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Journal articles on the topic 'Discrete Liquid Flow'

Author: Grafiati

Published: 6 September 2023

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1

Jia, Yun Fei, and De Ren Kong. "A Study on Measurement Uncertainty of a Vortex Flow Meter in Discrete Liquid Phase." Advanced Materials Research 346 (September 2011): 593–99. http://dx.doi.org/10.4028/www.scientific.net/amr.346.593.

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The measurement uncertainty of vortex flowmeter was examined when the gas flow measured was injected with liquid. This test was performed in a multiphase flow calibration facility. A vortex flowmeter of 50 mm in diameter was installed in a 100 mm test section. The gas volume flow rate was held in 141m3/h and the liquid was injected into the gas flow. The liquid volume fractions used at the gas volume flow rate were 0.0106%, 0.0213%,0.0355%,0.0496%,0.0638%,0.0780% and 0.0922%. The small amount of liquid in the gas as discrete droplet is called discrete liquid phase. Analysis on the vortex shedd

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2

Li, Liang Chao. "CFD-DPM Modeling of Gas-Liquid Flow in a Stirred Vessel." Advanced Materials Research 550-553 (July 2012): 979–83. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.979.

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Gas-liquid flow in a stirred vessel was simulated numerically with computational fluid dynamics(CFD). Gas was treated as discrete phase and described by discrete phase model (DPM), while the liquid was considered as a continuum and solved under Euler reference frame. The liquid velocity, gas holdup and gas residence time distribution in the stirred vessel were predicted. The simulation results show that gas dispersion in the stirred vessel is very non-uniformity and high gas holdup is found in the centre of the stirred vessel and vortexes while relatively low in bottom region and region betwee

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3

Chaitanya, G. V. A., and G. S. Gupta. "Liquid flow in heap leaching using the discrete liquid flow model and graph-based void search algorithm." Hydrometallurgy 221 (August 2023): 106151. http://dx.doi.org/10.1016/j.hydromet.2023.106151.

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4

Hagen, Thijmen, Stefan Luding, Devaraj van der Meer, Vanessa Magnanimo, and Ahmed Jarray. "Liquid migration in flowing granular materials." EPJ Web of Conferences 249 (2021): 09001. http://dx.doi.org/10.1051/epjconf/202124909001.

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In partially wet granular beds, liquid migrates between particles due to collisions and contacts. This, in turn, influences the flow behaviour of the granular bed. We investigate liquid redistribution in moving monodisperse particles in a rotating drum using Discrete Element Method (DEM) simulations. For weak capillary forces, liquid re-distribution, induced by the continuous flow of particles, leads to concentration of the liquid in the core of the bed, where the flow is quasi-static. High capillary forces reduce the surface flow speed and granular temperature. This decreases liquid bridges r

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Gadi, Venkat Arunchaitanya, and Govind Sharan Gupta. "Discrete Liquid Flow Behavior in a 2D Random Packed Bed." ISIJ International 63, no. 5 (2023): 810–21. http://dx.doi.org/10.2355/isijinternational.isijint-2022-529.

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6

Zhang, Junping, Norman Epstein, John R. Grace, and Kokseng Lim. "Bubble Characteristics in a Developing Vertical Gas–Liquid Upflow Using a Conductivity Probe." Journal of Fluids Engineering 122, no. 1 (1999): 138–45. http://dx.doi.org/10.1115/1.483250.

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Experiments were carried out in an 82.6-mm-dia column with a perforated distributor plate. Conductivity probes on the axis of the column were used to measure local bubble properties in the developing flow region for superficial air velocities from 0.0018 to 6.8 m/s and superficial water velocities from 0 to 0.4 m/s, corresponding to the discrete bubble, dispersed bubble, coalesced bubble, slug, churn, bridging, and annular flow regimes. Bubble frequency increased linearly with gas velocity in the discrete and dispersed bubble regimes. Bubble frequency also increased with gas velocity in the sl

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Roques, J. F., V. Dupont, and J. R. Thome. "Falling Film Transitions on Plain and Enhanced Tubes." Journal of Heat Transfer 124, no. 3 (2002): 491–99. http://dx.doi.org/10.1115/1.1458017.

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In falling film heat transfer on horizontal tube bundles, liquid flow from tube to tube occurs as a falling jet that can take on different flow modes. At low flow rates, the liquid film falls as discrete droplets. At higher flow rates, these droplets form discretely spaced liquid columns. At still higher flow rates, the film falls as a continuous sheet of liquid. Predicting the flow transitions between these flow modes is an essential step in determining the heat transfer coefficient for the particular flow mode, whether for a single phase process or for falling film condensation or evaporatio

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8

李, 静. "A Second-Order Fully Discrete Scheme for Nematic Liquid Crystal Flow." Advances in Applied Mathematics 11, no. 04 (2022): 1700–1707. http://dx.doi.org/10.12677/aam.2022.114185.

