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  • Open Access

    ARTICLE

    Simulation of Underground Reservoir Stability of Pumped Storage Power Station Based on Fluid-Structure Coupling

    Peng Qiao1, Shuangshuang Lan1,*, Hongbiao Gu2, Zhengtan Mao1

    CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.2, pp. 1381-1399, 2024, DOI:10.32604/cmes.2023.045662 - 29 January 2024

    Abstract Based on global initiatives such as the clean energy transition and the development of renewable energy, the pumped storage power station has become a new and significant way of energy storage and regulation, and its construction environment is more complex than that of a traditional reservoir. In particular, the stability of the rock strata in the underground reservoirs is affected by the seepage pressure and rock stress, which presents some challenges in achieving engineering safety and stability. Using the advantages of the numerical simulation method in dealing deal with nonlinear problems in engineering stability, in… More > Graphic Abstract

    Simulation of Underground Reservoir Stability of Pumped Storage Power Station Based on Fluid-Structure Coupling

  • Open Access

    ARTICLE

    Study on dynamic response characteristics of radial steel gate under rare earthquake considering fluid structure coupling effect

    Shoujin Shi1, Yifeng Han1, Jianke Hu1, Yida Zhou1, Taoyong Hu1, Yidan Lou1, Jingkun Wang1, Tao Hou2

    Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.39, No.2, pp. 1-8, 2023, DOI:10.23967/j.rimni.2023.04.004 - 24 April 2023

    Abstract The water resources in southwest China is abundant and the seismicity is strong, so it is necessary to study the dynamic response and safety of hydraulic structures under rare earthquake. Taking a typical radial steel gate as an example, a three-dimensional numerical model considering the interaction between water and gate during the earthquake is established. The accuracy and applicability of the model are verified by comparing with the measured results of the dynamic response of Zipingpu dam during the Wenchuan earthquake. Thereafter, the dynamic displacement and stress, and resonance frequency of the radial gate under… More >

  • Open Access

    ARTICLE

    Fluid-Structure Coupled Analysis of the Transient Thermal Stress in an Exhaust Manifold

    Liang Yi1,*, Wen Gang1, Nenggui Pan2, Wangui Wang1, Shengshuai Mo1

    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.11, pp. 2777-2790, 2023, DOI:10.32604/fdmp.2023.021907 - 18 September 2023

    Abstract The development of thermal stress in the exhaust manifold of a gasoline engine is considered. The problem is addresses in the frame of a combined approach where fluid and structure are coupled using the GT-POWER and STAR-CCM+ software. First, the external characteristic curve of the engine is compared with a one-dimensional simulation model, then the parameters of the model are modified until the curve matches the available experimental values. GT-POWER is then used to transfer the inlet boundary data under transient conditions to STAR-CCM+ in real-time. The temperature profiles of the inner and outer walls More >

  • Open Access

    ARTICLE

    Geometrically Nonlinear Flutter Analysis Based on CFD/CSD Methods and Wind Tunnel Experimental Verification

    Changrong Zhang, Hongtao Guo, Li Yu, Binbin Lv, Hongya Xia*

    CMES-Computer Modeling in Engineering & Sciences, Vol.136, No.2, pp. 1743-1758, 2023, DOI:10.32604/cmes.2023.025528 - 06 February 2023

    Abstract This study presents a high-speed geometrically nonlinear flutter analysis calculation method based on the high-precision computational fluid dynamics/computational structural dynamics methods. In the proposed method, the aerodynamic simulation was conducted based on computational fluid dynamics, and the structural model was established using the nonlinear finite element model and tangential stiffness matrix. First, the equilibrium position was obtained using the nonlinear static aeroelastic iteration. Second, the structural modal under a steady aerodynamic load was extracted. Finally, the generalized displacement time curve was obtained by coupling the unsteady aerodynamics and linearized structure motion equations. Moreover, if the… More > Graphic Abstract

    Geometrically Nonlinear Flutter Analysis Based on CFD/CSD Methods and Wind Tunnel Experimental Verification

  • Open Access

    ARTICLE

    Numerical simulation of erosion wear and leakage flow field of gas-solid two-phase flow in a T-shaped pipeline

    Hongwei Yan1, Yi Liu1, Jian Li1, Ziming Kou2, Pengcheng Li1

    Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.2, pp. 1-16, 2022, DOI:10.23967/j.rimni.2022.05.001 - 20 May 2022

    Abstract In the process of natural gas transportation in pipeline, because the natural gas contains mud and sand, the pipeline will undergo erosion wear under the impact of gas-solid two-phase flow. Erosion wear seriously reduces the performance of the inner wall of the pipeline, which is not conducive to the stability of the conveying process and the safe operation of the equipment. Among them, the erosion wear of special pipe fittings such as tee pipe and bend pipe are especially serious. In this paper, the erosion of natural gas T-shaped tee pipeline is simulated by FLUENT… More >

