Open Access

REVIEW

Md. Mahbub Alam^*
FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.4, pp. 657-695, 2025, DOI:10.32604/fdmp.2025.060942 - 06 May 2025
Abstract Wind turbines play a vital role in renewable energy production. This review examines advancements in wind turbine blade morphing technologies aimed at enhancing power coefficients, reducing vibrations, and minimizing noise generation. Efficiency, vibration, and noise levels can be optimized through morphing techniques applied to the blade’s shape, leading edge, trailing edge, and surface. Leading-edge morphing is particularly effective in improving efficiency and reducing noise, as flow attachment and separation at the leading edge significantly influence lift and vortex generation. Morphing technologies often draw inspiration from bionic designs based on natural phenomena, highlighting the potential of More >

Graphic Abstract

View

928

Download

460

Open Access

REVIEW

Dapeng Zhang^*, Yifan Xie, Yining Zhang, Zhengjie Liang, Yutao Tian
FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.4, pp. 697-739, 2025, DOI:10.32604/fdmp.2025.061829 - 06 May 2025
Abstract Airfoil structures play a crucial role across numerous scientific and technological disciplines, with the transition to turbulence and stall onset remaining key challenges in aerodynamic research. While experimental techniques often surpass numerical simulations in accuracy, they still present notable limitations. This paper begins by elucidating the fundamental principles of transition, dynamic stall, and airfoil behavior. It then provides a systematic review of six major experimental methodologies and examines the emerging role of artificial intelligence in this domain. By identifying key challenges and limitations, the study proposes strategic advancements to address these issues, offering a foundational More >

Graphic Abstract

View

808

Download

395

Open Access

ARTICLE

Tatyana Lyubimova^1,*, Anatoly Lepikhin², Yanina Parshakova¹, Andrey Bogomolov², Alibek Issakhov³
FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.4, pp. 741-756, 2025, DOI:10.32604/fdmp.2025.061649 - 06 May 2025
（This article belongs to the Special Issue: Non-Equilibrium Processes in Continuous Media)
Abstract The article presents the results of in-kind measurements and numerical modeling of the formation of water characteristics in the Kama River, which is used for technical water supply in the production of potash fertilizers. In the warm season, risks arise that threaten the sustainability of the water supply. It was found that in the summer, when the studied section of the Kama River is backed up by the Kama Hydroelectric Power Station, there is a significant decrease in flow rates, which leads to vertical stratification of water properties. This, in turn, significantly limits the possibilities… More >

View

556

Download

238

Open Access

ARTICLE

Anna Chiara Uggenti¹, Giorgio Rech², Raffaella Gerboni^2,*, Gianmario Ledda², Amedeo Aliberti¹, Claudia Vivalda³, Emanuela Bruno², Andrea Carpignano²
FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.4, pp. 757-782, 2025, DOI:10.32604/fdmp.2025.062347 - 06 May 2025
（This article belongs to the Special Issue: Recent Advances in Computational Fluid Dynamics)
Abstract The paper presents an innovative approach to studying the reuse of a decommissioned natural gas production platform for the seasonal storage and extraction of a hydrogen-methane (H₂-CH₄) mixture from a depleted reservoir. The reuse plan involves removing outdated equipment from the platform’s decks while retaining essential components such as wellheads and separators. Exploiting a depleted reservoir for the injection of an H₂-CH₄ mixture requires a thorough understanding of its specific characteristics. This paper focuses on the engineering approach adopted in the basic design phase for such a conversion, providing recommendations and HSE guidelines. Given the hazardous… More >

View

559

Download

231

Open Access

ARTICLE

Alexey Vjatkin^*, Svyatoslav Petukhov, Victor Kozlov
FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.4, pp. 783-798, 2025, DOI:10.32604/fdmp.2025.062535 - 06 May 2025
（This article belongs to the Special Issue: Non-Equilibrium Processes in Continuous Media)
Abstract Time-averaged thermal convection in a rotating horizontal annulus with a higher temperature at its inner boundary is studied. The centrifugal force plays a stabilizing role, while thermal convection is determined by the “thermovibrational mechanism”. Convective flow is excited due to oscillations of a non-isothermal rotating fluid. Thermal vibrational convection manifests in the form of two-dimensional vortices elongated along the axis of rotation, which develop in a threshold manner with an increase in the amplitude of fluid oscillations. The objective of the present study is to clarify the nature of another phenomenon, i.e., three-dimensional convective vortices… More >

