Gotowe bibliografie tematyczne / Approach flow velocity

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Gotowa bibliografia na temat „Approach flow velocity”

Autor: Grafiati
Data publikacji: 3 czerwca 2025
Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Approach flow velocity"

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Cao, Chen, Shengyuan Song, Jianping Chen, Lianjing Zheng, and Yuanyuan Kong. "An Approach to Predict Debris Flow Average Velocity." Water 9, no. 3 (2017): 205. http://dx.doi.org/10.3390/w9030205.

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Sherratt, Anthony, Christopher T. DeGroot, Anthony G. Straatman, and Domenico Santoro. "A numerical approach for determining the resistance of fine mesh filters." Transactions of the Canadian Society for Mechanical Engineering 43, no. 2 (2019): 221–29. http://dx.doi.org/10.1139/tcsme-2018-0071.

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Characterizing the resistance of mesh filters, in terms of pressure drop as a function of flow velocity, is an important part of modeling any filtration process. Most commonly, filters are characterized experimentally, which can be costly and time-consuming. This motivates a generalized numerical approach for characterizing the resistance of mesh filters based on the flow through a representative segment of a filter. There is uncertainty, however, in the correct specification of boundary conditions such that the numerical results for flow through the small segment match the overall behaviour o
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Lei, Gang, Nai Cao, Di Liu, and Huijie Wang. "A Non-Linear Flow Model for Porous Media Based on Conformable Derivative Approach." Energies 11, no. 11 (2018): 2986. http://dx.doi.org/10.3390/en11112986.

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Prediction of the non-linear flow in porous media is still a major scientific and engineering challenge, despite major technological advances in both theoretical and computational thermodynamics in the past two decades. Specifically, essential controls on non-linear flow in porous media are not yet definitive. The principal aim of this paper is to develop a meaningful and reasonable quantitative model that manifests the most important fundamental controls on low velocity non-linear flow. By coupling a new derivative with fractional order, referred to conformable derivative, Swartzendruber equa
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Mrokowska, M. M., P. M. Rowiński, and M. B. Kalinowska. "A methodological approach of estimating resistance to flow under unsteady flow conditions." Hydrology and Earth System Sciences 19, no. 10 (2015): 4041–53. http://dx.doi.org/10.5194/hess-19-4041-2015.

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Abstract. This paper presents an evaluation and analysis of resistance parameters: friction slope, friction velocity and Manning coefficient in unsteady flow. The methodology to enhance the evaluation of resistance by relations derived from flow equations is proposed. The main points of the methodology are (1) to choose a resistance relation with regard to a shape of a channel and (2) type of wave, (3) to choose an appropriate method to evaluate slope of water depth, and (4) to assess the uncertainty of result. In addition to a critical analysis of existing methods, new approaches are presente
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Chen, Yang, and Kevin J. Maki. "A velocity decomposition approach for three-dimensional unsteady flow." European Journal of Mechanics - B/Fluids 62 (March 2017): 94–108. http://dx.doi.org/10.1016/j.euromechflu.2016.11.011.

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Ruas, V. "On the velocity-vorticity approach to viscous incompressible flow." Archives of Computational Methods in Engineering 6, no. 3 (1999): 223–68. http://dx.doi.org/10.1007/bf02896424.

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Elgamal, Mohamed. "Mapping Mean Velocity Field over Bed Forms Using Simplified Empirical-Moment Concept Approach." Water 15, no. 19 (2023): 3351. http://dx.doi.org/10.3390/w15193351.

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The log-wake law was successful in mapping velocity fields for uniform flow over flat surfaces, even in cases of wake effects (velocity dips, wall effects, and secondary currents). However, natural riverbeds with undulations and bedforms challenge these models. This study introduces a moment-based empirical method for rough estimation of the velocity fields over stationary 2D bedforms. It proposes three polynomial velocity profile templates (first, fifth, and eighth orders) with coefficients deduced analytically while taking into account an array of flow conditions and assumptions, including s
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Mäkipere, Krista, and Piroz Zamankhan. "Simulation of Fiber Suspensions—A Multiscale Approach." Journal of Fluids Engineering 129, no. 4 (2006): 446–56. http://dx.doi.org/10.1115/1.2567952.