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9

Wang, Cheng Jun, Long Li, Chang Guo Xue, and Qiong Liu. "Research on the Influence of Multidimensional Vibration on Casting Filling Capacity Based on Discrete Element Method." Key Engineering Materials 693 (May 2016): 1263–71. http://dx.doi.org/10.4028/www.scientific.net/kem.693.1263.

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To analyze liquid metal flow in mold under multidimensional vibration condition, discrete element method (DEM) is taken to approximately stimulate liquid metal flow and to simulate numerically liquid metal flow filling process in casting technique under multidimensional vibration. The orthogonal experiment design is taken to study vibration dimension, frequency as well as amplitude influence on liquid metal filling capacity; Through EDEM platform, numerical simulation research in each test scheme can be carried out to get influence of filling time upon sensitivity degree of each parameter inde

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10

FAN, XIAOFENG, and JIANGFENG WANG. "A MARKER-BASED EULERIAN-LAGRANGIAN METHOD FOR MULTIPHASE FLOW WITH SUPERSONIC COMBUSTION APPLICATIONS." International Journal of Modern Physics: Conference Series 42 (January 2016): 1660159. http://dx.doi.org/10.1142/s2010194516601599.

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The atomization of liquid fuel is a kind of intricate dynamic process from continuous phase to discrete phase. Procedures of fuel spray in supersonic flow are modeled with an Eulerian-Lagrangian computational fluid dynamics methodology. The method combines two distinct techniques and develops an integrated numerical simulation method to simulate the atomization processes. The traditional finite volume method based on stationary (Eulerian) Cartesian grid is used to resolve the flow field, and multi-component Navier-Stokes equations are adopted in present work, with accounting for the mass excha

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11

Wang, G. X., D. Y. Liu, J. D. Litster, A. B. Yu, S. J. Chew, and P. Zulli. "Experimental and numerical simulation of discrete liquid flow in a packed bed." Chemical Engineering Science 52, no. 21-22 (1997): 4013–19. http://dx.doi.org/10.1016/s0009-2509(97)00244-3.

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12

Bezrukov, Artem, and Yury Galyametdinov. "Orientation Behavior of Nematic Liquid Crystals at Flow-Wall Interfaces in Microfluidic Channels." Coatings 13, no. 1 (2023): 169. http://dx.doi.org/10.3390/coatings13010169.

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This work characterizes the orientation behavior of nematic liquid crystals in pressure-driven flows of microfluidic channels at interfaces between the flow and microchannel walls. The impact of flow velocity and microchannel geometry on the orientation of liquid crystals in single-phase and two-phase flows is discussed. Polarizing optical microscopy images revealed the homeotropic orientation of liquid crystal molecules at microchannel walls at zero flow velocities, which gradually transitioned into planar alignment along the microchannel axis when the flow velocity increased in the 50 μm/s t

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13

Sun, Chunhua, Zhi Ning, Xinqi Qiao, et al. "Numerical simulation of gas–liquid flow behavior in the nozzle exit region of an effervescent atomizer." International Journal of Spray and Combustion Dynamics 11 (January 2019): 175682771882159. http://dx.doi.org/10.1177/1756827718821592.

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The pressure drop and particular geometric structure of the nozzle exit region of an effervescent atomizer cause complex changes in the flow pattern, which could affect the spray performance. In this study, the gas–liquid two-phase flow behavior in the nozzle exit region of the effervescent atomizer was investigated numerically. The results show that the flow behaviors in the nozzle exit region have disparate characteristics with different upstream flow regimes. For upstream churn flow, the liquid film morphology is closely related to fluctuation in the gas–liquid velocity, and the flow parame

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14

Lezzi, A. M., and A. Prosperetti. "The stability of an air film in a liquid flow." Journal of Fluid Mechanics 226 (May 1991): 319–47. http://dx.doi.org/10.1017/s0022112091002409.

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A number of processes in which air is entrained in a flow appear to involve the formation of a thin air film between a relatively fast liquid stream and a region of slow recirculation. Eventually, the film breaks into bubbles. This study addresses a possible mechanism causing this process. The linear stability of a vertical film of a viscous gas bounded by liquid in uniform motion on one side, and by liquid at rest on the other side, is studied. Instabilities are found that, depending on the parameter values of the undisturbed flow, are controlled by two basic mechanisms. One is due to the vel

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15

Wang, Peng, Xinyu Zhu, and Yi Li. "Analysis of Flow and Wear Characteristics of Solid–Liquid Two-Phase Flow in Rotating Flow Channel." Processes 8, no. 11 (2020): 1512. http://dx.doi.org/10.3390/pr8111512.

