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Journal articles on the topic 'Hydraulic fluid flows'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Myslyuk, М. А. "Modeling turbulent flows in round pipes." SOCAR Proceedings, no. 3 (September 30, 2024): 92–97. https://doi.org/10.5510/ogp20240300997.

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A rheological model of a biviscous fluid is proposed, describing laminar and turbulent flows of Newtonian and non-Newtonian fluids in round cylindrical pipes. For low shear rates, common rheological models (Newton, Bingham, Ostwald, Herschel – Bulkley, Shulman – Casson, etc.) are used, and for high rates, a generalization of the L. Prandtl model is used. Taking into account the averaged flow characteristics, a model of turbulent flow and velocity distribution equations in round pipes are constructed. The model ensures the continuity of the dependence of hydraulic resistance on the fluid flow r

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2

Ilyasov, A. M., V. N. Kireev, S. F. Urmancheev, and I. Sh Akhatov. "Mathematical modeling of steady stratified flows." Proceedings of the Mavlyutov Institute of Mechanics 3 (2003): 195–207. http://dx.doi.org/10.21662/uim2003.1.014.

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The work is devoted to the analysis of the flow of immiscible liquid in a flat channel and the creation of calculation schemes for determining the flow parameters. A critical analysis of the well-known Two Fluids Model was carried out and a new scheme for the determination of wall and interfacial friction, called the hydraulic approximation in the theory of stratified flows, was proposed. Verification of the proposed approximate model was carried out on the basis of a direct numerical solution of the Navier–Stokes equations for each fluid by a finite-difference method with phase-boundary track

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3

E., Biletsky, and Petrenko O. "ASPECTS OF DETERMINATION OF HYDRAULIC RESISTANCE OF POWER FLUIDS." PROGRESSIVE TECHNIQUE AND TECHNOLOGIES OF FOOD PRODUCTION ENTERPRISES, CATERING BUSINESS AND TRADE 2(30) (December 25, 2019): 143–55. https://doi.org/10.5281/zenodo.3592845.

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<em>Flows of power fluids, the construction of expressions for determining local resistance in the stepped channel or tube and in rotation </em><em>on the </em><em>base of similar values of hydraulic resistance under the flow of Newtonian fluid are considered in the research paper. The basis of the modelling is the use of the principle of Newtonian fluids hydraulic analogy.</em> <em>The values of local resistances for constrictions and extensions under Newtonian fluid flow are well known, therefore, the authors sought to identify the main trends in the dependence of the local resistance coeffi

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4

Cummins, Brian M., Rukesh Chinthapatla, Balaji Lenin, Frances S. Ligler, and Glenn M. Walker. "Modular pumps as programmable hydraulic batteries for microfluidic devices." TECHNOLOGY 05, no. 01 (2017): 21–30. http://dx.doi.org/10.1142/s2339547817200011.

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Simple fluid pumps have been developed to improve microfluidic device portability, but they cannot be easily programmed, produce repeatable pumping performance, or generate complex flow profiles — key requirements for increasing the functionality of portable microdevices. We present a detachable, paper-based, “hydraulic battery” that can be connected to the outlet of a microfluidic channel to pump fluid at varying flow rates over time, including step changes, ramping flows, and oscillating flows.

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5

THORPE, S. A., and I. KAVCIC. "The circular internal hydraulic jump." Journal of Fluid Mechanics 610 (August 8, 2008): 99–129. http://dx.doi.org/10.1017/s0022112008002553.

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Circular hydraulic jumps are familiar in single layers. Here we report the discovery of similar jumps in two-layer flows. A thin jet of fluid impinging vertically onto a rigid horizontal plane surface submerged in a deep layer of less-dense miscible fluid spreads radially, and a near-circular internal jump forms within a few centimetres from the point of impact with the plane surface. A jump is similarly formed as a jet of relatively less-dense fluid rises to the surface of a deep layer of fluid, but it appears less stable or permanent in form. Several experiments are made to examine the case

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6

GARRETT, CHRIS, and FRANK GERDES. "Hydraulic control of homogeneous shear flows." Journal of Fluid Mechanics 475 (January 25, 2003): 163–72. http://dx.doi.org/10.1017/s0022112002002884.

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If a shear flow of a homogeneous fluid preserves the shape of its velocity profile, a standard formula for the condition for hydraulic control suggests that this is achieved when the depth-averaged flow speed is less than (gh)1/2. On the other hand, shallow-water waves have a speed relative to the mean flow of more than (gh)1/2, suggesting that information could propagate upstream. This apparent paradox is resolved by showing that the internal stress required to maintain a constant velocity profile depends on flow derivatives along the channel, thus altering the wave speed without introducing

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7

KLUWICK, ALFRED, STEFAN SCHEICHL, and EDWARD A. COX. "Near-critical hydraulic flows in two-layer fluids." Journal of Fluid Mechanics 575 (March 2007): 187–219. http://dx.doi.org/10.1017/s0022112006004071.

