Huaiqin Liu¹, Meng Li¹, Jianwen Shao², Weishen Zhang¹, Qifan Yang¹, Yutong Li¹, Tian Su^1,3,*, Xuefeng Mei⁴

Structural Durability & Health Monitoring, Vol.19, No.6, pp. 1563-1588, 2025, DOI:10.32604/sdhm.2025.073009 - 17 November 2025

Abstract Rock collapse is a significant geological disaster that poses a serious threat to life and property in mountainous regions worldwide. Investigating the response of protective structures to rockfall impacts can provide valuable references for the design and placement of such structures. In this study, RocPro3D and ABAQUS were employed to comprehensively analyze rockfall movement trajectories and the structural response upon impact. The results indicate that when the impact velocity of rockfall at the protective structure reaches 20–30 m/sec, the corresponding bounce height ranges from 5 to 8 m, and most rockfall accumulates at the slope More > Graphic Abstract

Minghai Zheng¹, Zhaoxia Cui^1,*, Jiang Liu¹, Jianjun Li²

CMES-Computer Modeling in Engineering & Sciences, Vol.145, No.1, pp. 431-455, 2025, DOI:10.32604/cmes.2025.071913 - 30 October 2025

Abstract To accurately depict the strong nonlinear relationship between the viscosity of propellant slurry and shear rate, premix time, and temperature, and to improve the prediction accuracy, based on the sample preparation and experimental measurement of a certain type of propellant, viscosity data under multiple working conditions were obtained as the basic data for the research. By comparing typical models such as support vector regression and random forest, it was found that although the traditional BP neural network was superior to the both, its accuracy was still insufficient. Based on this, a BP model co-optimized by… More >

Surajudeen Sikiru^1,2,*, Jemilat Yetunde Yusuf ³, Hassan Soleimani⁴, Niraj Kumar⁵, Zia ur Rehman⁶, Bonnia N N^1,*

Energy Engineering, Vol.122, No.10, pp. 3917-3960, 2025, DOI:10.32604/ee.2025.067815 - 30 September 2025

Abstract Enhanced oil recovery (EOR) refers to the many methodologies used to augment the volume of crude oil extracted from an oil reservoir. These approaches are used subsequent to the exhaustion of basic and secondary recovery methods. There are three primary categories of Enhanced Oil Recovery (EOR): thermal, gas injection, and chemical. Enhanced oil recovery methods may be costly and intricate; yet, they facilitate the extraction of supplementary oil that would otherwise remain in the reservoir. Enhanced Oil Recovery (EOR) may prolong the lifespan of an oil field and augment the total output from a specific… More >

Miguel A. Millán^1,*, Rubén A. Galindo², Fausto Molina-Gómez¹

CMES-Computer Modeling in Engineering & Sciences, Vol.144, No.3, pp. 2923-2941, 2025, DOI:10.32604/cmes.2025.069356 - 30 September 2025

Abstract Volcanic terrains exhibit a complex structure of pyroclastic deposits interspersed with sedimentary processes, resulting in irregular lithological sequences that lack lateral continuity and distinct stratigraphic patterns. This complexity poses significant challenges for slope stability analysis, requiring the development of specialized techniques to address these issues. This research presents a numerical methodology that incorporates spatial variability, nonlinear material characterization, and probabilistic analysis using a Monte Carlo framework to address this issue. The heterogeneous structure is represented by randomly assigning different lithotypes across the slope, while maintaining predefined global proportions. This contrasts with the more common approach… More >

Guoqiang Long^*, Wenling Chen, Yanghui Ou, Shuting Yang

The International Conference on Computational & Experimental Engineering and Sciences, Vol.33, No.1, pp. 1-1, 2025, DOI:10.32604/icces.2025.010487

Abstract China's marine carbonate rocks are widely distributed, the reservoir is deeply buried, high temperature, high closure pressure, and the reservoir has strong non-homogeneity, porosity and permeability are generally low, while the natural cracks and dissolution pore (hole) is more developed. Currently, carbonate reservoir reforming technology is developing rapidly, and more and more marine carbonates can be developed. The Permian Maokou-Qixia Formation in the Sichuan Basin has good hydrocarbon source rocks of marine carbonates. The Longniusi Hechuan block of Permian Maokou-Qixia Formation develops a set of carbonate reservoirs interacting with leopard dolomite and mud crystal clastic… More >