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The present effort is the development of a multiscale modeling, simulation methodology for investigating complex phenomena arising from flowing fiber suspensions. The present approach is capable of coupling behaviors from the Kolmogorov turbulence scale through the full-scale system in which a fiber suspension is flowing. Here the key aspect is adaptive hierarchical modeling. Numerical results are presented for which focus is on fiber floc formation and destruction by hydrodynamic forces in turbulent flows. Specific consideration was given to dynamic simulations of viscoelastic fibers in which
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Sambu, Mathan, Izzuddin Zaman, Bukhari Manshoor, et al. "Numerical Simulation of Fixed-Free End Beam’s Modal Behaviour using Two-Way Coupled Fluid-Structure Interaction Approach." Journal of Advanced Research in Applied Mechanics 125, no. 1 (2024): 148–60. http://dx.doi.org/10.37934/aram.125.1.148160.

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The fluid flow velocity stands as a pivotal parameter with a great influence on the mutual interaction between the fluid domain and structure. This paper focuses on structural deformation, structural velocity, von-Mises stress and frequency response of a fixed-free end beam using two-way coupled fluid-structure interaction within ANSYS Workbench. The parameters such as deformed fluid pressure and velocity were analysed across three diverse flow regimes: laminar, transitional and turbulent – each aligned with distinct fluid velocities. The outcomes show that the total deformation, velocity and
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Kumar, Bhuvaneshvar, and G. S. Seth. "MHD stagnation point transient flow of a nanofluid past a stretching sheet: SRM approach." Latin American Applied Research - An international journal 49, no. 3 (2019): 205–11. http://dx.doi.org/10.52292/j.laar.2019.77.

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Stagnation point nanofluid flow over a stretching sheet embedded in a porous medium is investigated in the present model by taking Navier’s velocity sip into account. The spectral relaxation method (SRM) is utilized to solve boundary layer equations. The variation of nanofluid velocity, concentration and temperature corresponding to some dominant flow parameters is displayed via graphs. The findings reveal that when stretching sheet is moving faster than free stream then porous permeability, unsteadiness, velocity slip and magnetic parameters have tendency to reduce fluid velocity but in oppos
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Rozprawy doktorskie na temat "Approach flow velocity"

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Kim, Goo. "A vorticity-velocity approach for three-dimensional unsteady viscous flow over wings." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/12123.

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Thorburn, John M. "HYDRAULIC EFFECTS OF PERPENDICULAR WATER APPROACH VELOCITY ON METER GATE FLOW MEASUREMENT." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2190.

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Accurate flow measurement is required to effectively manage water resources. California Senate Bill X7-7 (SB X7-7), legislates this need by requiring agricultural water providers serving areas greater than 25,000 acres to develop an Agricultural Water Management Plan (AWMP) and adopt pricing based at least partly on volumetric water deliveries (DWR, 2009). This study focused on two of the most common flow measurement/flow control devices used in California open channel water conveyance systems: the circular meter gate and the rectangular meter gate. Testing was conducted on three Armco-type (r
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Roveda, Roberto. "A combined discrete velocity particle based numerical approach for continuum/rarefied flows /." Full text (PDF) from UMI/Dissertation Abstracts International, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p3004370.

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Soldati, Enrico. "Development of a new approach for the assessment of complex blood flow patterns in the left atrium from 4D flow MRI imaging." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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Mitral valve regurgitation is a common disorder affecting 2-3% of the general population. The morphological and functional remodelling of the left atrium caused by this disease could favour blood stagnation and consequently stroke risk. Several clinical studies suggest that stroke risk stratification may be improved by using hemodynamic information on the left atrium. The goal of this study was therefore to develop a new approach for the assessment of complex blood flow patterns in the left atrium which could quantify the hemodynamic implications of the mitral valve regurgitation on sick patie
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De, Zan Cecilia. "Some new results on reaction-diffusion equations and geometric flows." Doctoral thesis, Università degli studi di Padova, 2012. http://hdl.handle.net/11577/3422529.

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In this thesis we discuss the asymptotic behavior of the solutions of scaled reaction-diffusion equations in the unbounded domain Rn × (0 + ∞), in the cases when such a behavior is described in terms of moving interfaces. As first class of asymptotic problems we consider the singular limit of bistable reaction-diffusion equations in the case when the velocity of the traveling wave equation depends on the space variable, i.e. cε = cε(x), and it satisfies, in some suitable sense, cε/ετ → α, as ε → 0+, where α is a discontinuous function and τ is an integer that can be equal to 0 or 1. The secon
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Núñez, Uribe Rodolfo Andrés. "Estimation of relative pressure from velocity measurements in blood flows: state-of-the-art and the approaches." Tesis, Universidad de Chile, 2016. http://repositorio.uchile.cl/handle/2250/139466.