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This paper deals with the propagation of nearly resonant gravity waves in two-layer flows over a bottom topography assuming that both fluids are incompressible and inviscid. Evolution equations are derived for weakly nonlinear surface-layer and internal-layer waves in the hydraulic limit of infinite wavelength. Special emphasis is placed on the flow regime where the quadratic nonlinear parameter associated with internal-layer waves is small or vanishes. For example, this is the case for all possible density ratios if the velocities in both layers are equal and if the interface height is close

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8

Cherniuk, Volodymyr, Oleksandr Kravchuk, Vadym Fasuliak, and Matvii Cherniuk. "Improvement of Modeling of Laminar Flows in Pressure Collector-Pipelines." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 120, no. 2 (2024): 182–96. http://dx.doi.org/10.37934/arfmts.120.2.182196.

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In the now-a-day’s methods of hydraulic calculation of pressure collector-pipelines, the value of the coefficient of hydraulic friction (Darci coefficient) is assumed to be constant. However, the fluid flow rate along the collector pipeline is variable. It increases along the pipeline at the expense of fluid inflow from jets through inlets in its wall. In the initial segments of long CP the fluid flow is laminar. Farther, with the increase of fluid flow rate, a turbulent stream is formed. In this paper, laminar streams are considered. The variability of Darci coefficient is taken into account.

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9

Volgin, George. "The hydraulic resistance coefficient in the conditions of simultaneous effect of Re, Fr and Unknown node mfrac found in MathML fragment.$ {B \over h} $." E3S Web of Conferences 97 (2019): 05031. http://dx.doi.org/10.1051/e3sconf/20199705031.

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One of the most important tasks of engineering hydraulics is to determine the energy loss during the motion of the fluid flow. The study of the question of whether the patterns of hydraulic resistances are similar in a calm and turbulent flow is relevant in the design of hydraulic structures. In most cases, a turbulent regime of fluid motion is observed in various applications, but to date, the theory of turbulence is not considered complete. When designing hydraulic structures, inaccuracies in the existing calculation methods can lead to a decrease in the efficiency and reliability of the ent

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10

Li, Bin, and Ze-Min Xu. "Experimental Investigation into the Number of Phases in Debris Flows." Applied Sciences 15, no. 8 (2025): 4282. https://doi.org/10.3390/app15084282.

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Controversial number of phases in debris-flow masses involves almost all areas of debris-flow research. In this study, we experimentally investigated the number of phases in fully developed debris flows using six sediments with three maximum diameters of up to 30 mm from two representative debris-flow deposits in China. Fluid escape tests, displacement experiments, relative motion experiments, and rheometrical tests were conducted using 12 slurries prepared with the sediments. The results from four types of experiments show that debris flows are close to one-phase flow and far from two-phase f

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11

Iskenderov, E. Kh, F. B. Ismayılova, G. A. Zeynalova, and M. F. Shukurlu. "Diagnostics of velocity-flow characteristics in laminar flows." Azerbaijan Oil Industry, no. 06-07 (June 15, 2024): 32–37. http://dx.doi.org/10.37474/0365-8554/2024-06-07-32-37.

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Understanding and evaluating various types of fluid movement is important for the analysis and design of systems and devices related to hydraulics and hydrodynamics, including hydrocarbon production and transport systems. Knowledge of stationary and non-stationary types of motion makes it possible to predict and control the behavior of a fluid under various conditions. The article discussed the issues of diagnosing stationary and non-stationary and gravitational flows. It has been established that the time of transition to a stationary mode in pipelines mainly depends on the geometric paramete

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12

Jeong, Jong-Hyun, Jong-Ki Kim, and Yong Kweon Suh. "Numerical Study on Hydraulic Fluid Flows Within Axial Piston Pumps." Transactions of the Korean Society of Mechanical Engineers B 34, no. 2 (2010): 129–36. http://dx.doi.org/10.3795/ksme-b.2010.34.2.129.

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13

ZHU, DAVID Z., and GREGORY A. LAWRENCE. "Non-hydrostatic effects in layered shallow water flows." Journal of Fluid Mechanics 355 (January 25, 1998): 1–16. http://dx.doi.org/10.1017/s0022112097007611.

