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  • Open Access

    ARTICLE

    A Geometric Model Simplification Strategy for CFD Simulation of the Cockpit Internal Environment

    Meng Zhao1, Jiaao Liu2, Yudi Liu3, Zhengwei Long1,*

    CMES-Computer Modeling in Engineering & Sciences, Vol.142, No.2, pp. 1545-1564, 2025, DOI:10.32604/cmes.2025.058773 - 27 January 2025

    Abstract Computational Fluids Dynamics (CFD) simulations are essential for optimizing the design of a cockpit’s internal environment, but the complex geometric models consume a significant amount of computational resources and time. Arbitrary simplification of geometric models may result in inaccurate calculations of physical fields. To address this issue, this study establishes a geometric model simplification strategy and successfully applies it to a cockpit. The implementation of the whole approach is divided into three steps, summarized in three methods, namely Sensitivity Analysis Method (SAM), Detail Suppression Method (DSM), and Evaluation Standards Method (ESM). Sensitivity analysis of the More >

  • Open Access

    ARTICLE

    Numerical Simulation of Gas-LiquId Flow in a Horizontal Elbow

    Lihui Ma1, Wei Li1, Yuanyuan Wang1, Pan Zhang1, Lina Wang1, Xinying Liu1, Meiqin Dong2, Xuewen Cao2, Jiang Bian3,*

    FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.1, pp. 107-119, 2025, DOI:10.32604/fdmp.2024.058295 - 24 January 2025

    Abstract Gas-liquid flow (GLF), especially slug and annular flows in oil and gas gathering and transportation pipelines, become particularly complex inside elbows and can easily exacerbate pipeline corrosion and damage. In this study, FLUENT was used to conduct 3D simulations of slug and annular flow in elbows for different velocities to assess the ensuing changes in terms of pressure. In particular, the multifluid VOF (Volume of Fraction) model was chosen. The results indicate that under both slug and annular flow conditions, the pressure inside the elbow is lower than the outside. As the superficial velocity More >

  • Open Access

    ARTICLE

    Numerical Study of Cavitating Flows around a Hydrofoil with Deep Analysis of Vorticity Effects

    Shande Li1, Wen’an Zhong1, Shaoxing Yu1, Hao Wang2,*

    FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.1, pp. 179-204, 2025, DOI:10.32604/fdmp.2024.056228 - 24 January 2025

    Abstract This paper aims to numerically explore the characteristics of unsteady cavitating flow around a NACA0015 hydrofoil, with a focus on vorticity attributes. The simulation utilizes a homogeneous mixture model coupled with a filter-based density correction turbulence model and a modified Zwart cavitation model. The study investigates the dynamic cavitation features of the thermal fluid around the hydrofoil at various incoming flow velocities. It systematically elucidates the evolution of cavitation and vortex dynamics corresponding to each velocity condition. The results indicate that with increasing incoming flow velocity, distinct cavitation processes take place in the flow field. More >

  • Open Access

    ARTICLE

    Study of the Transport Behavior of Multispherical Proppant in Intersecting Fracture Based on Discrete Element Method

    Chengyong Peng1, Jianshu Wu1, Mao Jiang1, Biao Yin2,3,*, Yishan Lou2,3

    Energy Engineering, Vol.122, No.1, pp. 185-201, 2025, DOI:10.32604/ee.2024.056062 - 27 December 2024

    Abstract To analyze the differences in the transport and distribution of different types of proppants and to address issues such as the short effective support of proppant and poor placement in hydraulically intersecting fractures, this study considered the combined impact of geological-engineering factors on conductivity. Using reservoir production parameters and the discrete element method, multispherical proppants were constructed. Additionally, a 3D fracture model, based on the specified conditions of the L block, employed coupled (Computational Fluid Dynamics) CFD-DEM (Discrete Element Method) for joint simulations to quantitatively analyze the transport and placement patterns of multispherical proppants in… More > Graphic Abstract

    Study of the Transport Behavior of Multispherical Proppant in Intersecting Fracture Based on Discrete Element Method

  • Open Access

    ARTICLE

    Enhancing Solar Photovoltaic Efficiency: A Computational Fluid Dynamics Analysis

    Rahool Rai1,2,3,*, Fareed Hussain Mangi4, Kashif Ahmed2, Sudhakar Kumaramsay1,5,6,*

    Energy Engineering, Vol.122, No.1, pp. 153-166, 2025, DOI:10.32604/ee.2024.051789 - 27 December 2024

    Abstract The growing need for sustainable energy solutions, driven by rising energy shortages, environmental concerns, and the depletion of conventional energy sources, has led to a significant focus on renewable energy. Solar energy, among the various renewable sources, is particularly appealing due to its abundant availability. However, the efficiency of commercial solar photovoltaic (PV) modules is hindered by several factors, notably their conversion efficiency, which averages around 19%. This efficiency can further decline to 10%–16% due to temperature increases during peak sunlight hours. This study investigates the cooling of PV modules by applying water to their… More >

