Fluid Dynamics最新文献_第10页

Comparative Analysis of Heat-Transfer Efficiency in Round and Flat Continuous Diffusers 圆形与平面连续扩散器换热效率的比较分析

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-05 DOI: 10.1134/S0015462825603870

V. G. Lushchik, A. I. Reshmin, A. D. Chicherina

引用次数: 0

The PROCESS Database of Recommended Data in the AVOGADRO System: Recovered Data and Organization of Access AVOGADRO系统中推荐数据的过程数据库：恢复数据和访问组织

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-05 DOI: 10.1134/S0015462825603766

A. L. Sergievskaya, V. Yu. Levashov

引用次数: 0

Effect of Spacing and Canting on Twinjet Characteristics 间距和倾斜对双喷流特性的影响

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-05 DOI: 10.1134/S0015462825603134

K. B. V. Satya Prakash, P. Lovaraju, E. Rathakrishnan

引用次数: 0

Effect of the Hydrogen Blending Ratio on Leakage Diffusion and Explosion Range of Above-Ground Natural Gas Pipelines 掺氢比对地上天然气管道泄漏扩散及爆炸范围的影响

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-05 DOI: 10.1134/S0015462825601822

L. Q. Chen, S. X. Li, J. T. Huang

{"title":"Effect of the Hydrogen Blending Ratio on Leakage Diffusion and Explosion Range of Above-Ground Natural Gas Pipelines","authors":"L. Q. Chen, S. X. Li, J. T. Huang","doi":"10.1134/S0015462825601822","DOIUrl":"10.1134/S0015462825601822","url":null,"abstract":"Hydrogen energy, as a clean and efficient secondary energy, has a broad application prospects under the global energy transition and carbon neutrality goals. Blending hydrogen into the natural gas pipeline is the most technologically viable and economically feasible approach for hydrogen transportation while resulting in more severe leakage consequences. The existing studies mainly focus on buried pipelines, while ignoring above-ground pipelines, which have a wider impact range due to the lack of soil resistance. In this study, the numerical simulation method is used to investigate the effect of the hydrogen blending ratio on leakage diffusion and explosion range of above-ground natural gas pipelines. The results show that the hydrogen blending ratio (HBR) has a small effect on the leakage diffusion range, but a significant effect on the explosion range and the leakage velocity. When the hydrogen blending ratio is less than 10%, the leakage diffusion range, the explosion range, and the leakage velocity are close to the natural gas condition. This study provide theoretical guidance for the selection of the hydrogen blending ratio for natural gas pipelines.","PeriodicalId":560,"journal":{"name":"Fluid Dynamics","volume":"60 7","pages":""},"PeriodicalIF":0.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147337379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of Turbulent Flow Characteristics in Plate Heat Exchangers with Diffuser Channels 扩压通道板式换热器紊流特性研究

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-05 DOI: 10.1134/S0015462825603869

V. G. Lushchik, A. I. Reshmin, A. D. Chicherina

引用次数: 0

Mathematical Models of Spontaneous Rotation of Ice on the Surface of Water 冰在水面上自发旋转的数学模型

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-05 DOI: 10.1134/S0015462825603924

T. O. Chaplina, V. P. Pakhnenko

引用次数: 0

Trailing Edge Modifications for Enhanced Jet Decay: The Effect of Groove Depth on Supersonic Rectangular Nozzles 增强射流衰减的后缘修饰：沟槽深度对超音速矩形喷管的影响

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-05 DOI: 10.1134/S0015462825602268

R. S. Hannah R, G. J. J. Wessley

引用次数: 0

Size-Dependent Impact Dynamics of Water Droplets on Hydrophilic and Hydrophobic Surfaces 水滴在亲水和疏水表面上的尺寸依赖性冲击动力学

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-05 DOI: 10.1134/S0015462825603122