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This paper develops a one-dimensional extension to classical layered hydraulics that incorporates non-hydrostatic effects. General results for a homogeneous layer in a multi-layer steady flow are applied to single- and two-layer flow over a two-dimensional sill. The equation obtained for single-layer flows is the same as that obtained by Naghdi & Vongsarnpigoon (1986) using the direct theory of constrained fluid sheets, and compares very well with the laboratory measurements of Sivakumaran et al. (1983). The new equation derived for two-layer flows provides excellent agreement with the lab

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14

Demeke, Getnet Kebede, Dereje Hailu Asfaw, and Yilma Seleshi Shiferaw. "3D Hydrodynamic Modelling Enhances the Design of Tendaho Dam Spillway, Ethiopia." Water 11, no. 1 (2019): 82. http://dx.doi.org/10.3390/w11010082.

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Hydraulic structures are often complex and in many cases their designs require attention so that the flow behavior around hydraulic structures and their influence on the environment can be predicted accurately. Currently, more efficient computational fluid dynamics (CFD) codes can solve the Navier–Stokes equations in three-dimensions and free surface computation in a significantly improved manner. CFD has evolved into a powerful tool in simulating fluid flows. In addition, CFD with its advantages of lower cost and greater flexibility can reasonably predict the mean characteristics of flows suc

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15

Ferrari, A. "Fluid dynamics of acoustic and hydrodynamic cavitation in hydraulic power systems." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 473, no. 2199 (2017): 20160345. http://dx.doi.org/10.1098/rspa.2016.0345.

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Cavitation is the transition from a liquid to a vapour phase, due to a drop in pressure to the level of the vapour tension of the fluid. Two kinds of cavitation have been reviewed here: acoustic cavitation and hydrodynamic cavitation. As acoustic cavitation in engineering systems is related to the propagation of waves through a region subjected to liquid vaporization, the available expressions of the sound speed are discussed. One of the main effects of hydrodynamic cavitation in the nozzles and orifices of hydraulic power systems is a reduction in flow permeability. Different discharge coeffi

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16

Sakhapova, T. S., A. S. Karavaev, O. V. Sidorov, and V. A. Tikhonov. "Selection of a hydraulic circuit for optimal stemming truck operation." Mining Industry Journal (Gornay Promishlennost), no. 1/2022 (March 15, 2022): 59–64. http://dx.doi.org/10.30686/1609-9192-2022-1-59-64.

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Blasthole stemming has a major impact on blasting operations. Depending on the stemming material, different types of equipment are used, one of which is described in this article. The article presents the ZM-7-G stemming truck manufactured by AZOTTEKH LLC, which is designed for mechanized stemming with loose material. The stemming truck complements a range of machines for mechanization blasting operations and improves the blasting efficiency, reducing the flyrock zone and enhancing the environmental situation in the quarry areas. An optimal hydraulic circuit is selected based on this model and

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17

Boodoo, Curtis. "Micropolar Fluid Flows Past a Porous Shell: A Model for Drug Delivery Using Porous Microspheres." European Journal of Engineering and Technology Research 9, no. 3 (2024): 1–7. http://dx.doi.org/10.24018/ejeng.2024.9.3.3162.

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The creeping flow of an incompressible, bounded micropolar fluid past a porous shell is investigated. The porous shell is modeled using a Darcy equation, sandwiched between a pair of transition Brinkman regions. Analytical expressions for the stream function, pressure, and microrotations are given for each region. Streamline patterns are presented for variations in hydraulic resistivity, micropolar constants, porous layer thickness, and Ochoa-Tapia stress jump coefficient. An expression for the dimensionless drag for the unbounded case of the system is presented, and its variation with hydraul

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18

Miserocchi, G., D. Venturoli, D. Negrini, M. C. Gilardi, and R. Bellina. "Intrapleural fluid movements described by a porous flow model." Journal of Applied Physiology 73, no. 6 (1992): 2511–16. http://dx.doi.org/10.1152/jappl.1992.73.6.2511.

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We injected technetium-labeled albumin (at a concentration similar to that of the pleural fluid) in the costal region of anesthetized dogs (n = 13) either breathing spontaneously or apneic. The decay rate of labeled activity at the injection site was studied with a gamma camera placed either in the anteroposterior (AP) or laterolateral (LL) projection. In breathing animals (respiratory frequency approximately 10 cycles/min), 10 min after the injection the activity decreased by approximately 50% on AP and approximately 20% on LL imaging; in apneic animals the corresponding decrease in activity

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19

Lwisa, Essa Georges. "Propellant Stimulation and Hydraulic Fracturing." International Journal for Innovation Education and Research 9, no. 6 (2021): 80–96. http://dx.doi.org/10.31686/ijier.vol9.iss6.3149.

