Lyu Guanghua¹, Dingxiao Jiao², Abdulrahman AlKassem³, Dakan Ying¹, Rizwan Arshad¹, Jiahua Ni¹, Zhe Liu¹, Syed Hadi Hussain Shah^1,*

FDMP-Fluid Dynamics & Materials Processing, Vol.22, No.4, 2026, DOI:10.32604/fdmp.2026.077648 - 07 May 2026

Abstract Desert photovoltaic, PV, installations experience significant efficiency losses due to dust accumulation, which also promotes localized overheating, known as hotspots, caused by uneven solar irradiance and partial cell shading. These hotspots can accelerate material degradation and increase the risk of permanent panel damage. This study presents an autonomous maintenance strategy based on a cooperative swarm of unmanned aerial vehicles, UAVs, enabling contactless dust removal and active hotspot cooling. The approach combines high-fidelity computational fluid dynamics to characterize aerodynamic downwash for effective dust detachment with fluid–structure interaction analysis to verify the structural integrity of PV panels… More >

Abdou Alzubaidi¹, Khalid Mahmud², Rashid Mehmood^2,*, Siddra Rana³, Mohammed Alkinidri⁴

FDMP-Fluid Dynamics & Materials Processing, Vol.22, No.4, 2026, DOI:10.32604/fdmp.2026.075928 - 07 May 2026

Abstract Flows over rotating disks are central to numerous engineering applications, including turbines, rotating sensors, and advanced cooling devices, where the incoming fluid often strikes the disk at an angle. This study examines magnetohydrodynamic (MHD) oblique slip flow toward a rotating disk, accounting for critical effects such as velocity slip, thermal slip and thermal radiation. In particular, the Cattaneo–Christov heat flux model is used to capture thermal relaxation phenomena, frequently overlooked in prior analyses, while employing a uniform transverse magnetic field to regulate both momentum and heat transfer. Using similarity transformations, the governing nonlinear equations are… More >

Uzma Anis Takkalki¹, Sayed Ahmed Imran Bellary², Sher Afghan Khan³, Abdul Aabid^4,*, Muneer Baig⁴

FDMP-Fluid Dynamics & Materials Processing, Vol.22, No.4, 2026, DOI:10.32604/fdmp.2026.073927 - 07 May 2026

Abstract The rapid development of space transportation systems and high-speed military aircrafts have intensified interest in turbulent separated flows, particularly under transonic and supersonic conditions. Such flows commonly arise downstream of sudden expansions, where separation and subsequent reattachment generate strong shear layers, increased drag, and a low-pressure recirculation region at the base. In this study, the control of base pressure downstream of a sudden expansion is investigated numerically using a passive bullet-shaped rib. A jet issuing from a nozzle is discharged abruptly into a duct of 25 mm diameter, producing a separated flow with pronounced recirculation.… More >

Yisheng Liu^*, Xufeng Sun, Zhifeng Chen

FDMP-Fluid Dynamics & Materials Processing, Vol.22, No.3, 2026, DOI:10.32604/fdmp.2026.077267 - 31 March 2026

Abstract This study addresses the optimization of automated yarn handling in textile manufacturing by examining the related suction process through a combined numerical and experimental approach. In particular, a three-dimensional model of the suction nozzle was coupled with an equivalent linear-elastic beam representation of the yarn, and a Fluent–IDW–Abaqus weakly coupled fluid–structure interaction (FSI) framework was employed to capture the yarn’s release and dynamic response under negative-pressure suction. High-speed imaging experiments validated the simulations, demonstrating excellent agreement in displacements and velocities. According to the results, increasing the initial suction pressure from −0.04 MPa to −0.06 MPa More >

Jiaming Cai^1,2,*, Xiongxiong Wang^1,2, Xianwen Wang^1,2, Zhengyan Zhao^1,2, Youliang Jia^1,2

FDMP-Fluid Dynamics & Materials Processing, Vol.22, No.3, 2026, DOI:10.32604/fdmp.2026.078769 - 31 March 2026

Abstract To address the persistent challenge of dynamic mismatch between wellbore lifting capacity and reservoir fluid supply, and to establish a robust optimization framework for drainage operations in high-water-cut tight sandstone gas reservoirs, this study systematically investigates the graded optimization and dynamic adaptation of drainage gas recovery technologies. Production data from a representative tight gas field were first employed to forecast reservoir performance. The predictive reliability was rigorously validated through high-precision history matching, thereby providing a quantitatively consistent foundation for subsequent wellbore optimization. Building on this characterization, a coupled simulation framework was developed that integrates wellbore… More > Graphic Abstract