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Magíster en Ciencias de la Ingeniería, Mención Matemáticas Aplicadas<br>Ingeniero Civil Matemático<br>El gradiente de presión a lo largo de vasos sanguíneos con estenosis es un índice clínico importante para el diagnóstico de la severidad de patologías cardiovasculares. Mientras el estándar clínico para su medida es una cateterización invasiva (medir directamente la presión introduciendo un catéter en los vasos sanguíneos), la resonancia magnética de contraste de fase ha emergido como una prometedora herramienta para permitir cuantificaciones no invasivas de la presión relativa, ligando las me
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Chang, Ze Zhou. "Etude de collisions interparticulaires en écoulement turbulent isotrope ou anisotrope par une approche lagrangienne à plusieurs trajectoires simultanées." Rouen, 1998. http://www.theses.fr/1998ROUES008.

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Une étude des interactions particule/particule est présentée suivant une simulation lagrangienne de plusieurs trajectoires simultanées et la simulation réelle des collisions entre les particules dans un écoulement turbulent donne. Un cas test en turbulence homogène isotrope, sans gravite, a ensuite été étudié et comparé à une simulation directe LES. On montre l'importance de conserver la corrélation V#PU#F globalement constante par une modification de la vitesse des particules fluides lors d'une collision. Cette modification a permis d'observer que pour un nuage distribué aléatoirement dans un
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Rigal, Claire. "Comportement de fluides complexes sous écoulement : approche expérimentale par résonance magnétique nucléaire et techniques optiques et simulations numériques." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0091/document.

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Cette thèse est une contribution à la fois expérimentale, théorique et numérique à l'étude des écoulements bidimensionnels de fluides complexes dans une conduite cylindrique présentant des singularités et dans une géométrie annulaire à cylindres excentrés. Le fluide utilisé est une solution de xanthane à différentes concentrations présentant un caractère non newtonien rhéofluidifiant. L'objectif principal de cette thèse est la caractérisation de l'influence des propriétés rhéofluidifiantes sur le comportement des zones de recirculation, en terme de morphologie, de positionnement et d'intensité
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Lassabatere, L., Jaan H. Pu, H. Bonakdari, C. Joannis, and F. Larrarte. "Velocity Distribution in Open Channel Flows: Analytical Approach for the Outer Region." 2012. http://hdl.handle.net/10454/11560.

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No<br>This paper presents an integration procedure for the Reynolds-averaged Navier-Stokes equations for the determination of the distribution of the streamwise velocity using the vertical component. This procedure is dedicated to the outer region and central part of channels. The proposed model is applicable to both rough and smooth flow regimes, provided the velocity at the inner-outer boundary has been properly defined. To generate a simplified expansion, a number of hypotheses are proposed, focusing in particular on the analytical modeling of the vertical component by adopting a neglig
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Barfett, Joseph. "Blood Velocity and Volumetric Flow Rate Calculated from Dynamic 4D CT Angiography using a Time of Flight Approach." Thesis, 2014. http://hdl.handle.net/1807/44003.

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Purpose: A time of flight approach to the analysis of 4D CT angiography is examined to calculate blood flow in arteries. Materials and Methods: Software was written to track contrast bolus TOF along a central vessel axis. Time density curves were analyzed to determine bolus time to peak at successive vessel cross-sections which were plotted against vessel path length. A line of best fit was plotted through the resulting data and 1/slope provided a measurement of velocity. Results: Validation was successful in simulation and in flow phantoms, though quality of results depended strongly on quali
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Książki na temat "Approach flow velocity"

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Johnson, D. A. A laser Doppler velocimeter approach for near-wall three-dimensional turbulence measurements. National Aeronautics and Space Administration, Ames Research Center, 1990.

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Estimation of blood velocities using ultrasound: A signal processing approach. Cambridge University Press, 1996.

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Części książek na temat "Approach flow velocity"

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Skerget, P., A. Alujevic, C. A. Brebbia, and G. Kuhn. "Natural and Forced Convection Simulation Using the Velocity-Vorticity Approach." In Viscous Flow Applications. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-83683-1_4.