View

627

Download

264

Open Access

ARTICLE

Yuyao Li¹, Mingmin He¹, Mingjie Cai¹, Shiqian Xu^2,*
FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.4, pp. 799-817, 2025, DOI:10.32604/fdmp.2025.062862 - 06 May 2025
（This article belongs to the Special Issue: Fluid and Thermal Dynamics in the Development of Unconventional Resources II)
Abstract In ultra-deep and large well sections, high collapse stresses and diminished annular return velocity present significant challenges to wellbore cleaning. With increasing depth, rising temperature and pressure constrain the regulation of displacement and drilling fluid rheology, impairing the fluid’s capacity to transport cuttings effectively. A precise understanding of cuttings settlement behavior and terminal velocity is therefore essential for optimizing their removal. This study accounts for variations in wellbore temperature and pressure, incorporates non-spherical cuttings and wellbore diameter parameters, and develops accordingly a simplified model to predict terminal settlement velocity. The cuttings carrying ratio is introduced… More >

Graphic Abstract

View

638

Download

241

Open Access

ARTICLE

Shanshan Tang^1,2,*, Zhanbin Li^3,4, Xubin Zhu^1,2, Peng Li³, Zhaoyang Feng^1,2, Guoliang Yang^1,2, Huake Chang^1,2, Zefeng Che^1,2
FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.4, pp. 819-831, 2025, DOI:10.32604/fdmp.2025.057605 - 06 May 2025
Abstract The particle size distribution plays a crucial role in the transportation and deposition of eroded sediments. Gaining insights into the related sorting mechanism can significantly enhance our understanding of such processes. In this study, sand-covered slopes were examined. A controlled indoor rainfall simulation was conducted on loess slopes with a 12° incline and a rainfall intensity of 1.5 mm/min. These slopes were then covered with sand layers of varying thicknesses—0.5, 1.0, and 1.5 cm—to observe their effects. The findings have revealed that as the thickness of the sand cover increases, the content of sediment particles… More >

View

528

Download

238

Open Access

ARTICLE

Wei Dong^1,2,3,4, Fuping Qian^5,*, Gang Li^1,*, Shi’an Zhou⁵, Lei Ding^2,4, Qingda Gao⁵, Xuemin Zeng¹
FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.4, pp. 833-849, 2025, DOI:10.32604/fdmp.2024.056060 - 06 May 2025
Abstract Nitrogen oxides (NO_x) and particulate matter (PM) present significant risks to both human health and environmental sustainability. The Integrated Dust Removal and Denitrification Technology (DRDt) offers a more efficient and cost-effective solution for achieving ultralow industrial flue gas emissions; however, its effectiveness is undermined by low catalyst load rates and poor stability in filter materials. This study addresses these limitations by modifying conventional PTFE filter media (PTFE-Tim) through the incorporation of sodium alginate (SA) and dopamine (DA) as modifiers, resulting in two new filter materials: PTFE–SA–MOF and PTFE–DA–MOF. By optimizing the parameters of an orthogonal experimental… More >

View

693

Download

254

Open Access

ARTICLE

Zhuang Liu^1,*, Tingen Fan¹, Qianli Lu², Jianchun Guo², Renfeng Yang¹, Haifeng Wang¹
FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.4, pp. 851-876, 2025, DOI:10.32604/fdmp.2024.056729 - 06 May 2025
Abstract Thermal shock damage in deep shale hydraulic fracturing can impact fracture propagation behaviors, potentially leading to the formation of complex fractures and enhancing gas recovery. This study introduces a thermal-hydraulic-mechnical (THM) coupled fracture propagation model relying on the phase field method to simulate thermal shock-induced fracturing in the deep shale considering dynamic temperature conditions. The validity of this model is confirmed through comparison of experimental and numerical results concerning the THM-coupled stress field and thermal cracking. Special attention is paid to the interaction of thermal shock-induced fractures in deep shale that contains weak planes. More >

