Showing 501 - 520 results of 926 for search '"turbulence"', query time: 0.07s Refine Results
  1. 501

    3-D Viscous Flow Analysis of a Mixed Flow Pump Impeller by Steven M. Miner

    Published 2001-01-01
    “…A commercial computational fluid dynamics code (FLOTRAN) is used to solve the 3-D Reynolds Averaged Navier Stokes equations in a rotating cylindrical coordinate system. The standard k-ε turbulence model is used. The mesh for this study uses 26,000 nodes and the model is run on a SPARCstation 20. …”
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  2. 502

    Numerical Simulation on the Boiling Flow Patterns of Al2O3-Water Nanofluid in Micro/Minichannel under Different Hypergravity Levels and Directions by Gen Li, Xiande Fang

    Published 2021-01-01
    “…The VOF approach is employed for present simulation, and the standard κ−ε turbulence model with nonequilibrium wall function is used. …”
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  3. 503

    The Entrepreneurial perception of the small enterprise environment by P. Tomski, E. Wysłocka

    Published 2019-08-01
    “…Although they were not directly asked about the level of turbulence of the environment, the obtained results, maintaining the characteristics of the environment in the middle of the scales (dynamism, hostility, heterogeneity) indicate that this environment is not perceived in a drastic and pessimistic manner.…”
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  4. 504

    Fatigue Performance Optimization of the Wind Turbine Gearbox Transmission System Considering Environmental Parameters by Tan Jianjun, Wu Yuan, Bai Yang, Zhu Caichao, Song Chaosheng, Dong Yehong

    Published 2023-08-01
    “…The mapping relationship among wind turbulence intensity-gear modification parameter-gear long-term contact fatigue damage is reconstructed by the surrogate model method based on the dynamic model of the wind turbine transmission system considering global loads. …”
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  5. 505

    Impact of Weather Factors on Unmanned Aerial Vehicles’ Wireless Communications by Lalan Mishra, Naima Kaabouch

    Published 2025-01-01
    “…However, adverse weather conditions caused by atmospheric gases, clouds, fog, rain, and turbulence pose challenges by degrading communication signals. …”
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  6. 506

    A Cloud Detection System for UAV Sense and Avoid: Analysis of a Monocular Approach in Simulation and Flight Tests by Adrian Dudek, Peter Stütz

    Published 2025-01-01
    “…Cloud avoidance is motivated by several factors, including improving visibility for collision prevention and reducing the risks of icing and turbulence. The described workflow is based on parallelized detection, tracking and triangulation of features with prior segmentation of clouds in the image. …”
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  7. 507

    Sound Radiation Analysis of a Front Side Window Glass of DrivAer Model under Wind Excitation by Yinzhi He, Zihao Shi, Yu Wu, Zhigang Yang

    Published 2018-01-01
    “…To study the car radiated noise caused by turbulent pressure fluctuation on the side glass under wind excitation, a clay model of DrivAer was constructed except that the front left side window was built with real glass. …”
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  8. 508

    Numerical and Experimental Studies of Cavitation Behavior in Water-Jet Cavitation Peening Processing by H. Zhang, B. Han, X.G. Yu, D.Y. Ju

    Published 2013-01-01
    “…The cavitation behavior in this process involves complex and changeable physics phenomena, such as high speed, high pressure, multiple phases, phase transition, turbulence, and unstable features. Thus, the cavitation behavior and impact-pressure distribution in WCP have always been key problems in this field. …”
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  9. 509

    Further Analysis of Non-Gaussian Wind Pressure Peak Factor Calculation by Tao Ye, Ledong Zhu, Zhongxu Tan, Lanlan Li

    Published 2021-01-01
    “…The power spectrum characteristics of fluctuating wind pressure are analysed and the relationship between turbulence characteristic frequency and optimal observation time interval is discussed.…”
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  10. 510

    Numerical Modeling of Unsteady Cavitating Flows around a Stationary Hydrofoil by Antoine Ducoin, Biao Huang, Yin Lu Young

    Published 2012-01-01
    “…The 2D calculations are performed by solving the Reynolds-averaged Navier-Stokes equation using the CFD solver CFX with the k-ω SST turbulence model. The local compressibility effect is considered using a local density correction for the turbulent eddy viscosity. …”
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  11. 511

    Crisis Monitoring in Financial Sectors Using CAMEL Partial Triadic Analysis Model by Rody Guzman-Garzon, Purificacion Galindo-Villardon, Purificacion Vicente-Galindo

    Published 2025-01-01
    “…These results are contrasted using the HJ-Biplot and the dynamic HJ-Biplot, which allow for the evaluation of banking scenarios in the context of financial turbulence. When applied to the Ecuadorian banking sector, the model identified significant fluctuations in three key periods: pre-pandemic, pandemic, and the territorial crisis between Russia and Ukraine. …”
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  12. 512

    Numerical Modelization of the Flow in Centrifugal Pump: Volute Influence in Velocity and Pressure Fields by Miguel Asuaje, Farid Bakir, Smaïne Kouidri, Frank Kenyery, Robert Rey