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Wang, Xiaodong, Jinchao Xu, Long Zhu, Donghui Zhou, and Jun Zhao. "Study on the Unsteady Flow of the Approach Channel’s Entrance." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_59.

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AbstractThe entrance of shiplock’s approach channel always exist a mixing shear layer caused by the shear mixing layer, where is the junction of main river flow and the quiescent water of the approach channel. The flow structure of the turbulent mixing area presented as large-scale vortices frequently and periodically. And the fluctuations of the water surface and velocity induced by the separation of vortices may threat the navigation conditions, which should be considered during the engineering designing. The existing studies regard the mixing shear layer as steady flow and only take care of
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Xu, Jinchao, Xiaodong Wang, Long Zhu, Donghui Zhou, and Jun Zhao. "Study on Air Bubble Plume in Open Channel with CFD-PBM Coupling Model." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_110.

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AbstractAir bubble plume flow has been applied widely in the dredging, ice breaking, and pollution control at navigation projects. But the interaction regimes among bubbles or between bubbles and water are not quite clear. Especially in open channels, the bubble plume flow are significantly affected by the separation phenomenon which is caused by the cross flow velocity. According to the existing research, the interaction force of gas-liquid and the distribution of bubble size are the key parameters to simulate the hydrodynamic characteristics of bubble plume flow. In order to explore the mech
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Darby, R. "An Engineering Approach to Modeling Complex Flow Behaviour of Polymer Solutions." In The Influence of Polymer Additives on Velocity and Temperature Fields. Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-82632-0_26.

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Bousmar, Didier, Catherine Swartenbroekx, Geoffrey Pierard, and Emmanuel Van Hees. "Optimizing Upstream Approach Wall to Navigation Lock in Narrow Rivers." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_47.

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AbstractIn canalized rivers, navigation locks are often located aside a weir. River currents are concentrated towards the weir. As a result, vessels face transverse currents and significant outdraft forces when approaching the lock. An approach wall can be designed to isolate the final lock approach from the weir flow. This wall can be a plain wall, or a perforated wall. Depending on the design of the wall openings, the flow velocity gradient and the outdraft forces are translated upstream at the entrance of the port. At this location, the vessel keeps a larger velocity and can manoeuvre more
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Wei, Kai, Qing Li, Yi Yao, and Yeqing Sun. "Use of Temporal Convolutional Network with an Attention Mechanism and a Bidirectional Gated Recurrent Unit to Capture and Predict Slope Debris Flow Risk." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-4355-1_6.

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AbstractA novel approach for predicting slope debris flow risk is proposed to address the issue of single-factor data modeling in current slope debris flow risk prediction. The DA-TCN-BiGRU approach combines the dual attention mechanism, temporal convolutional network, and bidirectional gated recurrent unit. Based on the slope debris flow simulation platform, rainfall, soil shear wave velocity, surface displacement, soil pressure and soil moisture data are collected. The data warning features of debris flow risk are captured using the TOSIS entropy method, and the risk level of the slope debri
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Holzbecher, Ekkehard, and Ahmed Hadidi. "Sediment Transport in Shallow Waters as a Multiphysics Approach." In Natural Disaster Science and Mitigation Engineering: DPRI reports. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-2904-4_16.

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AbstractSuspended particle and bed-load transport are usually high during flooding events. For that reason, sediment transport is an important feature to be taken into account when studying floods. Measures that aim to mitigate the negative impacts of floods depend on such studies. Sediment transport phenomena are complex due to their coupling behavior with fluid flow. Due to the erosion and sedimentation of particulate matter, the ground surface changes during the passing of a flood. The courses of unregulated rivers and wadis after floods are different than those before floods. Flowing water
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Zuev, Lev B. "Autowave Mechanics of Plastic Flow." In Springer Tracts in Mechanical Engineering. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60124-9_12.

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AbstractThe notions of plastic flow localization are reviewed here. It have been shown that each type of localized plasticity pattern corresponds to a given stage of deformation hardening. In the course of plastic flow development a changeover in the types of localization patterns occurs. The types of localization patterns are limited to a total of four pattern types. A correspondence has been set up between the emergent localization pattern and the respective flow stage. It is found that the localization patterns are manifestations of the autowave nature of plastic flow localization process,
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Wang, Rongrong, Aiping Sun, Shouyuan Zhang, Hongyu Cheng, and Gensheng Zhao. "Improvement Measures of Navigable Flow Conditions in the Baihutan Hydro-Junction in Changshanjiang River, China." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_40.