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To study the flow characteristics and the wear distribution of pumps at different rotation speeds, a rotating disc with three blades was designed for experiments. Numerical simulations were conducted using a computational fluid dynamics-discrete phase model (CFD–DPM) approach. The experimental and numerical results were compared, and the flow characteristics and wear behaviors were determined. As the speed increased, the particles at the blade working surface aggregated. The particle velocity gradually increased at the outlet of the channel. The severe wear areas were all located in the outlet

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16

Koropchak, John A., Lori Allen, and Joe M. Davis. "Aerosol Interfacing Effects on Discrete Sample Introduction Coupled with Spectrometric Detection." Applied Spectroscopy 46, no. 4 (1992): 682–89. http://dx.doi.org/10.1366/0003702924125023.

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Aerosol techniques are commonly employed to interface discrete sampling techniques (flow injection analysis and liquid chromatography) with various detectors. The effects of these interfaces on discrete signals have not been described, nor has a rationale been established for presumed differences in band broadening due to aerosol-phase extra-column volume, compared to liquid-phase extra-column volume. In this report, the effects of laminar flow through several transport geometries on signal recovery and band broadening for both wet and desolvated aerosols are investigated. Data presented for t

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17

Li, Jia-Xin, Yun-Ze Li, En-Hui Li, and Tong Li. "Numerical Investigation on the Thermodynamic Characteristics of a Liquid Film upon Spray Cooling Using an Air-Blast Atomization Nozzle." Entropy 22, no. 3 (2020): 308. http://dx.doi.org/10.3390/e22030308.

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This paper developed a three-dimensional model to simulate the process of atomization and liquid film formation during the air-blast spray cooling technological process. The model was solved using the discrete phase model method. Several factors including the thermodynamic characteristics of the liquid film as well as the spray quality with different spray mass flow rates under different spray heights were numerically investigated and discussed. The results show that the varied spray height has little effect on the Sauter Mean Diameter (d32) of the spray droplet, while the thermodynamic charac

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18

Li, Bo, Jian ming Wang, Qi Wang, Xiu yan Li, and Xiaojie Duan. "A novel gas/liquid two-phase flow imaging method through electrical resistance tomography with DDELM-AE sparse dictionary." Sensor Review 40, no. 4 (2020): 407–20. http://dx.doi.org/10.1108/sr-01-2019-0018.

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Purpose The purpose of this paper is to explore gas/liquid two-phase flow is widely existed in industrial fields, especially in chemical engineering. Electrical resistance tomography (ERT) is considered to be one of the most promising techniques to monitor the transient flow process because of its advantages such as fast respond speed and cross-section imaging. However, maintaining high resolution in space together with low cost is still challenging for two-phase flow imaging because of the ill-conditioning of ERT inverse problem. Design/methodology/approach In this paper, a sparse reconstruct

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19

Wang, Yanping, Ruilin Tao, Chuanfeng Han, Weiqin Li, Tielin He, and Zuchao Zhu. "Numerical study on flow and wear characteristics of dense fine particle solid–liquid two-phase flow in centrifugal pump." AIP Advances 12, no. 4 (2022): 045109. http://dx.doi.org/10.1063/5.0079425.

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The solid–liquid two-phase centrifugal pump is one of the core power equipment of solid phase material hydraulic transportation, widely used in hydraulic engineering, petrochemical industry, marine metal mineral exploitation, urban sewage treatment, and other sectors of the national economy. There is a significant increase in the need to transport dense fine particle slurry in industrial production. Under this condition, the influence of particle parameters on the performance of the centrifugal pump is still not clear. In order to study the flow and wear characteristics of dense fine particle

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20

Gersey, C. O., and I. Mudawar. "Orientation Effects on Critical Heat Flux From Discrete, In-Line Heat Sources in a Flow Channel." Journal of Heat Transfer 115, no. 4 (1993): 973–85. http://dx.doi.org/10.1115/1.2911394.

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The effects of flow orientation on critical heat flux (CHF) were investigated on a series of nine in-line simulated microelectronic chips in Fluorinert FC-72. The chips were subjected to coolant in upflow, downflow, or horizontal flow with the chips on the top or bottom walls of the channel with respect to gravity. Changes in angle of orientation affected CHF for velocities below 200 cm/s, with some chips reaching CHF at heat fluxes below the pool boiling and flooding-induced CHF values. Increased subcooling was found to dampen this adverse effect of orientation slightly. Critical heat flux wa

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21

Su, Te Cheng, Catherine O'Sullivan, Hideyuki Yasuda, and Christopher M. Gourlay. "Understanding the Rheological Transitions in Semi-Solid Alloys by a Combined <i>In Situ</i> Imaging and Granular Micromechanics Modeling Approach." Solid State Phenomena 327 (January 10, 2022): 127–32. http://dx.doi.org/10.4028/www.scientific.net/ssp.327.127.

