Junchen Liu¹, Feng Zhou¹, Xiaofeng Lu¹, Xiaojin Zhou², Xianjun He¹, Yurou Du³, Fuguo Xia¹, Junfu Zhang⁴, Weiyi Luo^4,*

FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.069772

Abstract In shale gas reservoir stimulation, proppants are essential for sustaining fracture conductivity. However, increasing closing stress causes proppants to embed into the rock matrix, leading to a progressive decline in fracture permeability and conductivity. Furthermore, rock creep contributes to long-term reductions in fracture performance. To elucidate the combined effects of proppant embedding and rock creep on sustained conductivity, this study conducted controlled experiments examining conductivity decay in propped fractures under varying closing stresses, explicitly accounting for both mechanisms. An embedded discrete fracture model was developed to simulate reservoir production under different conductivity decay scenarios, while… More >

Dong Liu¹, Runze Zhang¹, Anjie Hu¹, Na Liu¹, Liu Tang^2,3,*, Xiaozhou Wu⁴, Jun Wang^2,5

FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.070407

Abstract This study compares two end-cooling systems, convective–radiant combined cooling (FR+FC) and fan coil convection (FC), through continuous experimental investigations, focusing on the impact of window-to-wall ratio (WWR) on indoor thermal comfort, temperature distribution, humidity, and energy consumption. Results show that increasing WWR amplifies indoor temperature fluctuations. While the overall predicted mean vote (PMV) remains within the Level-II comfort range (−1.0 to +1.0), the FC system exhibits pronounced local PMV gradients near west-facing windows, especially at 80% WWR, where transient PMV reaches 1.26 close to the window, 0.89 higher than at the room center. In contrast, More >

Ning Hu, Cunbiao Lee^*

FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.067248

Abstract The formation, evolution, and dynamics of flow structures in wall-bounded turbulence have long been central themes in fluid-mechanics research. Over the past three decades, Soliton-like Coherent Structures (SCSs) have emerged as a ubiquitous and unifying feature across a wide range of shear flows, including K-type, O-type, N-type, and bypass transitional boundary layers, as well as fully developed turbulent boundary layers, mixing layers, and pipe flows. This paper presents a systematic review of the fundamental properties of SCSs and highlights their fundamental role in multiple transition scenarios. The analysis further explores the connection between SCSs and… More > Graphic Abstract

Bohao Wu^*, Xiuqi Zhang, Haoheng Liu, Yulong Ji

FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.067651

Abstract Geological sequestration of carbon dioxide (CO₂) entails the long-term storage of captured emissions from CCUS (Carbon Capture, Utilization, and Storage) facilities in deep saline aquifers to mitigate greenhouse gas accumulation. Among various trapping mechanisms, dissolution trapping is particularly effective in enhancing storage security. However, the stratified structure of saline aquifers plays a crucial role in controlling the efficiency of CO₂ dissolution into the resident brine. In this study, a two-dimensional numerical model of a stratified saline aquifer is developed, integrating both two-phase flow and mass transfer dynamics. The model captures the temporal evolution of gas saturation,… More >

Feng He^*, Rui Tan, Songlian Jiang, Chao Qian, Chengzhong Bu, Benqiang Wang

FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.070186

Abstract This study introduces a Transformer-based multimodal fusion framework for simulating multiphase flow and heat transfer in carbon dioxide (CO₂)–water enhanced geothermal systems (EGS). The model integrates geological parameters, thermal gradients, and control schedules to enable fast and accurate prediction of complex reservoir dynamics. The main contributions are: (i) development of a workflow that couples physics-based reservoir simulation with a Transformer neural network architecture, (ii) design of physics-guided loss functions to enforce conservation of mass and energy, (iii) application of the surrogate model to closed-loop optimization using a differential evolution (DE) algorithm, and (iv) incorporation of economic… More >