Xuewei Liu^1,2, Jinze Sun^1,2, Bin Liu^1,2,*, Yongshui Kang^1,2, Yongchao Tian³, Yuan Zhou^1,2, Quansheng Liu⁴

FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.8, pp. 2047-2073, 2025, DOI:10.32604/fdmp.2025.068268 - 12 September 2025

Abstract Grouting is a widely applied technique for reinforcing fractured zones in deep soft rock tunnels. By infiltrating rock fissures, slurry materials enhance structural integrity and improve the overall stability of the surrounding rock. The performance of grouting is primarily governed by the flow behavior and diffusion extent of the slurry. This review considers recent advances in the theory and methodology of slurry flow and diffusion in fractured rock. It examines commonly used grout materials, including cement-based, chemical, and composite formulations, each offering distinct advantages for specific geological conditions. The mechanisms of reinforcement vary significantly across… More >

Yang Yu^1,2, Sheng Fan^1,2, Zhonglin Li^1,2, Zhong He^1,2, Jingwei Liu^3,*, Peng Xu^3,*

FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.8, pp. 1875-1894, 2025, DOI:10.32604/fdmp.2025.066404 - 12 September 2025

Abstract Drilling operations in carbonate rock heavy oil blocks (e.g., in the Tahe Oilfield) are challenged by the intrusion of high-viscosity, temperature-sensitive formation heavy oil into the drilling fluid. This phenomenon often results in wellbore blockage, reduced penetration rates, and compromised well control, thereby significantly limiting drilling efficiency and operational safety. To address this issue, this study conducts a comprehensive investigation into the mechanisms governing heavy oil invasion using a combination of laboratory experiments and field data analysis. Findings indicate that the reservoir exhibits strong heterogeneity and that the heavy oil possesses distinctive physical properties. The… More >

Liang Yin^1,*, Huanqi Zhang², Jie Ding¹, Mehdi Khan¹

FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.8, pp. 1861-1873, 2025, DOI:10.32604/fdmp.2025.064187 - 12 September 2025

Abstract In liquid rocket engines, regenerative cooling technology is essential for preserving structural integrity under extreme thermal loads. However, non-uniform coolant flow distribution within the cooling channels often leads to localized overheating, posing serious risks to engine reliability and operational lifespan. This study employs a three-dimensional fluid–thermal coupled numerical model to systematically investigate the influence of geometric parameters—specifically the number of inlets, the number of channels, and inlet manifold configurations—on flow uniformity and thermal distribution in non-pyrolysis zones. Key findings reveal that increasing the number of inlets from one to three significantly enhances flow uniformity, reducing… More >

Wenxia Cheng¹, Qinliu Cao¹, Bin Yuan¹, Jiale Yan^2,*

CMES-Computer Modeling in Engineering & Sciences, Vol.143, No.3, pp. 3197-3214, 2025, DOI:10.32604/cmes.2025.065041 - 30 June 2025

Abstract As a critical component of pulse solid rocket motors (SRMs), the soft pulse separation device (PSD) is vital in enabling multi-pulse propulsion and has become a breakthrough in SRM engineering applications. To investigate the opening performance of the PSD, an axial PSD incorporating a star-shaped prefabricated defect was designed. The opening process was simulated using peridynamics, yielding the strain field distribution and the corresponding failure mode. A single-opening verification test was conducted. The simulation results showed good agreement with the experimental data, demonstrating the reliability of the peridynamic modeling approach. Furthermore, the effects of the… More >

Zhengzheng Cao¹, Shuaiyang Zhang¹, Cunhan Huang^2,*, Feng Du^3,4, Zhenhua Li^3,4, Shuren Wang¹, Wenqiang Wang^3,4, Minglei Zhai^3,4

FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.5, pp. 1007-1028, 2025, DOI:10.32604/fdmp.2025.062738 - 30 May 2025

Abstract Karst collapse columns typically appear unpredictably and without a uniform spatial arrangement, posing challenges for mining operations and water inrush risk assessment. As major structural pathways for mine water inrush, they are responsible for some of the most frequent and severe water-related disasters in coal mining. Understanding the mechanisms of water inrush in these collapse columns is therefore essential for effective disaster prevention and control, making it a key research priority. Additionally, investigating the developmental characteristics of collapse columns is crucial for analyzing seepage instability mechanisms. In such a context, this paper provides a comprehensive… More > Graphic Abstract