Open Access
ARTICLE
K. Sinivasan1, N. Vishnu Ganesh1,*, G. Hirankumar2, M. Al-Mdallal Qasem3,*
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.064503
Abstract In this study, an analytical investigation is carried out to assess the impact of magnetic field-dependent (MFD) viscosity on the momentum and heat transfers inside the boundary layer of a Jeffrey fluid flowing over a horizontally elongating sheet, while taking into account the effects of ohmic dissipation. By applying similarity transformations, the original nonlinear governing equations with partial derivatives are transformed into ordinary differential equations. Analytical expressions for the momentum and energy equations are derived, incorporating the influence of MFD viscosity on the Jeffrey fluid. Then the impact of different parameters is assessed, including magnetic More >
Open Access
ARTICLE
Jiangbo Wu1, Siyi Sun1, Xiaoze Du1,2,*
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.064254
Abstract This study explores the aerodynamic performance and flow field characteristics of supercritical carbon dioxide (sCO2) centrifugal compressors under varying operating conditions. In particular, the Sandia main compressor impeller model is used as a reference system. Through three-dimensional numerical simulations, we examine the Mach number distribution, temperature field, blade pressure pulsation spectra, and velocity field evolution, and identify accordingly the operating boundaries ensuring stability and the mechanisms responsible for performance degradation. Findings indicate a stable operating range for mass flow rate between 0.74 and 3.74 kg/s. At the lower limit (0.74 kg/s), the maximum Mach number within… More >
Open Access
REVIEW
Xiao Sun1, Huifan Huang1, Yanjuan Zhao2,*, Lianghuai Tong3,*, Haibin Lin3, Yuliang Zhang4
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.064329
Abstract The reverse operation of existing centrifugal pumps, commonly referred to as “Pump as Turbine” (PAT), is a key approach for recovering liquid pressure energy. As a type of hydraulic machinery characterized by a simple structure and user-friendly operation, PAT holds significant promise for application in industrial waste energy recovery systems. This paper reviews recent advancements in this field, with a focus on pump type selection, performance prediction, and optimization design. First, the advantages of various prototype pumps, including centrifugal, axial-flow, mixed-flow, screw, and plunger pumps, are examined in specific application scenarios while analyzing their suitability… More >
Open Access
ARTICLE
Shourui Wang, Yibo Wang*, Kun Yang, Yu Li, Xin Su
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.062295
Abstract Hydrocolloids are widely used in meat products and pureed foods as they offer thickening and viscosity-enhancing effects that facilitate shaping and improve stability. In this study, the static shear rheological and dynamic viscoelastic properties of pumpkin puree (S) and pork mince (P) with the addition of various hydrocolloids were considered. Dedicated material printing experiments were conducted by means of a three-dimensional printing platform by using a coaxial dual-nozzle for sandwich composite printing of four different materials. In particular, the impact of different process parameters (printing speed 10~30 mm/s, filling density 10%~50%) was assessed in terms… More >
Open Access
ARTICLE
Haichao Zhou*, Wei Zhang, Tinghui Huang, Haoran Li
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.064991
（This article belongs to the Special Issue: Recent Advances in Computational Fluid Dynamics)
Abstract The configuration of a spoiler plays a crucial role in the aerodynamics of a vehicle. In particular, investigating the impact of spoiler design on aerodynamic performance is essential for effectively reducing drag and optimizing efficiency. This study focuses on the 35° Ahmed body as the test model and examines six different spoiler types mounted on its slant surface. Using the Lattice Boltzmann Method (LBM) in XFlow and the Large Eddy Simulation (LES) technique, the aerodynamic effects of these spoilers were analyzed. The numerical approach was validated against published experimental data. Results indicate that aerodynamic drag More >
Open Access
ARTICLE
Weiyang Xie1,2, Cheng Chang1,2, Ziqin Lai1,2,*, Sha Liu1,2, Han Xiao1,2
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.060956
Abstract In the context of post-stimulation shale gas wells, the terms “shut-in” and “flowback” refer to two critical phases that occur after hydraulic fracturing (fracking) has been completed. These stages play a crucial role in determining both the well’s initial production performance and its long-term hydrocarbon recovery. By establishing a comprehensive big data analysis platform, the flowback dynamics of over 1000 shale gas wells were analyzed in this work, leading to the development of an index system for evaluating flowback production capacity. Additionally, a shut-in chart was created for wells with different types of post-stimulation fracture More >
