the examples treated, while the ROM proposed overcomes such limitations and captures accurately the dynamics.

关键词： Computational dynamics Geometric nonlinearity Nonlinear model order reduction fluid-structure interaction Aeroelasticity Dual modes Euler-Bernoulli/von Karman beam

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Condensation solution method for fluid-structure interaction dynamic models of structural system

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JOURNAL OF fluidS AND structureS 2024年 131卷

作者： Hu, Yu Song, Zhiguang Carrera, Erasmo Harbin Engn Univ Coll Aerosp & Civil Engn Harbin 150001 Peoples R China Politecn Torino Dept Mech & Aerosp Engn Corso Duca Abruzzi 24 I-10129 Turin Italy

In the fluid-structure dynamic analysis, the low solution efficiency seriously restricts the passive and active vibration control of structures. But so far, this issue has not been well addressed. Component mode synthesis (CMS) is an efficient method for dynamic analysis of structures. However, since the concept of mode for the fluid is very weak, the CMS is not suitable for solving fluid-structure interaction dynamic problems. Another type of dimension reduction method is dynamic condensation originating from Guyan method. In this paper, introducing the idea of CMS and combining the Guyan method, an efficient condensation solution method is proposed to solve the fluid-structure interaction dynamic models. In the dynamical modeling, both the structure field and fluid field are discretized using 20-node three dimensional elements. The elemental fluid-structure interaction equations of motion are formulated using the Hamilton principle and weighted residual method. The solid and fluid fields are divided into substructures, and all the degrees of freedom (DOFs) of the two fields are divided into interior structure DOFs, boundary structure DOFs, interior master fluid DOFs, interior salve fluid DOFs, as well as boundary fluid DOFs. In the solid substructures, higher orders of mode are neglected to realize a large-scale dimensional reduction, while for the fluid field, the slave DOFs are replaced by the master DOFs. To conduct the verification of the present method, experiment is carried out. The comparison results show the high accuracy and efficiency of the condensation solution method.

关键词： Wet mode fluid-structure interaction Component mode synthesis Finite element method Guyan method

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A finite element framework for fluid-structure interaction of turbulent cavitating flows with flexible structures

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COMPUTERS & fluidS 2024年 277卷

作者： Darbhamulla, Nihar B. Jaiman, Rajeev K. Univ British Columbia Dept Mech Engn Vancouver BC V6T 1Z4 Canada

We present a finite element framework for the numerical prediction of cavitating turbulent flows interacting with flexible structures. The vapor-fluid phases are captured through a homogeneous mixture model, with a scalar transport equation governing the spatio-temporal evolution of cavitation dynamics. High-density gradients in the two-phase cavitating flow motivate the use of a positivity-preserving Petrov-Galerkin stabilization method in the variational framework. A mass transfer source term introduces local compressibility effects arising as a consequence of phase change. The turbulent fluid flow is modeled through a dynamic subgrid-scale method for large eddy simulations. The flexible structure is represented by a set of eigenmodes, obtained through a modal decomposition of the linear elasticity equations. While a partitioned iterative approach is adopted to couple the structural dynamics and cavitating fluid flow, the deforming flow domain is described by an arbitrary Lagrangian-Eulerian frame of reference. We establish the fidelity of the proposed framework by comparing it against experimental and numerical studies for both rigid and flexible hydrofoils in cavitating flows. Under unstable partial cavitating conditions, we identify specific vortical structures leading to cloud cavity collapse. We further explore features of cavitating flow past a rigid body such as re-entrant jet and turbulence-cavity interactions during cloud cavity collapse. Based on the validation study conducted over a flexible NACA66 rectangular hydrofoil, we elucidate the role of cavity and vortex shedding in governing the structural dynamics. Subsequently, we identify a broad spectrum frequency band whose central peak does not correlate to the frequency content of the cavitation dynamics or the natural frequencies of the structure, indicating the induction of unsteady flow patterns around the hydrofoil. Finally, we discuss the coupled fluid- structure dynamics during a cavitation cycle

关键词： fluid-structure interaction Cavitation Stabilized finite element Partitioned iterative Large eddy simulation Flexible hydrofoil

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Impact of Cu Pillar Bump Diameter and Solder Material on Reflow Soldering: A Computational Study with Thermal fluid-structure interaction

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JOURNAL OF ELECTRONIC MATERIALS 2024年第2期53卷 834-855页

作者： Lee, Jing Rou Aziz, Mohd Sharizal Abdul Khor, Chu Yee Ishak, Mohammad Hafifi Hafiz Kamarudin, Roslan Ani, F. Che Univ Sains Malaysia Sch Mech Engn Engn Campus Perai 14300 Penang Malaysia Univ Malaysia Perlis Fac Mech Engn & Technol Perlis Malaysia Univ Sains Malaysia Sch Aerosp Engn Engn Campus Perai 14300 Penang Malaysia Western Digital SanDisk Storage Malaysia Sdn Bhd Batu Kawan Malaysia