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The Propellant Stimulation is applied to increase the permeability of rocks; a certain quantity of explosive material is donated at the bottom of the well opposite the producing layer, which causes many cracks in the near well area. A good Propellant Stimulation process must consider the explosive material quality and quantity, and the explosion should be prevented from vertically spread so all its energy will be used to crack the rocks. The first part of this chapter explains all the above in addition to the directed explosions and its calculation in an easy way. In the second part, I explain

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20

Yetilmezsoy, Kaan. "Superiority of the computer-based approach in solving iterative open channel hydraulic problems." Fluid Mechanics research International Journal 5, no. 1 (2024): 29–38. http://dx.doi.org/10.15406/fmrij.2024.05.00062.

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The study of engineering lays more of a focus on mathematics and analytical thinking than other academic subjects. One of the outputs required for the accreditation of programs providing this education is to train engineers who have the ability to define, formulate/solve complex engineering problems, design under realistic constraints and conditions, and select/apply appropriate analysis/modeling methods for this purpose. In particular, fluid mechanics (a discipline that focuses on the study of fluids (liquids and gases) and the forces acting on them) and hydraulics (a subfield of hydrodynamic

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21

Ault, Jesse T., Sangwoo Shin, and Howard A. Stone. "Diffusiophoresis in narrow channel flows." Journal of Fluid Mechanics 854 (September 10, 2018): 420–48. http://dx.doi.org/10.1017/jfm.2018.618.

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Flows containing suspended colloidal particles and dissolved solutes are found in a multitude of natural and man-made systems including hydraulic fractures, water filtration systems and microfluidic devices, e.g. those designed for biological or medical applications. In these types of systems, unexpected particle dynamics such as rapid particle transport and focusing has been observed in the presence of local solute gradients due to the cooperating or competing effects of fluid advection and particle diffusiophoresis, the latter driven by local chemical gradients. We develop analytical express

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22

Kayukov, D. Yu. "Testing of tracer monitoring systems of horizontal wells on a multiphase metrological test bench." Actual Problems of Oil and Gas, no. 41 (September 14, 2023): 173–83. http://dx.doi.org/10.29222/ipng.2078-5712.2023-41.art11.

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In 2021–2022, for the first time in Russia and world practice, work was carried out on bench testing of technologies for tracing fluid flows in horizontal wells by simulating a hydraulic fracturing port to assess the metrological accuracy of the technology.

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23

Jeon, Min-Kyung, Amin Hosseini Zadeh, Seunghee Kim, and Tae-Hyuk Kwon. "Fluid-driven mechanical responses of deformable porous media during two-phase flows: Hele-Shaw experiments and hydro-mechanically coupled pore network modeling." E3S Web of Conferences 205 (2020): 08009. http://dx.doi.org/10.1051/e3sconf/202020508009.

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Injecting fluid into a porous material can cause deformation of the pore structure. This hydro-mechanically coupled (i.e., poromechanical) phenomenon plays an essential role in many geological and biological operations across a wide range of scales, from geologic carbon storage, enhanced oil recovery and hydraulic fracturing to the transport of fluids through living cells and tissues, and to fuel cells. In this study, we conducted an experimental and numerical investigation of the hydro-mechanical coupling during fluid flows in porous media at the fundamental pore-scale. First, experimental de

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Kim, Juhyun, Youngjin Seo, Jihoon Wang, and Youngsoo Lee. "History Matching and Forecast of Shale Gas Production Considering Hydraulic Fracture Closure." Energies 12, no. 9 (2019): 1634. http://dx.doi.org/10.3390/en12091634.

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Most shale gas reservoirs have extremely low permeability. Predicting their fluid transport characteristics is extremely difficult due to complex flow mechanisms between hydraulic fractures and the adjacent rock matrix. Recently, studies adopting the dynamic modeling approach have been proposed to investigate the shape of the flow regime between induced and natural fractures. In this study, a production history matching was performed on a shale gas reservoir in Canada’s Horn River basin. Hypocenters and densities of the microseismic signals were used to identify the hydraulic fracture distribu

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25

Zheng, Zhong, and Howard A. Stone. "The Influence of Boundaries on Gravity Currents and Thin Films: Drainage, Confinement, Convergence, and Deformation Effects." Annual Review of Fluid Mechanics 54, no. 1 (2022): 27–56. http://dx.doi.org/10.1146/annurev-fluid-030121-025957.