    Published 2005-01-01
    “…A sensitivity analysis regarding grid quality and turbulence models were also performed. The final impeller model obtained was used for a 3D quasi-unsteady flow simulation of the impeller-volute stage. …”
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  13. 513

    Ionospheric Disturbances Recorded by DEMETER Satellite over Active Volcanoes: From August 2004 to December 2010 by Jacques Zlotnicki, Feng Li, Michel Parrot

    Published 2013-01-01
    “…The two main types are electrostatic turbulence (type 1, 23.4%) and electromagnetic emissions (type 2, 69.5%). …”
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  14. 514

    Simulation of the Behavior of Non-Newtonian Fluids Dissolved in Water Inside Non-Concentric Rotating Cylinders by Abolfazl Hajizadeh Aghdam, Mohamadjavad Ebrahimi, Ahmad Beytolahi Tavakoli, AmirHossein Refahi

    Published 2024-08-01
    “…The changes in the speed of the rotating cylinder and as a result the changes in the radial speed, axial speed, and tangential speed of the fluids were investigated along the selected planes. Turbulence kinetic energy and shear stress on the cylinder walls, which are effective factors in fluid flow, were also analyzed and investigated. …”
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  15. 515

    Influences of Depth of the Falling-sill on the Flow State Conversion of Underflow Hydraulic Jump by LIU Yiheng, QIU Yong, ZHOU Xinyu, HE Yunqiu, WU Siheng

    Published 2023-01-01
    “…In restricted topographic conditions,a falling-sill can be set at the end of the discharge chute for the spillway.The length of the dissipation pool is shortened by increasing the flow velocity attenuation along the way of the jet,or increasing the sudden expansion ratio of the stilling pool at the same time.The energy is further dissipated by increasing the internal turbulence of the water body through the plane reverse flow.Based on the existing mechanism of jet diffusion,the flow state conversions of underflow energy dissipation without falling-sill,sudden expansion underflow energy dissipation and energy dissipation of rectangular stilling well are studied.The results show that:①the forced water jump submerged criterion of underflow energy dissipation without falling-sill is between 1.00~1.20,and sudden expansion underflow energy dissipation and energy dissipation of rectangular dissipation well can be distinguished by the critical submerged criterion.②When the angle of the incident water flow remains unchanged,the Froude number (Fr) increases,and the energy dissipation of rectangular stilling well is transformed into sudden expansion underflow energy dissipation under the same depth of falling-sill;when the Froude number remains unchanged,the angle of the incident water flow (θ) increases,and the depth of falling-sill needs to be increased to maintain energy dissipation of rectangular stilling well.In other words,the change in depth of falling-sill can be applied to influence the flow state conversion and effectively reduce the length of the energy dissipater in the direction of water flow.…”
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  16. 516

    Evidence of Terrain-Induced Windshear Due to Lantau Island over the Third Runway of the Hong Kong International Airport—Examples and Numerical Simulations by Pak Wai Chan, Kai Kwong Lai

    Published 2024-12-01
    “…It is found that, though 07LA is located at least 4 km from the foothills of Lantau Island, which has peaks rising to about 1 km above mean sea level, the terrain-induced airflow disturbances could, at times, extend to 7–8 km away from the mountains to bring about low-level windshear and turbulence to this runway corridor. This conclusion is drawn based on actual pilot windshear reports and observations from Doppler light detection and ranging (LIDAR) systems and confirmed by simulations using a mesoscale to microscale numerical weather-prediction model. …”
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  17. 517

    New Findings by High-Order DNS for Late Flow Transition in a Boundary Layer by Chaoqun Liu, Lin Chen, Ping Lu

    Published 2011-01-01
    “…It is believed that the small vortices, and thus turbulence, are generated by the interaction of positive spikes and other higher level vortices with the solid wall. …”
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  18. 518

    Novel analytical superposed nonlinear wave structures for the eighth-order (3+1)-dimensional Kac-Wakimoto equation using improved modified extended tanh function method by Wafaa B. Rabie, Hamdy M. Ahmed, Taher A. Nofal, E. M. Mohamed

    Published 2024-11-01
    “…Higher-order nonlinear partial differential equations, such as the eighth-order Kac-Wakimoto model, are useful for studying wave turbulence in fluids, where energy transfers across a range of wave numbers. …”
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  19. 519

    Numerical Study of Wave- and Current-Induced Oscillatory Seabed Response near a Fully Buried Subsea Pipeline by Lunliang Duan, Meiling Fan, Duoyin Wang, Caixia Meng, Lei Xing

    Published 2021-01-01
    “…In this paper, Biot’s consolidation mode is used to govern the fluid-induced seabed response, and combined Reynolds averaged Navier–Stokes (RANS) equation with the k-ε turbulence model is employed to simulate the fluid propagation. …”
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  20. 520

    Regional economic integration in the Eurasian Economic Union: theory, lessons from the past and new opportunities by L. V. Shkvarya

    Published 2023-07-01
    “…The author concludes that it is production cooperation in the real sectors of the economy in the EAEU that will ensure the necessary stability of both national economies and the progressive development of the integration process in the current conditions of the world economic process increased turbulence and the global system transformation. And since the EAEU faces such large-scale and vital tasks, then, according to the author, a reassessment and some redirection of integration efforts are required. …”
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