This paper aims to develop a thermal fluid-structure interaction (FSI) methodology to study the effect of different Cu pillar bump diameters on thermal and mechanical performance during the reflow soldering process. The desktop reflow oven is modeled in ANSYS FLUENT, while the ball grid array (BGA) package assembly is modeled in ANSYS STATIC STRUCTURAL. The accuracy of the simulated reflow temperature profile has been verified by comparing it with the experimental temperature data, according to JEDEC standards. The temperature distributions of solder and Cu pillar bumps are compared. A parametric study has been conducted to analyze the effect of different Cu pillar diameters on the reflow soldering process. By coupling the thermal loads with the structural analysis using thermal FSI, Cu pillar bumps with a diameter of 0.20 mm are found to exhibit the lowest reflow temperature, minimum temperature difference, and minimum deformation and thermal stress, making them the most suitable interconnection joints for flip chip technology. The study also examines the effect of soldering materials on the Cu pillar bump. The findings of this research provide valuable insights into the effects of varying Cu pillar diameters on the reflow soldering process, which can help in the development of more reliable electronic assemblies.

关键词： Copper pillar diameter soldering material reflow soldering process fluid-structure interaction

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A coupled SPH-SPIM solver for fluid-structure interaction with nonlinear deformation

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COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING 2024年 427卷

作者： Yang, Xi Liang, Guangqi Zhang, Guiyong Zhang, Zhifan Sun, Zhe Dalian Univ Technol Sch Naval Architecture State Key Lab Struct Anal Optimizat & CAE Software Dalian 116024 Peoples R China Collaborat Innovat Ctr Adv ship & Deep Sea Explora Shanghai Peoples R China

A robust fluid-structure interaction (FSI) model based on smoothed particle hydrodynamics (SPH) and smoothed point interpolation method (SPIM) is developed in this work. The fluid is solved by the stable and accurate delta+-SPH scheme. The solid is simulated by the edge-based SPIM (ESPIM) which can soften the numerical stiffness by utilizing the generalized gradient smoothing technique. The interaction between the fluid and structure is realized with the help of virtual particles and the pressure integral method. Virtual particles are pre-set inside the solid and they keep with the structure nodes. The fluid exerts external forces on the solid by integrating the pressure alongside the solid boundary segments. In this way, the fluid and solid are free to be discretized with different spatial resolutions. The fluid, solid and FSI solvers are respectively verified. In the situations of complex FSI problems like sloshing, dam-breaking and impacting, the present model performs well in predicting the fluid fields and structural deformations. The obtained results are in good agreement with the reference solutions, which proves its ability.

关键词： fluid-structure interaction delta+SPH ESPIM Nonlinear deformation Interface/free surface

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Mock-up conception for experimentally investigate the creep phenomenon caused by the fluid-structure interaction in a rod bundle

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NUCLEAR ENGINEERING AND DESIGN 2024年 422卷

作者： Vidal, Guilherme Ricciardi, Guillaume Lo Pinto, Emmanuel Faucher, Vincent Lamorte, Nicolas Pacull, Julien Cadarache CEA DES IRESNENucl Technol Dept F-13108 St Paul Lez Duranc France Framatome France 2 Rue Prof Jean Bernard F-69007 Lyon France

Pressurized water reactors (PWRs) are employed worldwide and continue to expand in capacity. They require thorough investigation, particularly concerning their safety and operational efficiency. To ensure these factors, comprehensive research into their various components and an understanding of the diverse phenomena they experience within a PWR are imperative. These phenomena can be of mechanical, thermal, hydraulic, or neutronic nature. Among these components, fuel assemblies (FAs) hold a main role in PWRs. The intricate interplay of these physical factors results in the modification of FAs geometry, specifically permanent elongation and lateral deformations referred to as irradiation creep. The earliest reported occurrence of these deformations dates back to 1994 in Ringhals reactors, where various FAs exhibited distinct deformations (Andersson et al., 2005). Given that these phenomena occur over a time span of months to years in metallic materials, conducting investigations within the confines of a typical laboratory observation period becomes impractical. Consequently, this project proposes an alternative experimental methodology to overcome this challenge, thus gaining a deeper understanding of the fluency phenomenology in FAs behavior. This methodology consists on the design of a reduced-scale test section, capable of replicating the fluid-structure interaction (FSI) responsible for creep, the creation of spacer grids through 3D printing technology, and selection of the appropriate material for the fuel rods (FRs), with an emphasis on macroscopic coupling effects, rather than focusing into the micro-structural response of the material. To experimentally observe the deformation on the FAs, cameras were used to capture images through the time during the test, to catch the displacement of the FRs. The first results showed the mock-up was able to reproduce the FSI causing the creep on the FAs, it was possible to capture the displacement evolution along time, and

关键词： fluid-structure interaction PWR Creep Fuel assembly bow Thermal-hydraulics

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Blade Exit Angle Impact on Centrifugal Pump Performance: Entropy Generation and fluid-structure interaction Analysis