Yu Li^1,2,3,*, Jie Bian³, Liang Zhang^2,3, Xuesong Feng³, Jiachen Hu³, Ji Yu³, Chao Zhou³, Tian Lan³

FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.067685

Abstract As oil and gas development increasingly targets unconventional reservoirs, the limitations of conventional hydraulic fracturing, namely high water consumption and significant reservoir damage, have become more pronounced. This has driven growing interest in the development of clean fracturing fluids that minimize both water usage and formation impairment. In this study, a low-liquid-content viscoelastic surfactant (VES) foam fracturing fluid system was formulated and evaluated through laboratory experiments. The optimized formulation comprises 0.2% foaming agent CTAB (cetyltrimethylammonium bromide) and 2% foam stabilizer EAPB (erucamidopropyl betaine). Laboratory tests demonstrated that the VES foam system achieved a composite foam… More >

Hailong Chen^1,*, Guanzhen Tao¹, Daijun Wei², Guangyao Ouyang³

FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.069569

Abstract Modifications in fuel spray characteristics fundamentally influence fuel–air mixing dynamics in diesel engines, thereby significantly affecting combustion performance and emission profiles. This study explores the operational behavior of RP-5 aviation kerosene/diesel blended fuels in marine diesel engines. A spray visualization platform based on Mie scattering technology was developed to comparatively analyze the spray characteristics, ignition behavior, and soot emissions of RP-5 aviation kerosene, conventional-35# diesel, and their blends at varying mixing ratios (D100H0, D90H10, D70H30, D50H50, D30H70, D0H100). The findings demonstrate that, under constant injection pressure, aviation kerosene combustion results in a more uniform temperature More >

Shuxun Li^1,2, Xinhao Liu^1,2,*, Yu Zhang^1,2, Yu Zhao^1,2

FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.068674

Abstract Hydraulic control valves, positioned at the terminus of pipe networks, are critical for regulating flow and pressure, thereby ensuring the operational safety and efficiency of pipeline systems. However, conventional valve designs often struggle to maintain effective regulation across a wide range of system pressures. To address this limitation, this study introduces a novel Pilot hydraulic valves specifically engineered for enhanced dynamic performance and precise regulation under variable pressure conditions. Building upon prior experimental findings, the proposed design integrates a high-fidelity simulation framework and a surrogate model-based optimization strategy. The study begins by formulating a comprehensive… More >

Zhengzheng Cao^1,2,3, Fangxu Guo¹, Wenqiang Wang^2,3,4,*, Feng Du^2,3,4, Zhenhua Li^2,3,4, Shuaiyang Zhang¹, Qixuan Wang¹, Yongzhi Zhai¹

FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.070624

Abstract With the depletion of shallow mineral resources, mining operations are extending to greater depths and larger scales, increasing the risk of water inrush disasters, particularly from confined aquifers intersected by faults. This paper reviews the current state of research on fault-induced water inrushes in mining faces, examining the damage characteristics and permeability of fractured floor rock, the mechanical behavior of faults under mining stress, and the mechanisms driving water inrush. Advances in prevention technologies, risk assessment, and prediction methods are also summarized. Research shows that damage evolution in fractured floor rock, coupled with fluid-solid interactions,… More > Graphic Abstract

Jialong Jiao¹, Mengyun Jiang¹, Hang Xie^2,3,*, Yuanming Chen¹

FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.069064

Abstract The growing demand for ocean space has generated significant interest in multi-body floating systems, where gap resonance in confined regions plays a critical role in ensuring the safety of offshore operations. This study develops a numerical tank model using the Smoothed Particle Hydrodynamics (SPH) method, implemented through the open-source code DualSPHysics, to investigate hydrodynamic resonance in a twin-floater system and to examine the influence of internal tank sloshing on its hydrodynamic characteristics. The hydrodynamic behavior of the gap flow between a fixed twin-floater system in the numerical tank is validated through systematic comparison with experimental… More >