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Thin film flows, whether driven by gravity, surface tension, or the relaxation of elastic boundaries, occur in many natural and industrial processes. Applications span problems of oil and gas transport in channels to hydraulic fracture, subsurface propagation of pollutants, storage of supercritical CO2 in porous formations, and flow in elastic Hele–Shaw configurations and their relatives. We review the influence of boundaries on the dynamics of thin film flows, with a focus on gravity currents, including the effects of drainage into the substrate, and the role of the boundaries to confine the

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26

Orel, Vadym, Oksana Matsiyevska, Ihor Popadyuk, and Roman Lopushansky. "Experimental test-bed for studying submerged fluid outflow from pressure distributive pipe-line laid in an unpressured fluid flow." Problems of Water supply, Sewerage and Hydraulic, no. 43 (June 17, 2023): 45–52. http://dx.doi.org/10.32347/2524-0021.2023.43.45-52.

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To develop an experimental stand for the study of the flooded outflow of liquid from pressure distribution pipelines laid in non-pressure flow, a review of ways to reduce the uneven distribution of liquid from pressure distribution pipelines was carried out. Among them, constructively changing the geometric parameters of the distribution pipelines or exhaust devices, giving the axis of the distribution pipeline an inclination to the horizon or the axis of the exhaust devices tilting relative to the axis of the distribution pipeline, changing the angle of the liquid entering the exhaust devices

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27

Khabibullin, Il’dus L., and Artur A. Khisamov. "Modeling of unsteady filtration in a formation - hydraulic fracture system." Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mekhanika, no. 77 (2022): 158–68. http://dx.doi.org/10.17223/19988621/77/12.

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This paper presents the results of modeling of unsteady fluid filtration in the formation penetrated by a well, which intersects a vertical hydraulic fracture throughout the entire thickness of the formation. The model of a bilinear fluid flow in a formation vertical hydraulic fracture system is considered in the case when the horizontal extent of the formation is considered to be infinite, and the fracture is of a finite length. The bilinearity of the flow means that in the formation - fracture system there are two mutually perpendicular fluid flows: from the formation to the fracture and alo

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28

Tenenev, V. A., T. Raeder, and A. A. Chernova. "Incorporation of Fluid Compressibility into the Calculation of the Stationary Mode of Operation of a Hydraulic Device at High Fluid Pressures." Nelineinaya Dinamika 17, no. 2 (2021): 195–209. http://dx.doi.org/10.20537/nd210205.

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This paper is concerned with assessing the correctness of applying various mathematical models for the calculation of the hydroshock phenomena in technical devices for modes close to critical parameters of the fluid. We study the applicability limits of the equation of state for an incompressible fluid (the assumption of constancy of the medium density) to the simulation of processes of the safety valve operation for high values of pressures in the valve. We present a scheme for adapting the numerical method of S. K. Godunov for calculation of flows of incompressible fluids. A generalization o

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29

Tkachuk, Oleksandr. "To the development of hydraulic regulations of turbulent flows in pipelines." Problems of Water supply, Sewerage and Hydraulic, no. 49 (March 30, 2025): 74–84. https://doi.org/10.32347/2524-0021.2025.49.74-84.

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The suitability of the previously obtained analytical dependence for determining the coefficients of hydraulic friction of pipelines with different types and values of roughness is confirmed. It is established that in a wide range of turbulent regimes in pipelines, the coefficients of hydraulic friction depend on two determining parameters: the hydraulic thickness of the boundary layer and the coefficient of proportionality of turbulent pulsations to averaged velocities. At the same time, the change in the value of the hydraulic thickness of the boundary layer from the influencing factors has

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Kurbanova, Firuza, Kakhramon Aliboev, and Samariddin Mazhidov. "Study on issues of hydrodynamics of the roll squeezing process." E3S Web of Conferences 434 (2023): 02016. http://dx.doi.org/10.1051/e3sconf/202343402016.

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The laws of distribution of hydrodynamic pressure and changes in extracted fluid in the pressing area are developed; they take into account the phenomena of contact interaction in the roll pair of the pressing machine. Hydraulic pressure in the compression zone increases from zero at the initial point of contact to a maximum value at a point lying on the line of centers. The distribution of hydraulic pressure in the recovery zone depends on the position of the water division point. It was revealed that the pattern of change of the removed fluid in the recovery zone depends on the position of t

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Belward, Shaun R. "Fully nonlinear flow over successive obstacles: hydraulic fall and supercritical flows." Journal of the Australian Mathematical Society. Series B. Applied Mathematics 40, no. 4 (1999): 447–58. http://dx.doi.org/10.1017/s0334270000010535.

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AbstractIn this paper we consider the flow of an incompressible, inviscid and homogeneous fluid over two obstacles in succession. The flow is assumed irrotational and solutions are sought in which a hydraulic fall occurs over the first obstacle with supercritical flow over the second. The method used to solve the problem is capable of calculating flows over topography of any shape.

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Warsianto, Ardi, A. Sofwan F. Alqap, Zuliantoni, and Martin Hardiyanto. "SISTEM HIDROLIK LOADING UNLOADING MEJA PELUNCUR." Rekayasa Mekanika 8, no. 2 (2024): 69–76. https://doi.org/10.33369/rekayasamekanika.v8i2.38317.