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AbstractThe Baihutan hydro-junction of Changshanjiang River is located in the straight section of S-shaped channel, and the upstream approach channel is located in the concave bank of the bendy section of river. Navigable flow conditions in the entrance area of upstream and the bend connection area are complicated and disordered under the influence of circumfluence. Ships are prone to drift due to the high-speed transverse flow, which makes it difficult to meet the requirements of safe navigation. In the present study, the navigable flow conditions were evaluated by building a 1:80 hydraulic m
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Zhao, Zixiang, Zhongdi Duan, Hongxiang Xue, Yuchao Yuan, and Shiwen Liu. "Effects of Inlet Conditions on the Two-Phase Flow Water Hammer Transients in Elastic Tube." In Springer Proceedings in Physics. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1023-6_81.

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AbstractTwo-phase flow water hammer events occur in the pipelines of the nuclear power systems and lead to transient and violent pressure shock to tube structures. For the sake of operation safety, the occurrence and severity of the two-phase water hammer should be carefully assessed. This paper presents a parameter analysis of the inlet conditions on the two-phase flow water hammer transients, with considering the elastic effect of the tube walls. A numerical model is established for the vapor-liquid two-phase flow based on the two-fluid six-equation modelling approach, with incorporating cor
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Streszczenia konferencji na temat "Approach flow velocity"

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Cui, Wang, Xun Lang, Bingbing He, Yufeng Zhang, and Tingting Wan. "A Deep Learning Approach to Resolve Velocity Aliasing in Blood Flow Velocity Measurement." In 2024 China Automation Congress (CAC). IEEE, 2024. https://doi.org/10.1109/cac63892.2024.10865609.

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Silverman, David C. "Rotating Cylinder Electrode - an Approach for Predicting Velocity Sensitive Corrosion." In CORROSION 1990. NACE International, 1990. https://doi.org/10.5006/c1990-90013.

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Abstract Corrosion can be accelerated by fluid flow. An overview is presented of the relationships among mass transfer coefficient, fluid velocity, shear stress, and fluid properties for several geometries. Equations are presented that allow rotating (inner) cylinder electrode velocities to be chosen so that the mass transfer coefficients are equal to those in pipes, concentric annuli, and wall jets. The suggestion is made that equality of shear stress in two configurations may sometimes be used as one criterion to insure that the fluid affected corrosion mechanism in one configuration is dupl
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Dean, Sheldon W. "Overview of Velocity Accelerated Corrosion Testing and Predictions." In CORROSION 1990. NACE International, 1990. https://doi.org/10.5006/c1990-90012.

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Abstract Corrosion may be accelerated by the flow of the fluid adjacent to the metal surface. In some cases, this is caused by a diffusion limited reaction or by mechanical damage to the corrosion product film. When diffusion through the boundary layer is limiting, the corrosion rate is almost proportional to fluid velocity. Break-away corrosion occurs in many cases, and this is characterized by a critical velocity above which the rate of damage is excessive. Electrochemical polarization can be used to discover flow conditions that cause diffusion limitations. Methods for testing for velocity
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Chen, Yang, Kevin J. Maki, and William J. Rosemurgy. "A Velocity Decomposition Approach for Unsteady External Flow." In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-42192.

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In this work we address the development of the velocity decomposition algorithm, a numerical flow solution method that incorporates both velocity potential and Navier-Stokes-based solution procedures. The motivation for this is so that the field discretization required by the Navier-Stokes solver can be reduced to the region of the flow domain in which the flow is vortical. Specific advantages are that the computational cost is reduced, it is easier to discretize the flow domain, and difficult problems such as the simulation of ships maneuvering in a seaway are closer to being within reach. Th
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Shumilo, Leonid, and Sergii Skakun. "Climate-Analog Velocity Estimation using Optical Flow Approach." In IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2023. http://dx.doi.org/10.1109/igarss52108.2023.10282217.