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ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2025年第4期50卷 2509-2525页

作者： Sakran, Hayder Kareem Aziz, Mohd Sharizal Abdul Khor, C. Y. Univ Sains Malaysia Sch Mech Engn Engn Campus Perai 14300 Penang Malaysia Al Muthanna Univ Fac Engn Chem Engn Dept Muthanna Iraq Univ Malaysia Perlis Fac Mech Engn & Technol Perlis Malaysia

Understanding the impact of specific design parameters is essential for enhancing pump functionality and minimizing energy consumption. Alterations in the blade exit angle impact the static pressure, relative velocity, and energy loss within the pump and associated effects on the structural behavior of the impeller. This work investigates the influence of the blade exit angle on the performance, hydraulic, and structural design of the flow passage components of the centrifugal pump. Impeller models with different exit angles (15 degrees, 20 degrees, 30 degrees, 40 degrees, and 55 degrees) were simulated while keeping all other parameters constant. Computational investigations were conducted to examine the flow characteristics of a centrifugal pump with five distinct impellers using the shear stress transport k-omega turbulence model. The numerical investigation was validated with the previous study. The analysis focuses on variations in static pressure, relative velocity, and energy loss. Besides, the energy loss distribution was investigated to determine the total entropy generation (TEG) and entropy generation rate (EGR). The fluid-structure interaction (FSI) for several impeller models was used to examine the effect of the exit angle on the structural properties of the impeller. The results demonstrate that the blade exit angle significantly impacts the pump performance. An increase in blade exit angle has resulted in a rise in head and pressure. Furthermore, the structural behaviors, including the total deformation and equivalent stress, are discussed. The findings of this study provide valuable insights into enhancing energy efficiency and hydraulic design principles of centrifugal pumps.

关键词： Blade exit angle Centrifugal pump Entropy generation method fluid-structure interaction

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Flutter analysis of compressor blades under travelling wave modes using an efficient fluid–structure interaction method

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Chinese Journal of Aeronautics 2023年第11期36卷 221-232页

作者： Kangdi LI Yunxiang DU Zili XU Shizhi ZHAO Lu CHENG State Key Laboratory for Strength and Vibration of Mechanical Structures Xi’an Jiaotong UniversityXi’an 710049China Beijing Institute of Structure and Environment Engineering Beijing 100076China State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Dongfang Steam Turbine Co.LtdDeyang 618000China

Flutter is a self-sustained vibration which could create serious damage to compressor *** the efficiency and accuracy of fluid-structure interaction(FSI)method is crucial to flutter *** efficient FSI method which combines a fast mesh deformation technology and Double-Passage Shape Correction(DPSC)method is proposed to predict blades flutter under traveling wave ***,regarding the fluid domain as a pseudo elastic solid,the flow mesh deformation and blade vibration response can be quickly obtained by solving the governing equations of the holistic system composed of blade and pseudo elastic ***,by storing and updating the Fourier coefficients on the circumferential boundary,the phase-lagged boundary condition is introduced into the computational ***,the aerodynamic stability for the blades of an axial compressor under various Inter-Blade Phase Angle(IBPA)is *** results show that the proposed method can effectively predict the characteristics of aerodynamic damping,aerodynamic force and blade *** a conceptual model is proposed to describe the motion behavior of the shock *** with the multi-passage method,the proposed method obtains almost the same unstable IBPA interval and the blade displacement error is less than 3.4%.But the calculation time is significantly shortened especially in small IBPA cases.

关键词： Flutter Inter-blade phase angle Fast mesh deformation fluid-structure interaction Shock wave

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Reflective boundary conditions coupled with the SPH method for the three-dimensional simulation of fluid-structure interaction with solid boundaries

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JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING 2024年第4期46卷 1-20页

作者： Filho, Carlos Alberto Dutra Fraga Fed Inst Educ Sci & Technol Espirito Santo Vitoria Brazil

fluid-structure interaction occurs, for example, in wave impacts against reservoir walls, coastal structures (offshore platforms in the ocean, bridge piers, and breakwaters), coastal flooding, sloshing phenomenon, tsunamis, and biomedical applications. In the three-dimensional fluid-structure interaction simulation performed by the Lagrangian (meshfree) particle methods, the fluid particles' collisions treatment against solid boundaries using a realistic reflective physical approach, replacing artificial computational techniques (which use fictitious particles and unnatural repulsive forces) is an advance in the treatment of the contours, in the continuum domain. The benchmark study of a three-dimensional dam-breaking flow over a dry bed generating a wave that impacts a tall structure-a rigid obstacle fixed inside the reservoir-using the smoothed particle hydrodynamics method coupled with the reflective boundary conditions is presented in this paper. The findings showed good agreement with the previous literature data, proving the applicability of the reflective technique in the simulation of fluid-structure interaction problems in three-dimensional domains.

关键词： Reflective boundary conditions SPH method fluid-structure interaction Hydrodynamics Three-dimensional domain

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