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To gain better understanding of rheological transitions from suspension flow to granular deformation and shear cracking, this research conducted shear-deformation on globular semi-solid Al-Cu alloys to study the rheological behavior of semi-solid as a function of solid fraction (38% - 85%) and shear rate (10-4 – 10-1 s-1) under real-time synchrotron radiography observation. By analyzing 17 X-ray imaging datasets, we define three rheological transitions: (i) the critical solid fraction from a suspension to a loosely percolating assembly; (ii) from the net contraction of a loose assembly to the

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22

Hu, X., and A. M. Jacobi. "The Intertube Falling Film: Part 2—Mode Effects on Sensible Heat Transfer to a Falling Liquid Film." Journal of Heat Transfer 118, no. 3 (1996): 626–33. http://dx.doi.org/10.1115/1.2822678.

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When a liquid film falls from one horizontal tube to another below it, the flow may take the form of discrete droplets, jets, or a continuous sheet; the mode plays an important role in the heat transfer. Experiments are reported that explore the local heat transfer behavior for each of these flow patterns, and the results are related to the important features of the flow. Spatially averaged Nusselt numbers are presented and discussed, and new mode-specific design correlations are provided. This research is part of an overall study of horizontal-tube, falling-film flow and heat transfer.

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23

Delnoij, E., F. A. Lammers, J. A. M. Kuipers, and W. P. M. van Swaaij. "Dynamic simulation of dispersed gas-liquid two-phase flow using a discrete bubble model." Chemical Engineering Science 52, no. 9 (1997): 1429–58. http://dx.doi.org/10.1016/s0009-2509(96)00515-5.

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24

Kmec, Jakub, Miloslav Šír, Tomáš Fürst, and Rostislav Vodák. "Semi-continuum modeling of unsaturated porous media flow to explain Bauters' paradox." Hydrology and Earth System Sciences 27, no. 6 (2023): 1279–300. http://dx.doi.org/10.5194/hess-27-1279-2023.

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Abstract. In the gravity-driven free infiltration of a wetting liquid into a homogeneous unsaturated porous medium, the flow pattern is known to depend significantly on the initial saturation. Point source infiltration of a liquid into an initially dry porous medium produces a single finger with an oversaturated tip and an undersaturated tail. In an initially wet medium, a diffusion-like plume is produced with a monotonic saturation profile. We present a semi-continuum model, based on a proper scaling of the retention curve, which is discrete in space and continuous in time. We show that the s

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25

Mudawar, Issam, and Douglas E. Maddox. "Enhancement of Critical Heat Flux From High Power Microelectronic Heat Sources in a Flow Channel." Journal of Electronic Packaging 112, no. 3 (1990): 241–48. http://dx.doi.org/10.1115/1.2904373.

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Several surface augmentation techniques were examined in an investigation of enhancement of critical heat flux (CHF) from a simulated electronic chip to a fluorocarbon (FC-72) liquid in a vertical channel. A parametric comparison of boiling performances is presented for a smooth surface and for surfaces with low-profile microgrooves, low-profile microstuds, and high-profile pin fins. Critical heat fluxes as high as 361 W/cm2 were achieved using a combination of moderate flow velocity, high subcooling and surface enhancement. A semiempirical model constructed previously for CHF from a smooth di

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26

Cwudziński, A. "Numerical Simulation of Behaviour a Non-Metallic Inclusions in an One-Strand Slab Tundish with Steel Flow Controll Devices." Archives of Metallurgy and Materials 56, no. 3 (2011): 611–18. http://dx.doi.org/10.2478/v10172-011-0066-0.

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Numerical Simulation of Behaviour a Non-Metallic Inclusions in an One-Strand Slab Tundish with Steel Flow Controll DevicesAn effective refining of liquid steel can be carried out either in a tundish or in the mould of a CSC machine. Being a flow reactor, the tundish performs the function of a link between the steelmaking ladle and the mould. Owing to this fact, the liquid steel resides in the tundish for a specific time, which enables the tundish to be used for refining purposes. For modification oftundish internal working space, two types of flow control device (FCD), namely a ceramic gas-per

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27

Chen, Fuzhen, Haorui Li, Yang Gao, and Hong Yan. "Two-particle method for liquid–solid two-phase mixed flow." Physics of Fluids 35, no. 3 (2023): 033317. http://dx.doi.org/10.1063/5.0140599.