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DeBarber, P., J. Segall, M. Brown, R. Pitz, T. Brown, I, and D. IIFletcher. "Ozone flow tagging - A novel approach for unseeded velocity measurement." In 26th Plasmadynamics and Lasers Conference. American Institute of Aeronautics and Astronautics, 1995. http://dx.doi.org/10.2514/6.1995-1952.

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Flores, Fabrice, Ahmed Allal, and Christelle Guerret-Piècourt. "Electrification : A New Approach To Evaluate Slip Velocity During Flow Instabilities." In 10TH ESAFORM CONFERENCE ON MATERIAL FORMING. AIP, 2007. http://dx.doi.org/10.1063/1.2729624.

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Abrolat, Jan Christoph, and Thomas Musch. "A new approach for velocity profile measurements with electromagnetic flow tomography." In 2016 IEEE SENSORS. IEEE, 2016. http://dx.doi.org/10.1109/icsens.2016.7808811.

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Kurochkin, Maxim A., Elena S. Stiukhina, Ivan V. Fedosov, and Valery V. Tuchin. "Blood flow velocity measurements in chicken embryo vascular network via PIV approach." In Saratov Fall Meeting 2017: Fifth International Symposium on Optics and Biophotonics: Optical Technologies in Biophysics & Medicine XIX, edited by Valery V. Tuchin, Dmitry E. Postnov, Elina A. Genina, and Vladimir L. Derbov. SPIE, 2018. http://dx.doi.org/10.1117/12.2315080.

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Kumar, Manoj, C. S. P. Ojha, and J. S. Saini. "Variability of Mass Transfer Coefficient with Roughness Elements and Approach Flow Velocity." In World Environmental and Water Resources Congress 2013. American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784412947.220.

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Raporty organizacyjne na temat "Approach flow velocity"

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Eckert, Richard. PR-186-184509-R01 Guideline for Erosional Velocity. Pipeline Research Council International, Inc. (PRCI), 2020. http://dx.doi.org/10.55274/r0011655.

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A guideline to determine erosional velocity limits for liquid hydrocarbon transmission pipelines was developed based on a multi-analytical probabilistic approach that integrated results from two erosional models: DNV GL RP-O501 and University of Tulsa SPPS v5.3. The guideline uses a simple classification tree model as first approach to provide conservative erosional velocities with a minimum amount of input data. The guideline also presents an alternative probabilistic approach for determining erosional velocities when the classification tree cannot be used, e.g., when there is too much data u
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Hawley, Owston, and Thorson. PR-015-13610-R01 Effect of Upstream Piping Configuration on Ultrasonic Meter Bias - Flow Validation. Pipeline Research Council International, Inc. (PRCI), 2014. http://dx.doi.org/10.55274/r0010033.

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This research demonstrated the ability of a Computational Fluid Dynamics (CFD) modeling approach to predict the severity of velocity profile disturbances in two different header configurations with AGA-9 default meter runs. The CFD model was also used to predict the flow measurement error based on the ultrasonic path geometry from four commercially-available ultrasonic flow meters. In addition to the CFD modeling, this project experimentally tested the same two header configurations in a natural gas flow loop. The results from the experimental testing were used to validate the CFD model.
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Bhushan, Shanti, Greg Burgreen, Wesley Brewer, and Ian Dettwiller. Assessment of neural network augmented Reynolds averaged Navier Stokes turbulence model in extrapolation modes. Engineer Research and Development Center (U.S.), 2025. https://doi.org/10.21079/11681/49702.

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A machine-learned model enhances the accuracy of turbulence transport equations of RANS solver and applied for periodic hill test case. The accuracy is investigated in extrapolation modes. A parametric study is also performed to understand the effect of network hyperparameters on training and model accuracy and to quantify the uncertainty in model accuracy due to the non-deterministic nature of the neural network training. For any network, less than optimal mini-batch size results in overfitting, and larger than optimal reduces accuracy. Data clustering is an efficient approach to prevent the
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Grimley. PR-015-08606-R01 Assessment of Dirty Meter Performance. Pipeline Research Council International, Inc. (PRCI), 2009. http://dx.doi.org/10.55274/r0010977.