Miao Li¹, Ying Zhang¹, Yan Wang¹, Haiyan Zhao^2,*, Yonghu Zhang¹

FDMP-Fluid Dynamics & Materials Processing, Vol.22, No.3, 2026, DOI:10.32604/fdmp.2026.078695 - 31 March 2026

Abstract Slug flow represents one of the most critical and operationally challenging regimes in oil-gas-water multiphase pipelines. To advance both mechanistic understanding and predictive capability, this study integrates physical analysis with data-driven modeling to elucidate the conditions governing slug formation and to enable its rapid and accurate prediction. A systematic review of existing research is first undertaken to clarify the mechanisms responsible for slug initiation. The influences of gas superficial velocity, liquid velocity, liquid viscosity, liquid surface tension, and the axial component of gravity are examined to characterize their roles in interfacial instability and flow transition.… More >

Xujun Gao¹, Wei Chen¹, Bo Ma¹, Rukun Hu¹, Liao Zhang¹, Yongzhi Lei¹, Wenbin Han¹, Yuanji Li², Xiaohu Yang^2,*

FDMP-Fluid Dynamics & Materials Processing, Vol.22, No.3, 2026, DOI:10.32604/fdmp.2026.078389 - 31 March 2026

Abstract Enhancing the efficiency of phase-change heat storage is vital for maximizing the utilization of renewable energy. This study examines the synergistic effect of non-uniformly shaped fins and nanoparticles on the melting performance of phase-change storage tanks. The problem is addressed using a finite volume framework coupled with the enthalpy–porosity method, with the numerical model rigorously validated against experimental data. The analysis explores the influence of varying fin deflection angles and nanoparticle concentrations on melting dynamics. It is shown that a downward fin deflection of 6° reduces melting time to 570 s, representing a 20.8% improvement More > Graphic Abstract

Mingzhi Zhang¹, Qian Zhang², Haonan Zhang², Xuecheng Shang³, Xionghuan Tan², Zheyuan Jiang⁴, Yun Lin¹, Junwei Shu², Tianxing Ma^2,5,*, Liangxu Shen^2,*

FDMP-Fluid Dynamics & Materials Processing, Vol.22, No.3, 2026, DOI:10.32604/fdmp.2026.078178 - 31 March 2026

Abstract The rheological behavior of paste in mine backfilling systems is governed by multiple coupled mechanisms, including particulate structure evolution, time-dependent effects, spatially heterogeneous flow, and scale dependence. As a result, its macroscopic response cannot be adequately described by a single material parameter or purely local constitutive relations. Although significant progress has been made in experimental characterization and empirical modeling, rheological parameters reported under different conditions remain difficult to reconcile, highlighting the limitations of existing models in capturing structural evolution and nonlocal effects. This review provides a concise synthesis of current advances in paste rheology for… More >

Yang Cheng^*, Dajiang Wang, Zhiyang Sun

FDMP-Fluid Dynamics & Materials Processing, Vol.22, No.3, 2026, DOI:10.32604/fdmp.2026.077747 - 31 March 2026

Abstract Accurate diagnosis of liquid loading in gas wells is hindered by inconsistent criteria for identifying the critical liquid-loading condition and by reliance on subjective observation during the development of physical models. To address this issue, controlled laboratory experiments were conducted to investigate pressure fluctuations in gas–liquid two-phase flow under different flow regimes, with the aim of establishing a quantitative criterion to identify such critical conditions. High-frequency pressure signals were collected and analyzed using complementary ensemble empirical mode decomposition (CEEMD). Characteristic parameters describing slug flow, annular flow, and the critical liquid-loading condition were extracted accordingly, including More >

Rong Guo^1,2,3,*, Jie Xiao^1,2, Xuehan Wang⁴, Qi Jiang^1,2

FDMP-Fluid Dynamics & Materials Processing, Vol.22, No.3, 2026, DOI:10.32604/fdmp.2026.077602 - 31 March 2026

Abstract To simultaneously reduce flow-induced noise and enhance hydraulic performance in centrifugal pumps, this study proposes a bionic volute tongue inspired by the serrated trailing-edge morphology of the long-eared owl wing. Hydraulic performance and volute-induced noise are integrated into a unified evaluation framework, enabling multi-objective optimization of the tongue geometry. An orthogonal experimental design coupled with Computational Fluid Dynamics (CFD) and Computational Fluid Acoustics (CFA) is employed to systematically assess the influence of serration parameters. A matrix-based decision method is then used to identify the optimal configuration balancing efficiency, head, and acoustic performance. The optimized design… More > Graphic Abstract