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 >

Madini O. Alassafi, Syed Hamid Hasan^*

CMES-Computer Modeling in Engineering & Sciences, Vol.144, No.2, pp. 2627-2645, 2025, DOI:10.32604/cmes.2025.064926 - 31 August 2025

Abstract Over the past few years, Malware attacks have become more and more widespread, posing threats to digital assets throughout the world. Although numerous methods have been developed to detect malicious attacks, these malware detection techniques need to be more efficient in detecting new and progressively sophisticated variants of malware. Therefore, the development of more advanced and accurate techniques is necessary for malware detection. This paper introduces a comprehensive Dual-Channel Attention Deep Bidirectional Long Short-Term Memory (DCA-DBiLSTM) model for malware detection and risk mitigation. The Dual Channel Attention (DCA) mechanism improves the model’s capability to concentrate… More >

Ying Zhang^1,2, Chao Dang^1,2,*, Zhiqiang Zhang^1,2

Frontiers in Heat and Mass Transfer, Vol.23, No.4, pp. 1215-1242, 2025, DOI:10.32604/fhmt.2025.067373 - 29 August 2025

Abstract In this study, the flow boiling characteristics of R1234yf in parallel microchannels were experimentally investigated. The experiments were conducted with heat flux from 0 to 550 kW/m², mass flux of 434, 727, and 1015 kg/(m² s), saturation temperatures of 293, 298, and 303 K, and inlet sub-cooling of 5, 10, and 15 K. The analysis of the experimental results provides the following conclusions: a reduced mass flux and lower subcooling correspond to a diminished degree of superheat at the boiling inception wall; conversely, an elevated saturation temperature results in a reduced amount of superheat at the… More >

Zongyu Jie^1,2, Chao Dang^1,2,*, Qingliang Meng ^3,4

Frontiers in Heat and Mass Transfer, Vol.23, No.4, pp. 1053-1089, 2025, DOI:10.32604/fhmt.2025.066792 - 29 August 2025

Abstract With the increasing miniaturization of systems and surging demand for power density, accurate prediction and control of two-phase flow pressure drop have become a core challenge restricting the performance of microchannel heat exchangers. Pressure drop, a critical hydraulic characteristic, serves as both a natural constraint for cooling systems and determines the power required to pump the working fluid through microchannels. This paper reviews the characteristics, prediction models, and optimization measures of two-phase flow pressure drop for low-boiling-point working fluids in microchannels. It systematically analyzes key influencing factors such as fluid physical properties, operating conditions, channel… More >

Haifeng Zhu^1,*, Zhenyu Chen^1,*, Teng Lu¹, Xiaoqin Zhi²

Frontiers in Heat and Mass Transfer, Vol.23, No.4, pp. 1303-1321, 2025, DOI:10.32604/fhmt.2025.065830 - 29 August 2025

Abstract To meet the demand for miniaturized, compact, high-reliability, and long-life cryocoolers in small satellite platforms, the development of a linear Stirling cryocooler has been undertaken. Computational Fluid Dynamics (CFD) numerical simulation software was used to conduct simulation analyses, verifying the impact of porous media channel layout, eccentricity, viscous resistance coefficient of the porous media, and piston position on the designed aerostatic bearing piston employing self-supplied gas bearing technology. The calculation results indicate that both the aerostatic force and leakage increase synchronously with eccentricity, while the two designed gas lift channel layouts are capable of providing… More >

Shih-Lin Lin^*

CMC-Computers, Materials & Continua, Vol.85, No.1, pp. 1365-1382, 2025, DOI:10.32604/cmc.2025.067764 - 29 August 2025

Abstract This paper proposes an integrated multi-stage framework to enhance frequency modulated continuous wave (FMCW) automotive radar performance under high noise and interference. The four-stage pipeline is applied consecutively: (i) an improved independent component analysis (ICA) blindly separates the two-channel echoes, isolating target and interference components; (ii) a recursive least-squares (RLS) filter compensates amplitude- and phase-mismatches, restoring signal fidelity; (iii) variational mode decomposition (VMD) followed by the Hilbert-Huang Transform (HHT) extracts noise-free intrinsic mode functions (IMFs) and sharpens their time-frequency signatures; and (iv) HHT-based beat-frequency estimation reconstructs a clean echo and delivers accurate range information. Finally, More >

Fatih Selimefendigil¹, Kaouther Ghachem^2,*, Hind Albalawi³, Badr M. AlShammari⁴, Lioua Kolsi⁵

CMES-Computer Modeling in Engineering & Sciences, Vol.144, No.1, pp. 899-925, 2025, DOI:10.32604/cmes.2025.066555 - 31 July 2025

Abstract Cooling system design applicable to more than one photovoltaic (PV) unit may be challenging due to the arrangement and geometry of the modules. Different cooling techniques are provided in this study to regulate the temperature of conductive panels that are arranged perpendicular to each other. The model uses two vented cavity systems and one L-shaped channel with ternary nanofluid enhanced non-uniform magnetic field. Their cooling performances and comparative results between different systems are provided. The finite element method is used to conduct a numerical analysis for a range of values of the following: the strength… More >

Ya Li^1,*, Min Deng², Shanyi Hao³, Yucong Lin¹, Yu Lu¹

FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.7, pp. 1611-1622, 2025, DOI:10.32604/fdmp.2025.067497 - 31 July 2025

Abstract The noise generated by high-speed hair dryers significantly affects user experience, with aerodynamic design playing a crucial role in controlling sound emissions. This study investigates the aerodynamic noise characteristics of a commercial high-speed hair dryer through Computational Fluid Dynamics (CFD) analysis. The velocity field, streamline patterns, and vector distribution within the primary flow path and internal cavity were systematically examined. Results indicate that strong interactions between the wake flow generated by the guide vanes and the straight baffle in the rear flow path induce vortex structures near the outlet, which are primarily responsible for high-frequency More >

Sujie Shao, Zhengpu Wang^*, Siya Xu, Shaoyong Guo, Xuesong Qiu

CMC-Computers, Materials & Continua, Vol.84, No.3, pp. 4949-4972, 2025, DOI:10.32604/cmc.2025.065053 - 30 July 2025

Abstract With the exponential growth of mobile terminals and the widespread adoption of Internet of Things (IoT) technologies, an increasing number of devices rely on wireless local area networks (WLAN) for data transmission. To address this demand, deploying more access points (APs) has become an inevitable trend. While this approach enhances network coverage and capacity, it also exacerbates co-channel interference (CCI). The multi-AP cooperation introduced in IEEE 802.11be (Wi-Fi 7) represents a paradigm shift from conventional single-AP architectures, offering a novel solution to CCI through joint resource scheduling across APs. However, designing efficient cooperation mechanisms and… More >

Yifeng Lin^1,2,#, Yuer Yang^1,2,3,#, Jianxiang Xie⁴, Tong Ji⁵, Peiya Li^2,*

CMC-Computers, Materials & Continua, Vol.84, No.2, pp. 2865-2882, 2025, DOI:10.32604/cmc.2025.065362 - 03 July 2025

Abstract Semantic secure communication is an emerging field that combines the principles of source-channel coding with the need for secure data transmission. It is of great significance in modern communications to protect the confidentiality and privacy of sensitive information and prevent information leaks and malicious attacks. This paper presents a novel approach to semantic secure communication through the utilization of joint source-channel coding, which is based on the design of an automated joint source-channel coding algorithm and an encryption and decryption algorithm based on semantic security. The traditional and state-of-the-art joint source-channel coding algorithms are selected More >