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Liquid–solid two-phase flows are a very important class of multiphase flow problems widely existing in industry and nature. This paper establishes a two-phase model for liquid–solid two-phase flows considering multiphase states of granular media. The volume fraction is defined by the solid phase, determining the material properties of the two phases, and momentum is exchanged between the phases by drag and pressure gradient forces. On this basis, a two-particle method for simulating the liquid–solid two-phase flow is proposed by coupling smoothed particle hydrodynamics with smoothed discrete p

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28

Wang, Y. Q., Ming Rang Cao, Sheng Qiang Yang, and Wen Hui Li. "Numerical Simulation of Liquid-Solid Two-Phase Flow Field in Discharge Gap of High-Speed Small Hole EDM Drilling." Advanced Materials Research 53-54 (July 2008): 409–14. http://dx.doi.org/10.4028/www.scientific.net/amr.53-54.409.

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The flow field characteristics have a significant effect on the machining stability in high-speed small hole EDM drilling. Thus, Lagrangian discrete phase model (DPM) has been developed to simulate the gap liquid-solid two-phase flow field. The numerical calculation is based on the standard k-ε turbulent model, and the SIMPLEC algorithm is used in the simulation. All the governing equations are solved by software Fluent 6.2. Through numerical simulation, the pressure distribution, the velocity distribution of the dielectric liquid, traces of debris particles, and the debris particle concentrat

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29

Zhao, Yongpeng, Xiangyang Sun, and Zaiping Nie. "Streaming Potential in Gas Phase Discrete Unsaturated Pore." Electronics 12, no. 1 (2022): 72. http://dx.doi.org/10.3390/electronics12010072.

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The seismoelectric effect of porous media is the main basis for seismoelectric logging. At present, most of the studies on the seismoelectric effect in unsaturated porous media adopt the model of pores with continuous distribution of gas and liquid. There is a lack of theoretical research on the micro mechanism of the seismoelectric effect of unsaturated porous media with discrete gas phase, and the existing studies do not consider the effect of the electric double layer at the gas–liquid interface on the seismoelectric effect. Based on the capillary model, this work adopted the gas phase disc

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30

Ren, Junjie, Ping Guo, and Zhaoli Guo. "Rectangular Lattice Boltzmann Equation for Gaseous Microscale Flow." Advances in Applied Mathematics and Mechanics 8, no. 2 (2014): 306–30. http://dx.doi.org/10.4208/aamm.2014.m672.

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AbstractThe lattice Boltzmann equation (LBE) is considered as a promising approach for simulating flows of liquid and gas. Most of LBE studies have been devoted to regular square LBE and few works have focused on the rectangular LBE in the simulation of gaseous microscale flows. In fact, the rectangular LBE, as an alternative and efficient method, has some advantages over the square LBE in simulating flows with certain computational domains of large aspect ratio (e.g., long micro channels). Therefore, in this paper we expand the application scopes of the rectangular LBE to gaseous microscale f

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31

Yuan, Zhe, Wen Xing Ma, Wei Cai, Li Dan Fan, and Jian Jun Song. "Temperature Field Analysis on the Hydrodynamic Retarder of Heavy Vehicle." Advanced Materials Research 503-504 (April 2012): 1025–28. http://dx.doi.org/10.4028/www.scientific.net/amr.503-504.1025.

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According to the working characteristics of the hydrodynamic retarder, the hydrodynamic retarder D300 is chosen in this research. Based on three-dimensional flow theory, the internal temperature fields of hydrodynamic retarder with different liquid-filled ratios of 100%, 75%, 50%, 25% are numerically simulated. The standard k-ε model is chosen as turbulent model for calculation. The SIMPLEC algorithm is chosen as velocity-pressure coupling algorithm and the second order upwind scheme is used as discrete method. The mixture multiphase model is used to calculate the unsteady gas-liquid two-phase

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32

Aghaee, Mohammad, Rouhollah Ganjiazad, Ramin Roshandel, and Mohammad Ali Ashjari. "Two-phase flow separation in axial free vortex flow." Journal of Computational Multiphase Flows 9, no. 3 (2017): 105–13. http://dx.doi.org/10.1177/1757482x17699411.