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Like most metering technologies, ultrasonic meters are known to be affected by the buildup of material inside the meter and surrounding pipe due to common pipeline contaminants. The buildup affects the metering accuracy by reducing the flow area sampled by the ultrasonic transducers and by changing the shape of the velocity profile through the creation of additional roughness elements on the pipe wall. The goal of this project was to relate the contamination level to the measurement error. The approach was to evaluate the flow measurement performance of two commercially-available ultrasonic fl
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Zielinski, Daniel, James Kerr, Kim Bærum, Olivia Simmons, Ana Silva, and R. Goodwin. Advancements in riverine fish movement modeling : bridging environmental complexity and fish behavior. Engineer Research and Development Center (U.S.), 2024. http://dx.doi.org/10.21079/11681/49423.

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Understanding fish movement and response in relation to their environment near infrastructure and migratory barriers is crucial for developing sustainable fisheries management solutions. Intermediate-scale movement models are a contemporary approach for understanding and predicting movement patterns of riverine fish considering their changing environment, which is predominately water flow. These models can be complex and require interdisciplinary knowledge. For more than 60 years, different approaches have been developed for investigating, reproducing, and predicting the movement outcomes of f
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Hawley and George. PR-015-10603-R01 Effect of Upstream Piping Configuration on Ultrasonic Meter Bias. Pipeline Research Council International, Inc. (PRCI), 2011. http://dx.doi.org/10.55274/r0010767.

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The goals of this project were twofold: (1) to test various piping configurations that are typically installed upstream of the AGA-9 recommended default meter run to determine if the configurations can cause significant installation bias, and (2) to determine if any of the tested configurations cause sufficiently little bias to become acceptable design practice. The approach was to use three commercially-available ultrasonic flow meters to monitor changes in flow measurement accuracy and variations in the velocity profiles from common piping configurations typically installed upstream of the A
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Zanker. PR-343-10604-R01 Auto-Adjust and Auto-Checking Capabilities of Dual Rotor Turbine Meters. Pipeline Research Council International, Inc. (PRCI), 2011. http://dx.doi.org/10.55274/r0010746.

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The goals of this project were twofold: (1) to test various piping configurations that are typically installed upstream of the AGA-9 recommended default meter run to determine if the configurations can cause significant installation bias, and (2) to determine if any of the tested configurations cause sufficiently little bias to become acceptable design practice. The approach was to use three commercially-available ultrasonic flow meters to monitor changes in flow measurement accuracy and variations in the velocity profiles from common piping configurations typically installed upstream of the A
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Robbins, Bryant, and Maureen Corcoran. Calculation of levee-breach widening rates. Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/44163.

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Inundation modeling is often conducted for levee systems to understand current flood risks. The extent of inundation caused by a breach in the levee is highly influenced by the widening rate of the levee breach. This study presents an approach for calculating levee-breach widening rates based on average flow velocity through the breach, embankment height, and erosion characteristics of the soil. Estimates of soil erodibility are derived through an analysis of the measurements of soil erodibility presented in the National Cooperative Highway Research Program (NCHRP) Report 915 database. Levee-b
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Li, Xiao, GX Xu, FY Ling, et al. The dose-effect association between electroacupuncture sessions and its effect on chronic migraine: a protocol of a meta-regression of randomized controlled trials. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, 2022. http://dx.doi.org/10.37766/inplasy2022.12.0085.

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Review question / Objective: We will use a meta-regression approach to verify the dose-effect relationship between the number of electroacupuncture sessions and its effects on migraine. Condition being studied: Migraine is recurrent and chronic, requiring long-term control, but the side effects caused by long-term use limit the use of pharmacotherapy, like non-steroidal anti-inflammatory drugs (NSAIDS), ergoamines and opioids. With fewer side effects and lower cost, acupuncture is becoming a more attractive option for migraine. Relevant studies have confirmed the clinical effects of electroacu
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Grimley, Hart, and Viana. PR-015-07604-R01 Clamp-On Ultrasonic Flow Meters as Diagnostic Tools. Pipeline Research Council International, Inc. (PRCI), 2008. http://dx.doi.org/10.55274/r0011006.

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Over the past several years, improvements in clamp-on ultrasonic meter technology have caused increased interest in applying this technology within the natural gas industry. Clamp-on ultrasonic meters (CUSMs), which are mounted on the outside of a pipe, send and receive ultrasonic waveforms through the pipe wall. This configuration offers several potential advantages over in-line meters, including portability and the ability to be installed without shutdown and disassembly of the pipeline. CUSMs, like their in-line counterparts, use sophisticated electronics to control the meter operation and
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