Open Access
REVIEW
Zhengzheng Cao1, Shuaiyang Zhang1, Cunhan Huang2,*, Feng Du3,4, Zhenhua Li3,4, Shuren Wang1, Wenqiang Wang3,4, Minglei Zhai3,4
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.062738
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
Open Access
ARTICLE
Zhiqiang Jiang1, Zili Li1, Bin Liang2, Miao He1, Weishou Hu3, Jun Tang3, Chao Song4, Nanxin Zheng5,*
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.062737
（This article belongs to the Special Issue: Fluid and Thermal Dynamics in the Development of Unconventional Resources II)
Abstract Microbial polysaccharides, due to their unique physicochemical properties, have been shown to effectively enhance the stability of foam fracturing fluids. However, the combined application of microbial polysaccharides and surfactants under high-temperature and high-salinity conditions remain poorly understood. In this study, we innovatively investigate this problem with a particular focus on foam stabilization mechanisms. By employing the Waring blender method, the optimal surfactant-microbial polysaccharide blends are identified, and the foam stability, rheological properties, and decay behavior in different systems under varying conditions are systematically analyzed for the first time. The results reveal that microbial polysaccharides significantly More >
Open Access
ARTICLE
Yan Xiong1, Xiangnan Song1, Jiawei Lu1, Lei Liu2, Yaru Yan3, Xuemin Ye3,*
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.063769
Abstract Enhancing the fermentation efficiency of waste in waste warehouses is pivotal for accelerating the pyrolysis process and minimizing harmful gas emissions. This study proposes an integrated approach, combining hot air injection with dual atomizing nozzles, for the thermal treatment of waste piles. Numerical simulations are employed to investigate the influence of various parameters, namely, nozzle height, nozzle tilt angle, inlet air velocity and air temperature, on the droplet diffusion process, spread area, droplet temperature, and droplet size distribution. The results show that reducing the nozzle height increases the temperature of droplets upon their deposition on… More >
Graphic Abstract
Open Access
ARTICLE
Xiaozong Song*, Jiangbin Liu, Longhua Fei, Wencong Zhang
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.061222
Abstract Ultra-precision components have been widely used to produce advanced optoelectronic equipment. The so-called Electric field enhanced UltraViolet-Induced Jet Machining (EUV-INCJM) is an ultra-precision method that can achieve sub-nanometer level surface quality polishing. This study focuses on the application of the EUV-INCJM with different nozzle structures to a single-crystal of silicon. Two kinds of electro-optic-liquid coupling nozzles with single-jet and multi-jet focusing structures are proposed accordingly. Simulations and experiments have been conducted to verify the material removal performance of these nozzles. The simulation results show that, under the same condition, the flow velocity of the single-jet… More >
Open Access
ARTICLE
Manqing Qian*, Xiyu Chen, Yongming Li
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.061652
（This article belongs to the Special Issue: Fluid and Thermal Dynamics in the Development of Unconventional Resources II)
Abstract Shale reservoirs are characterized by numerous geological discontinuities, such as bedding planes, and exhibit pronounced heterogeneity across rock layers separated by these planes. Bedding planes often possess distinct mechanical properties compared to the surrounding rock matrix, particularly in terms of damage and fracture behavior. Consequently, vertical propagation of hydraulic fractures is influenced by both bedding planes and the heterogeneity. In this study, a numerical investigation into the height growth of hydraulic fractures was conducted using the finite element method, incorporating zero-thickness cohesive elements. The analysis explored the effects of bedding planes, toughness contrasts between layers,… More >
Open Access
ARTICLE
Li-Li Wang*, Hong-Xing Qin, Nan Dong
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.061154
（This article belongs to the Special Issue: Computational Mechanics and Fluid Dynamics in Intelligent Manufacturing and Material Processing Ⅱ)
Abstract The so-called close-coupled gas atomization process involves melting a metal and using a high-pressure gas jet positioned close to the melt stream to rapidly break it into fine, spherical powder particles. This technique, adapted for blast furnace slag granulation using a circular seam nozzle, typically aims to produce solid slag particles sized 30–140 µm, thereby allowing the utilization of slag as a resource. This study explores the atomization dynamics of liquid blast furnace slag, focusing on the effects of atomization pressure. Primary atomization is simulated using a combination of the Volume of Fluid (VOF) method… More >
Open Access
ARTICLE
Baoyu Chen1,2, Meina Li3, Jicheng Zhang1, Wenguo Ma1,*, Yueqi Wang1, Tianchen Pan1, Xuan Liu1
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.060255