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Multi-phase flows, particularly two-phase flows, are widely used in the industries, hence in order to predict flow regime, pressure drop, heat transfer, and phase change, two-phase flows should be studied more precisely. In the petroleum industry, separation of phases such as water from petroleum is done using rotational flow and vortices; thus, the evolution of the vortex in two-phase flow should be considered. One method of separation requires the flow to enter a long tube in a free vortex. Investigating this requires sufficient knowledge of free vortex flow in a tube. The present study exam

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GASSIAT, PAUL, HUYÊN PHAM, and MIHAI SÎRBU. "OPTIMAL INVESTMENT ON FINITE HORIZON WITH RANDOM DISCRETE ORDER FLOW IN ILLIQUID MARKETS." International Journal of Theoretical and Applied Finance 14, no. 01 (2011): 17–40. http://dx.doi.org/10.1142/s0219024911006243.

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We study the problem of optimal portfolio selection in an illiquid market with discrete order flow. In this market, bids and offers are not available at any time but trading occurs more frequently near a terminal horizon. The investor can observe and trade the risky asset only at exogenous random times corresponding to the order flow given by an inhomogenous Poisson process. By using a direct dynamic programming approach, we first derive and solve the fixed point dynamic programming equation satisfied by the value function, and then perform a verification argument which provides the existence

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Hanus, Robert, Marcin Zych, Barbara Wilk, Marek Jaszczur, and Dariusz Świsulski. "Signals features extraction in radioisotope liquid-gas flow measurements using wavelet analysis." EPJ Web of Conferences 213 (2019): 02023. http://dx.doi.org/10.1051/epjconf/201921302023.

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Knowledge of the structure of a flow is significant for the proper conduct of a number of industrial processes. In this case, a description of a two-phase flow regimes is possible by use of the time-series analysis in time, frequency and state-space domain. In this article the Discrete Wavelet Transform (DWT) is applied for analysis of signals obtained for water-air flow using gamma ray absorption. The presented method was illustrated by use data collected in experiments carried out on the laboratory hydraulic installation with a horizontal pipe, equipped with two Am-241 radioactive sources an

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35

Luca, Luigi De, and Carosena Meola. "Surfactant effects on the dynamics of a thin liquid sheet." Journal of Fluid Mechanics 300 (October 10, 1995): 71–85. http://dx.doi.org/10.1017/s0022112095003612.

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The dynamics of a free-surface slender two-dimensional stream (liquid sheet) issuing from a nozzle in the gravitational field in still air, under the effect of surface-active agents, are analysed experimentally. The particular test section geometry (the liquid is forced to assume a bidimensional form between two vertical guides and a horizontal plate placed at a certain variable distance from the nozzle exit section) employed in this study gives rise to various flow regimes depending on the governing parameters: liquid flow rate, sheet height, surface pressure, gravity. Two basic phenomena are

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36

Li, Yi, Xiaodong Zeng, Wenshuai Lv, and Zhaohui He. "Centrifugal pump wear for solid–liquid two-phase flows based on computational fluid dynamics–discrete element method coupling." Advances in Mechanical Engineering 12, no. 7 (2020): 168781402093795. http://dx.doi.org/10.1177/1687814020937951.

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In the conveying process of a solid–liquid two-phase medium, the wear of the flow passage components is unavoidable. In this study, the solid–liquid two-phase flow in a centrifugal pump was numerically simulated by computational fluid dynamics–discrete element method coupling. For particle diameters up to 3 mm, the particle–particle and particle–wall interactions were considered in the simulation. Two-phase performance and wear experiments for different flow rates and particle concentrations were conducted. The wear experiment was carried out for 48 h at each mass concentration. In these exper

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Lyu, Xiuxiu, Yujie Zhu, Chi Zhang, Xiangyu Hu, and Nikolaus A. Adams. "Modeling of Cavitation Bubble Cloud with Discrete Lagrangian Tracking." Water 13, no. 19 (2021): 2684. http://dx.doi.org/10.3390/w13192684.

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In this paper, a Lagrangian-Eulerian (LE) two-way coupling model is developed to numerically study the cavitation bubble cloud. In this model, the gas-liquid mixture is treated directly as a continuous and compressible fluid and the governing equations are solved by methods in Eulerian descriptions. An isobaric closure exhibiting better consistency properties is applied to evaluate the pressure of gas-liquid mixture. The dispersed gas/vapor bubbles are tracked in a Lagrangian fashion, and their compression and expansion are described by a modified Rayleigh-Plesset equation, which considers the

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Wang, Cheng-shan, Xiao-jing Mu, Shao-bo Zheng, Guo-chang Jiang, Xing-guo Xiao, and Wen-zhong Wang. "A New Mathematical Model for Description of the Liquid Discrete Flow Within a Packed Bed." Journal of Iron and Steel Research International 15, no. 6 (2008): 16–23. http://dx.doi.org/10.1016/s1006-706x(08)60259-9.