R. Kujur, R. K. Singh

{"title":"Size-Dependent Impact Dynamics of Water Droplets on Hydrophilic and Hydrophobic Surfaces","authors":"R. Kujur, R. K. Singh","doi":"10.1134/S0015462825603122","DOIUrl":"10.1134/S0015462825603122","url":null,"abstract":"The impact behavior of water droplets of varying diameters was systematically examined on the Poly methyl methacrylate (PMMA, hydrophilic) and polystyrene (hydrophobic) surfaces to reveal the role of the droplet size and wettability in spreading and retraction dynamics. High-speed imaging was employed to analyze the maximum spreading diameter, spreading velocity, recoiling velocity, and rebound behavior. The result showed that the maximum spreading diameter was found to increase with droplet size on both substrates, governed by the rise in initial kinetic energy. This effect was more pronounced on the hydrophobic surface, where spreading velocity scaled more sharply with droplet size. A predictive correlation, ({{d}_{{{text{max}}}}}sim {text{W}}{{{text{e}}}^{{0.5}}}D_{0}^{{0.25}}), was proposed by incorporating the wetting effects in terms of initial droplet size. The experimental spreading results were compared with the proposed correlation and four other existing models. The proposed model performed the best, keeping the errors below 10% in all tested conditions. Distinct retraction trends were observed on the two surfaces considered. On the PMMA surface, the spreading velocity remained nearly constant across droplet sizes, while the recoiling velocity decreased as the larger drops lost energy to adhesion and pinning. On the polystyrene surface, the spreading velocity increased with the droplet size as inertia dominated over adhesion, and the larger droplets recoiled more strongly, producing higher rebound and oscillations.","PeriodicalId":560,"journal":{"name":"Fluid Dynamics","volume":"60 7","pages":""},"PeriodicalIF":0.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147337318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluating the Low-Reynolds-Number Models for Predicting Axial Flow in a Tightly-Spaced Square-Pitch Rod Bundle 小间距方节棒束轴流预测的低雷诺数模型的评价

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-05 DOI: 10.1134/S0015462825602001

M. Belharizi

{"title":"Evaluating the Low-Reynolds-Number Models for Predicting Axial Flow in a Tightly-Spaced Square-Pitch Rod Bundle","authors":"M. Belharizi","doi":"10.1134/S0015462825602001","DOIUrl":"10.1134/S0015462825602001","url":null,"abstract":"Single-phase turbulent flow through a subchannel of a tightly spaced rod bundle with a pitch-to-diameter ratio p/d = 1.107 is investigated numerically at the Reynolds number Re = 48 400. Two low-Reynolds-number (LRN) Reynolds-averaged Navier–Stokes (RANS) models were used, namely, the (k{-} omega ~{text{SST}}) model and the ({text{BL}}{-} overline {{{upsilon }^{2}}} {text{/}}k) model, which is an elliptic-blending-based (overline {{{upsilon }^{2}}} {-} f) model implemented in the in-house EDF code−saturne®. The numerical predictions are presented in terms of the mean velocity distribution, the turbulent kinetic energy, and variation in the wall shear stress. These predictions are then compared with experimental results given by Hooper in 1980. The results indicate that both LRN models are capable of predicting specific flow features. Furthermore, the low-Re near-wall treatment successfully reproduces the correct qualitative behavior of the wall shear stress along the rod surface, in agreement with experimental results. However, the (k{-} omega ~{text{SST}}) model demonstrated superior overall performance as compared to the ({text{BL}}{-} overline {{{upsilon }^{2}}} {text{/}}k) model, showing better accuracy in predicting the flow characteristics in this complex configuration.","PeriodicalId":560,"journal":{"name":"Fluid Dynamics","volume":"60 7","pages":""},"PeriodicalIF":0.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147337383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Validation of State-to-State Models of Vibrational–Chemical Kinetics in the Problem of Air Relaxation in the Afterglow 余辉中空气松弛问题中振动化学动力学状态-状态模型的验证

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-05 DOI: 10.1134/S0015462825603894

M. Yu. Melnik, A. A. Kashubo, E. V. Kustova

引用次数: 0