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Mortars have been developed in the field of weapons. One of the developments is the installation of a mortar on the rear of the vehicle platform which is equipped with a navigation system and combined with a computerized fire control system. To support this, a hydraulic system is needed. A hydraulic system is a form of changing or transferring power by using a conducting medium in the form of a liquid fluid to obtain greater power than the initial power released. The purpose of this practical work report is to find out how the hydraulic system works and find out the components used in the hydr

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Xiao, Qiong. "Simulating the Hydraulic Heave Phenomenon with Multiphase Fluid Flows Using CFD-DEM." Water 12, no. 4 (2020): 1077. http://dx.doi.org/10.3390/w12041077.

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In geotechnical engineering, the seepage phenomena, especially regarding the hydraulic heave, is one of the most dangerous failure mechanisms related to infrastructural stability. Hence, a fundamental understanding of this occurrence is important for the design and construction of water-retaining structures. In this study, a computational fluid dynamics (CFD) solver was developed and coupled with discrete element method (DEM) software to simulate the seepage failure process for the three phases of soil, water, and air. Specimens were constructed with two layers of gap-graded particles to give

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Shubham, Anubrata Saikia, Amaresh Dalal, and Sukumar Pati. "Thermo-hydraulic transport characteristics of non-Newtonian fluid flows through corrugated channels." International Journal of Thermal Sciences 129 (July 2018): 201–8. http://dx.doi.org/10.1016/j.ijthermalsci.2018.02.005.

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Wei, Lihong, and Jaime Honra. "Impact of Rock Cuttings on Downhole Fluid Movement in Polycrystalline Diamond Compact (PDC) Bits, Computational Fluid Dynamics, Simulation, and Optimization of Hydraulic Structures." Fluids 10, no. 1 (2025): 13. https://doi.org/10.3390/fluids10010013.

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The flow occurring at the bottom of a polycrystalline diamond compact (PDC) drill bit involves a complex process made up of drilling fluid and the drilled rock cuttings. A thorough understanding of the bottom-hole flow conditions is essential for accurately evaluating and optimizing the hydraulic structure design of the PDC drill bit. Based on a comprehensive understanding of the hydraulic structure and fluid flow characteristics of PDC drill bits, this study integrates computational fluid dynamics (CFD) with rock-breaking simulation methods to refine and enhance the numerical simulation appro

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Esin Koksal, Suheyla, Gokhan Gunduz, and Menderes Kalkat. "Installation of Test Setup and Measurement Procedures in Fir Wood Hydraulic Conductance Measurement." Drvna industrija 72, no. 2 (2021): 111–19. http://dx.doi.org/10.5552/drvind.2021.1945.

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For a hydraulic conductor, through which liquid flows, hydraulic conductance (K, ml·s-1·MPa-1) is defined as the ratio of pressure difference at the inlet and outlet to the fluid amount passing through the hydraulic conductor in a unit time period. This property is one of the key functions of the wood, and is obtained by the flow rate (F – Flow, ml·s-1) along the wood sample divided by the pressure difference driving the flow (DP, MPa). This study aimed to establish a test setup to determine the hydraulic conductance values of Uludağ Fir (Abies bornmulleriana Mattf.). A test setup was establis

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Chanel, Paul G., and John C. Doering. "Assessment of spillway modeling using computational fluid dynamics." Canadian Journal of Civil Engineering 35, no. 12 (2008): 1481–85. http://dx.doi.org/10.1139/l08-094.

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Throughout the design and planning period for future hydroelectric generating stations, hydraulic engineers are increasingly integrating computational fluid dynamics (CFD) into the process. As a result, hydraulic engineers are interested in the reliability of CFD software to provide accurate flow data for a wide range of structures, including a variety of different spillways. In the literature, CFD results have generally been in agreement with physical model experimental data. Despite past success, there has not been a comprehensive assessment that looks at the ability of CFD to model a range

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Berman, V., E. Bournaski, V. Fadeichev, I. Skorokhod, and L. Orlova. "Numerical simulation of the unsteady fluid motion in pipelines in the pump unit start-up mode." Hydrodynamics and Acoustics 3(93), no. 1 (2024): 5–15. https://doi.org/10.15407/jha2024.01.005.