View

834

Download

266

Open Access

ARTICLE

Dongwei Wang^1,*, Wensheng Ma², Weiguo Zhao¹, Rui Cao², Youchao Yang²
FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.4, pp. 877-890, 2025, DOI:10.32604/fdmp.2024.055220 - 06 May 2025
Abstract Cavitation is an unavoidable phenomenon in the operation of centrifugal pumps. Prolonged cavitation can cause significant damage to the components of the flow channel, and in severe cases, it may even interfere with the normal energy exchange processes within the pump. Therefore, effective monitoring of cavitation in centrifugal pumps is crucial. This article presents a study that approaches the issue from an acoustic perspective, using experimental methods to gather and analyze acoustic data at the inlet and outlet of centrifugal pumps across various flow rates, with hydrophones as the primary measuring instruments. Results show that… More >

View

910

Download

413

Open Access

ARTICLE

Yuliang Zhang^1,2,*, Zezhou Yang¹, Lianghuai Tong^3,*, Yanjuan Zhao⁴, Xiaoqi Jia⁵, Anda Han⁶
FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.4, pp. 891-938, 2025, DOI:10.32604/fdmp.2024.059903 - 06 May 2025
Abstract This paper investigates the start-up and shutdown phases of a five-bladed closed-impeller centrifugal pump through experimental analysis, capturing the temporal evolution of its hydraulic performances. The study also predicts the transient characteristics of the pump under non-rated operating conditions to assess the accuracy of various machine learning methods in forecasting its instantaneous performance. Results indicate that the pump’s transient behavior in power-frequency mode markedly differs from that in frequency-conversion mode. Specifically, the power-frequency mode achieves steady-state values faster and exhibits smaller fluctuations before stabilization compared to the other mode. During the start-up phase, as… More >

View

764

Download

304

Open Access

ARTICLE

Anqi Du^1,*, Ming Wen², Jian Yang¹
FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.4, pp. 939-957, 2025, DOI:10.32604/fdmp.2024.058553 - 06 May 2025
（This article belongs to the Special Issue: Fluid and Thermal Dynamics in the Development of Unconventional Resources II)
Abstract Horizontal wells play a crucial role in enhancing shale gas reservoir production. This study employs transient multiphase simulation to investigate the impact of well trajectory on production optimization throughout a well’s life cycle. The research uses OLGA^TM as a simulator to examine six well trajectories: toe-up, toe-down, smooth horizontal, undulated toe-up, undulated toe-down, and undulated horizontal. Initial findings indicate comparable production rates across different trajectories during the early production phase, with toe-up wells showing slightly better performances due to minimal slugging. However, as the reservoir pressure decreases, the well trajectory significantly influences production. Horizontal wells achieve More >

View

731

Download

278

Open Access

ARTICLE

Shuxun Li^1,2, Jianwei Wang^1,2,*, Tingjin Ma¹, Guolong Deng^1,2, Wei Li^1,2
FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.4, pp. 959-988, 2025, DOI:10.32604/fdmp.2025.059570 - 06 May 2025
Abstract In photothermal power (solar energy) generation systems, purging residual molten salt from pipelines using high-pressure gas poses a significant challenge, particularly in clearing the bottom of regulating valves. Ineffective purging can lead to crystallization of the molten salt, resulting in blockages. To address this issue, understanding the gas-liquid two-phase flow dynamics during high-pressure gas purging is crucial. This study utilizes the Volume of Fluid (VOF) model and adaptive dynamic grids to simulate the gas-liquid two-phase flow during the purging process in a DN50 PN50 conventional molten salt regulating valve. Initially, the reliability of the… More >

View

830

Download

314

Open Access

ARTICLE

Li Wang¹, Haipeng Mu¹, Jiming Zhu^2,*, Zhongchang Wang³
FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.4, pp. 989-1005, 2025, DOI:10.32604/fdmp.2025.057931 - 06 May 2025
Abstract To elucidate the relationship between pipeline erosion and wear during slurry transportation, this study considers three key influencing parameters, namely, the ratio of inlet to outlet pipe diameter, the length of the variable diameter section, and the roughness of the pipe wall. The impact of these factors on pipeline erosion and wear is analyzed using a single-factor analysis approach. In particular, the Fluent software is employed to conduct the required numerical simulations for variable diameter elbows of varying morphologies. The results indicate that as the inlet to outlet diameter ratio increases, the wear on… More >

View

796

Download

276