International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 99, P. 1 - 14
Published: Dec. 13, 2024
Language: Английский
International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 105, P. 367 - 381
Published: Jan. 24, 2025
Language: Английский
Citations
4
International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 77, P. 301 - 323
Published: June 17, 2024
Language: Английский
Citations
13
International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 118, P. 300 - 311
Published: March 19, 2025
Language: Английский
Citations
2
Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(2)
Published: Feb. 1, 2025
This work aims to find the optimum value of blade height ratio (R) for improving mixing performance and energy consumption a Triple-Blade Concentric Double-Helix Static Mixer. In this study, two fluids at different concentrations subjected laminar flow conditions is numerically analyzed by using finite element-based Computational Fluid Dynamics simulations. Different values R parameter are considered in wide range Reynolds numbers (Re = 200–1000). analysis then carried out an in-depth study R's effect on performance, strength segregation, index, helicity, velocity profile, pressure drop, pumping power, efficiency. The findings showed that 2/3 gave highest index (MI), with maximum 0.99 Re number 600, which best channel. Helicity visualization also complex helicity patterns increased vortex interactions configuration. geometry improvement MI about 17.85% over Single-Helix Mixer (TB-CSH-SM) 0 600. It important mention increasing leads increase drop and, consequently, consumption. Although gives relatively higher than 0, has lowest power input but lower MI. investigation concludes represents balanced solution since it realizes moderate hence suitable applications requiring efficient compromise between quality
Language: Английский
Citations
1
Materials, Journal Year: 2025, Volume and Issue: 18(8), P. 1879 - 1879
Published: April 20, 2025
As a cost-effective transitional strategy, the integrated utilization and transportation of hydrogen natural gas have gained significant attention as viable pathway toward carbon neutrality. However, hydrogen's low density, viscosity, calorific value cause upward migration accumulation in pipelines, raising embrittlement risks. Its high diffusion leakage rates also pose safety challenges. To address hydrogen-natural blending challenges, achieving uniform mixing is crucial. This study systematically examines hydrogen-methane T-junction pipelines via numerical simulations, analyzing ratios (HMR: 10-25%) methane flow (4-10 m/s) to assess dynamics. The coefficient variation (COV) quantifies uniformity with spatial temporal analyses, optimizing injection for rapid, homogeneous mixing. key findings are follows: (1) length (the minimum axial distance required first pipeline cross-section achieve 95% uniformity) decreases inversely HMR, from 100 D 20.875 (D represents diameter) HMR rises 10% 25%. (2) Analysis initial time (defined duration shows reduction increasing HMR. While rate has less pronounced effect, it nevertheless contributes reducing outlet attain at outlet). (3) A fundamental trade-off engineering applications established: reduces but extends overall (difference between times), while higher shorten cost increased length. primary objective this research elucidate fluid dynamics mixtures providing scientific insights safe efficient operation hydrogen-blended systems.
Language: Английский
Citations
1
International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 86, P. 1118 - 1128
Published: Sept. 4, 2024
Language: Английский
Citations
6
Computational Particle Mechanics, Journal Year: 2025, Volume and Issue: unknown
Published: April 23, 2025
Language: Английский
Citations
0
Processes, Journal Year: 2025, Volume and Issue: 13(6), P. 1666 - 1666
Published: May 26, 2025
Static mixers have been widely used in marine research fields, such as control systems, ballast water treatment and seawater desalination, due to their high efficiency, low energy consumption, broad applicability. However, the turbulent mixing process fluid–wall interactions involving complex structures make transport characteristics of static nonlinear, which affect efficiency stability fluid device. Here, modeling design optimization two-phase flow dynamics a mixer face many challenges. This paper proposes problem-solving method for mixers, based on lattice Boltzmann (LBM) large eddy simulation (LES). The strategies component are analyzed. First, model is set up, LBM multiple-relaxation-time wall-adapting local (MRT-WALE) vortex viscosity coupling model. Using octree block refinement technology, interaction mechanism between wall during explored. Then, field analyzed under different rates element configurations improve stability. results indicate that proposed methods can reveal dynamic evolution mixed-flow fields. Blade components main driving force behind increased kinetic induced formation, enhancing macroscopic effect. Moreover, variations velocity blade angles important factors affecting system pressure drop. If inlet 3 m/s angle 90°, exhibits optimized overall performance. quantitative analysis shows increasing from 80° 100° reduces drop by approximately 44%, while raising 15 lowers outlet COV value about 70%, indicating enhanced uniformity. These findings confirm an combined with 90° provides optimal trade-off performance efficiency.
Language: Английский
Citations
0
Journal of Mechanical Science and Technology, Journal Year: 2025, Volume and Issue: unknown
Published: May 30, 2025
Language: Английский
Citations
0
International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 140, P. 286 - 297
Published: May 30, 2025
Language: Английский
Citations
0