Abstract The relative permeability of oil and water is a key factor in assessing the production performance of a reservoir. This study analyzed the impact of injecting a viscosity reducer solution into low-viscosity crude oil to enhance fluid flow within a low-permeability reservoir. At 72°C, the oil-water dispersion solution achieved a viscosity reduction rate (f) of 92.42%, formulated with a viscosity reducer agent concentration (CVR) of 0.1% and an oil-water ratio of 5:5. The interfacial tension between the viscosity reducer solution and the crude oil remained stable at approximately 1.0 mN/m across different concentrations, with the minimum More >
Open Access
ARTICLE
Li Niu1, Yang Wang1,*, Nan Lin2, Yaoying Yue1, Wenbin Fu1, Elzat Tuhanjiang1
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.062623
（This article belongs to the Special Issue: Computational Mechanics and Fluid Dynamics in Intelligent Manufacturing and Material Processing Ⅱ)
Abstract With the widespread use of polyethylene (PE) materials in gas pipelines, the problem related to the aging of these pipes has attracted increasing attention. Especially under complex environmental conditions involving temperature, humidity, and pressure changes, PE pipes are prone to oxidative degradation, which adversely affects their performance and service life. This study investigates the aging behavior of PE pipes used for gas transport under the combined effects of temperature (ranging from 80°C to 110°C) and pressure (0, 0.1, 0.2, and 0.3 MPa). By assessing the characteristics and thermal stability of the aged pipes, relevant efforts… More >
Open Access
ARTICLE
Yongsheng Wang1,2, Xiangwu Lu1, Wei Yuan1,*, Lei Zhang1
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.061052
Abstract This study explores the influence of rotor blade angle on stall inception in an axial fan by means of numerical simulations grounded in the Reynolds-Averaged Navier-Stokes (RANS) equations and the Realizable k-ε turbulence model. By analyzing the temporal behavior of the outlet static pressure, along with the propagation velocity of stall inception, the research identifies distinct patterns in the development of stall. The results reveal that stall inception originates in the second rotor impeller. At a blade angle of 27°, the stall inception follows a modal wave pattern, while in all other cases, it assumes the More >
Open Access
ARTICLE
Fengxia Shi1,2, Pengcheng Wang1,*, Haonan Zhan1, Xiangyun Shi1
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.062244
Abstract To investigate the impact of guide vane geometry—specifically, outlet angle, blade count, and radial height—on the performance of a Pump as Turbine (PAT), radial guide vanes were introduced upstream of the impeller in an IS80-50-315 low-specific-speed centrifugal PAT. Using an orthogonal test design, numerical simulations were conducted on 16 different PAT configurations, and the influence of vane geometry on performance was analyzed through a range analysis to determine the optimal parameter combinations. The results indicate that the number of guide vane blades significantly affects both the hydraulic efficiency and water head of the PAT under More >
Open Access
ARTICLE
Denis Polezhaev*, Alexey Vjatkin, Victor Kozlov
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.062000
（This article belongs to the Special Issue: Non-Equilibrium Processes in Continuous Media)
Abstract The dynamics of fluid and non-buoyant particles in a librating horizontal annulus is studied experimentally. In the absence of librations, the granular material forms a cylindrical layer near the outer boundary of the annulus and undergoes rigid-body rotation with the fluid and the annulus. It is demonstrated that the librational liquefaction of the granular material results in pattern formation. This self-organization process stems from the excitation of inertial modes induced by the oscillatory motion of liquefied granular material under the influence of the gravitational force. The inertial wave induces vortical fluid flow which entrains particles More >
Open Access
ARTICLE
Qi Deng1, Qi Ruan2, Bo Zeng1, Qiang Liu3, Yi Song1, Shen Cheng1, Huiying Tang2,*
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.060311
Abstract Over more than a decade of development, medium to deep shale gas reservoirs have faced rapid production declines, making sustained output challenging. To harness remaining reserves effectively, advanced fracturing techniques such as infill drilling are essential. This study develops a complex fracture network model for dual horizontal wells and a four-dimensional in-situ stress evolution model, grounded in elastic porous media theory. These models simulate and analyze the evolution of formation pore pressure and in-situ stress during production. The investigation focuses on the influence of infill well fracturing timing on fracture propagation patterns, individual well productivity, and… More >
Open Access
ARTICLE
Tao Wang1,2, Haiyang Yu1,*, Jie Gao2, Fei Wang2, Xinlong Zhang3,*, Hao Yang2, Guirong Di2, Pengrun Wang2