  • Open Access

    REVIEW

    Advancement in CFD and Responsive AI to Examine Cardiovascular Pulsatile Flow in Arteries: A Review

    Priyambada Praharaj1,*, Chandrakant R. Sonawane2,*, Arunkumar Bongale2

    CMES-Computer Modeling in Engineering & Sciences, Vol.141, No.3, pp. 2021-2064, 2024, DOI:10.32604/cmes.2024.056289 - 31 October 2024

    Abstract This paper represents a detailed and systematic review of one of the most ongoing applications of computational fluid dynamics (CFD) in biomedical applications. Beyond its various engineering applications, CFD has started to establish a presence in the biomedical field. Cardiac abnormality, a familiar health issue, is an essential point of investigation by research analysts. Diagnostic modalities provide cardiovascular structural information but give insufficient information about the hemodynamics of blood. The study of hemodynamic parameters can be a potential measure for determining cardiovascular abnormalities. Numerous studies have explored the rheological behavior of blood experimentally and numerically.… More >

  • Open Access

    ARTICLE

    Numerical Simulation and Optimization of the Gas-Solid Coupled Flow Field and Discharging Performance of Straw Crushers

    Yuezheng Lan1, Yu Zhao2,*, Zhiping Zhai1, Meihua Fan2, Fushun Li2

    FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.11, pp. 2565-2583, 2024, DOI:10.32604/fdmp.2024.053362 - 28 October 2024

    Abstract The quality of crushing, power consumption, and discharging performance of a straw crusher are greatly influenced by the characteristics of its internal flow field. To enhance the straw crusher’s flow field properties and improve the efficiency with which crushed material is discharged, first, the main structural parameters influencing the air flow in the crusher are discussed. Then, the coupled gas-solid flow field in the straw crusher is numerically calculated through solution of the Navier-Stokes equations and application of the discrete element method (DEM). Finally, the discharge performance index of the crusher is examined through detailed More >

  • Open Access

    ARTICLE

    Investigation of the Film Formation in Dynamic Air Spray Painting

    Deqing Han, Yong Zeng*, Jintong Gu, Bin Yan

    FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.10, pp. 2393-2415, 2024, DOI:10.32604/fdmp.2024.053114 - 23 September 2024

    Abstract To accurately predict the film thickness distribution during dynamic spraying performed with air guns and support accordingly the development of intelligent spray painting, the spray problem was analyzed numerically. In particular, the Eulerian-Eulerian approach was employed to calculate the paint atomization and film deposition process. Different spray heights, spray angles, spray gun movement speeds, spray trajectory curvature radii, and air pressure values were considered. Numerical simulation results indicate that the angle of spray painting significantly affects the velocity of droplets near the spray surface. With an increase in the spraying angle, spraying height and spray… More >

  • Open Access

    ARTICLE

    Influence of the Ambient Temperature on the Efficiency of Gas Turbines

    Mahdi Goucem*

    FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.10, pp. 2265-2279, 2024, DOI:10.32604/fdmp.2024.052365 - 23 September 2024

    Abstract In hot and arid regions like the Saharan area, effective methods for cooling and humidifying intake air are essential. This study explores the utilization of a water trickle cooler as a promising solution to meet this objective. In particular, the HASSI MESSAOUD area is considered as a testbed. The water trickle cooler is chosen for its adaptability to arid conditions. Modeling results demonstrate its effectiveness in conditioning air before it enters the compressor. The cooling system achieves a significant temperature reduction of 6 to 8 degrees Celsius, enhancing mass flow rate dynamics by 3 percent More >

  • Open Access

    ARTICLE

    Simulation Study on the Heat Transfer Characteristics of a Spray-Cooled Single-Pipe Cooling Tower

    Kaiyong Hu1,2,*, Zhaoyi Chen1, Yunqing Hu1, Huan Sun1, Zhili Sun1, Tonghua Zou1,3, Jinghong Ning1

    FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.9, pp. 2109-2126, 2024, DOI:10.32604/fdmp.2024.050773 - 23 August 2024

    Abstract The current study focuses on spray cooling applied to the heat exchange components of a cooling tower. An optimization of such processes is attempted by assessing different spray flow rates and droplet sizes. For simplicity, the heat exchanger of the cooling tower is modeled as a horizontal round tube and a cooling tower spray cooling model is developed accordingly using a computational fluid dynamics (CFD) software. The study examines the influence of varying spray flow rates and droplet sizes on the heat flow intensity between the liquid layer on the surface of the cylindrical tube… More > Graphic Abstract

    Simulation Study on the Heat Transfer Characteristics of a Spray-Cooled Single-Pipe Cooling Tower

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