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From the experience of operating pipeline transport systems of various incompressible and compressible viscous flows, it is known that transportation conditions are constantly changing during their operation. In turn, this causes sharp fluctuations in the characteristics of such flows, which can be dangerous to pipeline equipment and personnel. In this regard, starting from the design stage, it is necessary to have convenient methods for calculating transient (unsteady) modes of flow movement, which allow determining possible pressure and flow fluctuations in different modes of operation of tr

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Marusic, Ivan, and Susan Broomhall. "Leonardo da Vinci and Fluid Mechanics." Annual Review of Fluid Mechanics 53, no. 1 (2021): 1–25. http://dx.doi.org/10.1146/annurev-fluid-022620-122816.

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This review focuses on Leonardo da Vinci's work and thought related to fluid mechanics as it is presented in a lifetime of notebooks, letters, and artwork. It shows how Leonardo's remaining works offer a complicated picture of unfinished, scattered, and frequently revisited hypotheses and conclusions. It argues that experimentation formed an important mechanism for Leonardo's thought about natural fluid flows, which was an innovation to the scientific thinking of his day, but which did not always lead him to the conclusions of modern fluid mechanics. It highlights the multiple and ambiguous me

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Chung, D., L. Chan, M. MacDonald, N. Hutchins, and A. Ooi. "A fast direct numerical simulation method for characterising hydraulic roughness." Journal of Fluid Mechanics 773 (May 26, 2015): 418–31. http://dx.doi.org/10.1017/jfm.2015.230.

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We describe a fast direct numerical simulation (DNS) method that promises to directly characterise the hydraulic roughness of any given rough surface, from the hydraulically smooth to the fully rough regime. The method circumvents the unfavourable computational cost associated with simulating high-Reynolds-number flows by employing minimal-span channels (Jiménez & Moin, J. Fluid Mech., vol. 225, 1991, pp. 213–240). Proof-of-concept simulations demonstrate that flows in minimal-span channels are sufficient for capturing the downward velocity shift, that is, the Hama roughness function, pred

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Avrunin, Grygoriy, Mikhail Podrigalo, Оlexander Zakapko, et al. "ANALYSIS OF DYNAMICS OF VOLUME HYDRAULIC POWER STEERING SELF-PROPELLED TRACTOR CHASSIS." Bulletin of the National Technical University "KhPI". Series: Hydraulic machines and hydraulic units, no. 1 (October 10, 2023): 35–42. http://dx.doi.org/10.20998/2411-3441.2023.1.06.

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Goal. Analysis of the dynamics of the hydraulic fluid power steering drive of the wheeled tractor self-propelled chassis СШ2540 by simulating the operation of a hydraulic cylinder with a one-sided rod for moving the steering trapezoid when turning the wheels and studying the change in the pressure of the working fluid and the movement of the hydraulic cylinder rod under different load modes. Research methodology. The method of simulation modeling is used, when the variables describing the behavior of the steering hydraulic cylinder are determined by certain load algorithms and operating fluid

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Shukurov, Z. K., B. Sh Yuldoshev, and A. Begjanov. "Investigation of hydraulic resistance of pulsating flows of viscous fluid in elastic pipe." E3S Web of Conferences 365 (2023): 03026. http://dx.doi.org/10.1051/e3sconf/202336503026.

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In recent years, flexible pipes made of synthetic polymer materials are being rapidly introduced into practice. Pulsating currents are important in driving water and other liquids in main pipes. This paper examines the pulsating currents of a viscous incompressible fluid in an elastic pipe. The necessary hydrodynamic parameters will be determined by solving the problem, such as distributions of pressure, velocity, flow rate, propagation velocity of the pressure pulse wave, and their attenuation. For the first time in this article, the decrease in hydraulic resistance in a pulsating flow throug

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Rakhimov, Kudrat, Abdukhalil Rakhimov, Djamila Khusanova, Rustam Sultonov, and Feruzjon Ochildiyev. "Fluid movement in pipeline with one inflow." E3S Web of Conferences 365 (2023): 03006. http://dx.doi.org/10.1051/e3sconf/202336503006.

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In engineering practice, we often encounter issues related to the connection of flows. In which, in the butt places, vortex zones are observed. The article considers the problem of fluid motion in a channel with one inflow. The scientific papers devoted to the connection of flows are studied. The pressure and non-pressure movement of fluid in the channels, as well as the influence of the structural elements of the system on the hydraulic parameters of the flow, are considered. In the article, the functions describing the main parameters of the channel and inflow are constructed using the formu

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Fortin, Michel. "Finite element solution of the Navier—Stokes equations." Acta Numerica 2 (January 1993): 239–84. http://dx.doi.org/10.1017/s0962492900002373.