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Salvador, Fernanda Falqueto, Nathcha Kare Gonçalves Silva, Marcos Antonio de Souza Barrozo, and Luiz Gustavo Martins Vieira. "Study of the Capacity in a Totally Permeable Hydrocyclone." Materials Science Forum 802 (December 2014): 250–55. http://dx.doi.org/10.4028/www.scientific.net/msf.802.250.

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Hydrocyclones are equipments that separate a discrete phase (solid, liquid or gas) from a continuous phase (liquid) by generating a centrifugal field. The objective of this work was to study, experimentally, the incorporation effect of cylindrical and conical permeable walls (CyCoFH) on an optimized geometry hydrocyclone (H11) to evaluate the equipment’s processing capacity. By inserting a filtering cone and cylinder, during the operation of these separators, besides the traditionally observed streams (underflow and overflow), there is an additional liquid stream resulting from the filtering p

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Jeswani, A. L., and J. A. Roux. "Manufacturing Modeling of Three-Dimensional Resin Injection Pultrusion Process Control Parameters for Polyester/Glass Rovings Composites." Journal of Manufacturing Science and Engineering 129, no. 1 (2006): 143–56. http://dx.doi.org/10.1115/1.2383148.

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Pultrusion, sometimes referred to as continuous resin transfer molding process, is a continuous, cost-effective method for manufacturing composite materials with constant cross sections (such as rod stock, beams, channels, and tubing). The objective of this study is to improve the fiber reinforcement wetout and thus the quality of the pultruded part in the injection pultrusion process. The complete wetout of the dry reinforcement by the liquid resin depends on various design and process parameters. The process parameters modeled in this study are fiber pull speed, fiber volume fraction, and vi

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Klaučo, Martin, Ľuboš Čirka, and Juraj Kukla. "Non-linear model predictive control of conically shaped liquid storage tanks." Acta Chimica Slovaca 11, no. 2 (2018): 141–46. http://dx.doi.org/10.2478/acs-2018-0020.

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Abstract This paper deals with the analysis and design of a model predictive control (MPC) strategy used in connection with level control in conically shaped industrial liquid storage tanks. The MPC is based on a non-linear dynamic model describing changes of the liquid level concerning changes in the inlet flow of the liquid. Euler discretization of the dynamic system was applied to transform con-tinuous time dynamics to its discrete-time counterpart used in non-linear MPC (NMPC) design. By means of a simulation case study, NMPC has been shown to track the changes of the liquid level, hence p

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Fu, S. C., R. M. C. So, and W. W. F. Leung. "A Discrete Flux Scheme for Aerodynamic and Hydrodynamic Flows." Communications in Computational Physics 9, no. 5 (2011): 1257–83. http://dx.doi.org/10.4208/cicp.311009.241110s.

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AbstractThe objective of this paper is to seek an alternative to the numerical simulation of the Navier-Stokes equations by a method similar to solving the BGK-type modeled lattice Boltzmann equation. The proposed method is valid for both gas and liquid flows. A discrete flux scheme (DFS) is used to derive the governing equations for two distribution functions; one for mass and another for thermal energy. These equations are derived by considering an infinitesimally small control volume with a velocity lattice representation for the distribution functions. The zero-order moment equation of the

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Aliiev, Elchyn, Ihor Babyn, and Serhiy Sokol. "NUMERICAL SIMULATION OF THE PROCESS OF AERODYNAMIC SEPARATION OF FINE-GRAINED BULK MATERIAL." ENGINEERING, ENERGY, TRANSPORT AIC, no. 1(120) (May 1, 2023): 5–13. http://dx.doi.org/10.37128/2520-6168-2023-1-1.

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Various methods can be used to numerically simulate the aerodynamic separation of fine-grained bulk material, including discrete element methods, finite element methods, and bounded domain methods. In all these methods, these equations are solved numerically, and the results are used to determine the trajectories and velocities of air and particles. The Discrete Element Method (DEM), on the basis of which the study will be conducted, is designed for modeling the granular flow of materials. The purpose of the research is to simulate the movement of fine-grained loose material under the influenc

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Qu, Yong Lei, Shi Bu, and Bo Wan. "A 3D Numerical Investigation on Droplets Distribution in a Wave-Plate Separator." Advanced Materials Research 842 (November 2013): 522–29. http://dx.doi.org/10.4028/www.scientific.net/amr.842.522.