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.058865
Abstract Oilfields worldwide are increasingly grappling with challenges such as early water breakthrough and high water production, yet direct, targeted solutions remain elusive. In recent years, chemical flooding techniques designed for tertiary oil recovery have garnered significant attention, with microgel flooding emerging as a particularly prominent area of research. Despite its promise, the complex mechanisms underlying microgel flooding have been rarely investigated numerically. This study aims to address these gaps by characterizing the distribution of microgel concentration and viscosity within different pore structures. To enhance the accuracy of these characterizations, the viscosity of microgels is adjusted More >
Open Access
ARTICLE
Zhi Yang1,2, Xiaohui Zhang1,2,*, Xinting Tong3, Yutang Zhao4, Teng Xia1,2, Hua Wang1,2
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.061737
Abstract In bottom-blown copper smelting processes, oxygen-enriched air is typically injected into the melt through a lance, generating bubbles that ascend and agitate the melt, enhancing mass, momentum, and heat transfer within the furnace. The melt’s viscosity, which varies across reaction stages, and the operating conditions influence bubble size and dynamics. This study investigates the interplay between melt viscosity and bubble diameter on bubble motion using numerical simulations and experiments. In particular, the volume of fluid (VOF) method and Ω-identification technique were employed to analyze bubble velocity, deformation, trajectories, and wake characteristics. The results showed that More >
Open Access
ARTICLE
Yangyang Cao, Jiye Zhang*, Jiawei Shi, Yao Zhang
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.060429
（This article belongs to the Special Issue: Computational Fluid Dynamics: Two- and Three-dimensional fluid flow analysis over a body using commercial software)
Abstract The pantograph area is a critical source of aerodynamic noise in high-speed trains, generating noise both directly and through its cavity, a factor that warrants considerable attention. One effective method for reducing aerodynamic noise within the pantograph cavity involves the introduction of a jet at the leading edge of the cavity. This study investigates the mechanisms driving cavity aerodynamic noise under varying jet velocities, using Improved Delayed Detached Eddy Simulation (IDDES) and Ffowcs Williams-Hawkings (FW-H) equations. The numerical simulations reveal that an increase in jet velocity results in a higher elevation of the shear layer… More >
Open Access
ARTICLE
Yu Zhang1, Shang-Zhen Yu2, Jia-Jia Yu2,3,*
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.057804
Abstract
RP-3 is a kind of aviation kerosene commonly used in hypersonic and scramjet engines due to its superior thermal stability, high energy density, and ability to act as a coolant before combustion. However, it is known that coke can be generated during the cooling process as a carbonaceous deposition on metal walls and its effects on the cooling performance are still largely unknown. To explore the influence mechanism of porous coke on heat transfer characteristics of supercritical RP-3 in the regenerative cooling channel, a series of computational simulations were conducted via a three-dimensional CFD… More >
Open Access
ARTICLE
Shiyao Peng1, Hanwen Zhang1, Chong Chai1, Shilong Xue2, Xiaobin Zhang2,*
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.060452
Abstract The diffusion of hydrogen-blended natural gas (HBNG) from buried pipelines in the event of a leak is typically influenced by soil properties, including porosity, particle size, temperature distribution, relative humidity, and the depth of the pipeline. This study models the soil as an isotropic porous medium and employs a CFD-based numerical framework to simulate gas propagation, accounting for the coupled effects of soil temperature and humidity. The model is rigorously validated against experimental data on natural gas diffusion in soil. It is then used to explore the impact of relevant parameters on the diffusion behavior… More >
Open Access
ARTICLE
Liang Ai1, Mingyue Li2, Lumin Chen1, Yihua Gao2, Yi Sun1, Yue Wu1, Fuping Qian1,*, Jinli Lu2, Naijin Huang3
FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2025.055985
Abstract
In this study, Computational Fluid Dynamics (CFD) together with a component transport model are exploited to investigate the influence of dimensionless parameters, involving the height of the rectifier grid and the installation height of the first catalyst layer, on the flow field and the overall denitration efficiency of a cement kiln’s SCR (Selective catalytic reduction) denitrification reactor. It is shown that accurate numerical results can be obtained by fitting the particle size distribution function to the actual cement kiln fly ash and implementing a non-uniform particle inlet boundary condition. The relative error between denitration More >
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