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Viscous incompressible flows are of considerable interest for applications. Let us mention, for example, the design of hydraulic turbines or rheologically complex flows appearing in many processes involving plastics or molten metals. Their simulation raises a number of difficulties, some of which are likely to remain while others are now resolved. Among the latter are those related to incompressibility which are also present in the simulation of incompressible or nearly incompressible elastic materials. Among the still unresolved are those associated with high Reynolds numbers which are also m

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Michalczyk, J. "Dynamic Influences of Non-Stationary Liquid Flows in Fluid Drives of Heavy Metallurgical Machines on System Dynamics and Reaction for Surroundings." Archives of Metallurgy and Materials 60, no. 1 (2015): 71–75. http://dx.doi.org/10.1515/amm-2015-0011.

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Abstract The influence of liquids contained in hydraulic pipes of drives of heavy metallurgical machines, e.g. forging hammers and presses, on reduced mass and system dynamics and forces and moments of reaction for surroundings, was investigated in the paper. Most of these calculations were performed on the bases of the volumetric flow rate only, without knowing the rate distribution on the pipe cross-section. Investigations included hydraulic pipes of variable diameters and arbitrary pathways in the space, for the stationary and non-stationary flows.

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Thual, O. "Modelling rollers for shallow water flows." Journal of Fluid Mechanics 728 (July 1, 2013): 1–4. http://dx.doi.org/10.1017/jfm.2013.238.

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AbstractHydraulic jumps, roll waves or bores in open channel flows are often treated as singularities by hydraulicians while slowly varying shallow water flows are described by continuous solutions of the Saint-Venant equations. Richard & Gavrilyuk (J. Fluid Mech., vol. 725, 2013, pp. 492–521) have enriched this model by introducing an equation for roller vorticity in a very elegant manner. This new model matches several experimental results that have resisted theoretical approaches for decades. This is the case of the roller of a stationary hydraulic jump as well as the oscillatory instab

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Biscarini, Chiara, Silvia Di Francesco, Fernando Nardi, and Piergiorgio Manciola. "Detailed Simulation of Complex Hydraulic Problems with Macroscopic and Mesoscopic Mathematical Methods." Mathematical Problems in Engineering 2013 (2013): 1–14. http://dx.doi.org/10.1155/2013/928309.

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The numerical simulation of fast-moving fronts originating from dam or levee breaches is a challenging task for small scale engineering projects. In this work, the use of fully three-dimensional Navier-Stokes (NS) equations and lattice Boltzmann method (LBM) is proposed for testing the validity of, respectively, macroscopic and mesoscopic mathematical models. Macroscopic simulations are performed employing an open-source computational fluid dynamics (CFD) code that solves the NS combined with the volume of fluid (VOF) multiphase method to represent free-surface flows. The mesoscopic model is a

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Borghi, M., G. Cantore, M. Milani, and R. Paoluzzi. "Analysis of hydraulic components using computational fluid dynamics models." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 212, no. 7 (1998): 619–29. http://dx.doi.org/10.1243/0954406981521583.

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This paper presents some results obtained during the computational fluid dynamics (CFD) analysis of internal flows inside a hydraulic component, using a scaling technique applied to numerical pre- and post-processing. The main aim of the work is to demonstrate the reduction of computational work needed for a complete analysis of component behaviour over a wide range of operating conditions. This result is achieved through the adoption of a methodology aimed at giving the highest level of generality to a non-dimensional solution, thereby overcoming the two major limitations encountered in the u

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Hormozi, S., and I. A. Frigaard. "Dispersion of solids in fracturing flows of yield stress fluids." Journal of Fluid Mechanics 830 (September 29, 2017): 93–137. http://dx.doi.org/10.1017/jfm.2017.465.

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Solids dispersion is an important part of hydraulic fracturing, both in helping to understand phenomena such as tip screen-out and spreading of the pad, and in new process variations such as cyclic pumping of proppant. Whereas many frac fluids have low viscosity, e.g. slickwater, others transport proppant through increased viscosity. In this context, one method for influencing both dispersion and solids-carrying capacity is to use a yield stress fluid as the frac fluid. We propose a model framework for this scenario and analyse one of the simplifications. A key effect of including a yield stre

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Lai, W. M., W. Gu, and V. C. Mow. "Flows of Electrolytes Through Charged Hydrated Biological Tissue." Applied Mechanics Reviews 47, no. 6S (1994): S277—S281. http://dx.doi.org/10.1115/1.3124423.

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In this paper, analyses of the flows of water and electrolytes through charged hydrated biologic tissues (e.g., articular cartilage) are presented. These analyses are based on the triphasic mechano-electrochemical theory developed by Lai and coworkers (1991). The problems analyzed are 1-D steady permeation flows generated by a hydraulic pressure difference and/or by an osmotic pressure difference across a finite thickness layer of the tissue. The theory allows for the complete determination of the ion concentration field, the matrix strain field as well as the ion and water velocity field insi

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