  • Open Access

    ARTICLE

    Optimization of the Air Deck Blasting Parameters on the Basis of the Holmquist-Johnson-Cook Constitutive Model

    Zuoming Yin1,*, Xuguang Wang2, Desheng Wang1, Zhiheng Dang1, Jianfeng Shao3

    FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.2, pp. 257-269, 2022, DOI:10.32604/fdmp.2022.017915 - 16 December 2021

    Abstract The present study considers the so-called air deck blasting, one of the most commonly used techniques for the improvement of blasting efficiency in mining applications. In particular, it aims to improve the operating conditions of large-scale equipment, increase the efficiency of the slope enlarging process, and reduce the mining cost. These objectives are implemented through a two-fold approach where, first, a program for slope enlarging based on the middle air-deck charge blasting-loosening technology is proposed, and second, the physical mechanism responsible for the stress wave attenuation in the rock is analyzed in the framework of More >

  • Open Access

    ARTICLE

    An Experimental and Numerical Study on the Cleaning of Pleated Bag Filters Using Low-Pressure Pulsed-Jets

    Lumin Chen1, Wanying Sun2, Fuping Qian1,*, Can Fang2, Zhimin Zheng1, Qianshuang Zhuang3, Yunlong Han2, Jinli Lu2

    FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.1, pp. 41-56, 2022, DOI:10.32604/fdmp.2022.017523 - 10 November 2021

    Abstract Pulsed-jet cleaning is recognized as the most efficient method to regenerate bag dust collectors traditionally used in industrial processes to control the emission of particulates. In this study, non-woven needle felt filter bags with and without a film coating material have been analyzed considering different geometries (different number N of pairs of pleated filter bag sides) in the frame of dedicated low-pressure pulsed-jet cleaning experiments. The flow structure inside the bag and the response characteristics of its wall have also been analyzed numerically through a computational fluid-dynamics/structural-dynamics (CFD-CSD) unidirectional fluid-solid coupling method. As shown by the… More >

  • Open Access

    ARTICLE

    A Novel Approach for the Numerical Simulation of Fluid-Structure Interaction Problems in the Presence of Debris

    Miaomiao Ren*, Xiaobin Shu

    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.5, pp. 979-991, 2020, DOI:10.32604/fdmp.2020.09563 - 09 October 2020

    Abstract A novel algorithm is proposed for the simulation of fluid-structure interaction problems. In particular, much attention is paid to natural phenomena such as debris flow. The fluid part (debris flow fluid) is simulated in the framework of the smoothed particle hydrodynamics (SPH) approach, while the solid part (downstream obstacles) is treated using the finite element method (FEM). Fluid-structure coupling is implemented through dynamic boundary conditions. In particular, the software “TensorFlow” and an algorithm based on Python are combined to conduct the required calculations. The simulation results show that the dynamics of viscous and non-viscous debris More >

  • Open Access

    ARTICLE

    Effect of the Wall Thickness of the Vessel on FFRCT of Carotid Artery Stenosis

    Long Yu1, Kesong Xu1, Jun Wan2, Haiyan Lu3,*, Shengzhang Wang1,*

    CMES-Computer Modeling in Engineering & Sciences, Vol.121, No.3, pp. 835-844, 2019, DOI:10.32604/cmes.2019.07428

    Abstract Fractional flow reserve (FFR) computed from computed tomography angiography (CTA), i.e., FFRCT has been used in the clinic as a noninvasive parameter for functional assessment of coronary artery stenosis. It has also been suggested to be used in the assessment of carotid artery stenosis. The wall thickness of the vessel is an important parameter when establishing a fluid-structure coupling model of carotid stenosis. This work studies the effect of the vessel wall thickness on hemodynamic parameters such as FFRCT in carotid stenosis. Models of carotid stenosis are established based on CTA image data using computer-aided design… More >

  • Open Access

    ARTICLE

    BEM-FEM Coupling For Acoustic Effects On Aeroelastic Stability Of Structures

    Harijono Djojodihardjo1, Irtan Safari2

    CMES-Computer Modeling in Engineering & Sciences, Vol.91, No.3, pp. 205-234, 2013, DOI:10.3970/cmes.2013.091.205

    Abstract A series of work has been carried out to develop the foundation for the computational scheme for the calculation of the influence of the acoustic disturbance to the aeroelastic stability of the structure. The generic approach consists of three parts. The first is the formulation of the acoustic wave propagation governed by the Helmholtz equation by using boundary element approach, which then allows the calculation of the acoustic pressure on the acoustic-structure boundaries. The structural dynamic problem is formulated using finite element approach. The third part involves the calculation of the unsteady aerodynamics loading on More >

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