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The gas-liquid flow in a wave-plate separator is extremely complex due to its three-dimensional characteristic. Numerical simulation accomplished by former investigators using two-dimensional model may be appropriate for the iteration of pressure drop, but they were far from accurate in prediction of removal efficiency. To fill the gap, a three dimensional geometrical model of wave-plate separator is set up in this paper, RNG k-ε model is employed to compute the gas phase flow field, and the droplet trajectories were predicted applying the Lagrangian method. The turbulent dispersion of droplet

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Anderson, Caitlin E., Toan Huynh, David J. Gasperino, et al. "Automated liquid handling robot for rapid lateral flow assay development." Analytical and Bioanalytical Chemistry 414, no. 8 (2022): 2607–18. http://dx.doi.org/10.1007/s00216-022-03897-9.

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AbstractThe lateral flow assay (LFA) is one of the most popular technologies on the point-of-care diagnostics market due to its low cost and ease of use, with applications ranging from pregnancy to environmental toxins to infectious disease. While the use of these tests is relatively straightforward, significant development time and effort are required to create tests that are both sensitive and specific. Workflows to guide the LFA development process exist but moving from target selection to an LFA that is ready for field testing can be labor intensive, resource heavy, and time consuming. To

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Hu, X., and A. M. Jacobi. "The Intertube Falling Film: Part 1—Flow Characteristics, Mode Transitions, and Hysteresis." Journal of Heat Transfer 118, no. 3 (1996): 616–25. http://dx.doi.org/10.1115/1.2822676.

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When a liquid film falls from one horizontal tube to another below it, the flow may take the form of discrete droplets, jets, or a continuous sheet; the mode plays an important role in the wetting and heat transfer characteristics of the film. Experiments are reported that explore viscous, surface tension, inertial, and gravitational effects on the falling-film mode transitions. New flow classifications, a novel flow regime map, and unambiguous transition criteria for each of the mode transitions are provided. This research is part of an overall study of horizontal-tube, falling-film flow and

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ZHURAVLEVA, L. A., I. A. POPKOV, АLDIAB ANAS АLDIAB ANAS, and HEIRBEIK BASSEEL HEIRBEIK BASSEEL. "Studies of flow characteristics in pressure pipelines of irrigation systems with discrete fluid sampling." Prirodoobustrojstvo, no. 5 (2022): 100–104. http://dx.doi.org/10.26897/1997-6011-2022-5-100-104.

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The purpose of the experiments is to study the characteristics of the flow in the pressure pipelines of irrigation systems with discrete liquid selection. The investigations have confi rmed a slight increase in the head along the perforated pipeline during withdrawal of the fluid, which is explained by the transition of kinetic energy to potential energy. Theoretical studies of the fluid flow with a flow rate variable along the length of the pipeline made it possible to obtain dependences that describe the characteristics of the flow in the presence of both uniform and non-uniform installation

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Tai, Zhongxu, Dongying Ju, Susumu Sato, and Kenzo Hanawa. "Discrete Coating of CNT on Carbon Fiber Surfaces and the Effect on Improving the Electrochemical Performance of VRFB Systems." Coatings 11, no. 6 (2021): 736. http://dx.doi.org/10.3390/coatings11060736.

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Carbon fiber, as an electrode material, has been widely used in all-vanadium liquid flow batteries. In order to further reduce the size of the all-vanadium storage system, it is imperative to increase the current density of the battery and to achieve high conductivity and large electrostatic capacitance. The graphitization of the electrode material and the improvement in the specific surface area of the electrode surface also greatly affect the performance of all-vanadium redox liquid flow batteries. Therefore, in this paper, carbon nanotubes (CNTs) with a small diameter and a large specific s

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Qiu, Liu-Chao, and Yu Han. "3D Simulation of Self-Compacting Concrete Flow Based on MRT-LBM." Advances in Materials Science and Engineering 2018 (2018): 1–8. http://dx.doi.org/10.1155/2018/5436020.

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A three-dimensional multiple-relaxation-time lattice Boltzmann method (MRT-LBM) with a D3Q27 discrete velocity model is applied for simulation of self-compacting concrete (SCC) flows. In the present study, the SCC is assumed as a non-Newtonian fluid, and a modified Herschel–Bulkley model is used as constitutive mode. The mass tracking algorithm was used for modeling the liquid-gas interface. Two numerical examples of the slump test and enhanced L-box test were performed, and the calculated results are compared with available experiments in literatures. The numerical results demonstrate the cap

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Cui, Xinjun, Matthew Harris, Martin Howarth, Daisy Zealey, Reegan Brown, and Jonny Shepherd. "Granular flow around a cylindrical obstacle in an inclined chute." Physics of Fluids 34, no. 9 (2022): 093308. http://dx.doi.org/10.1063/5.0101694.

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Shock waves and granular vacua are important phenomena for studying the behavior of granular materials due to the dramatic change in flow properties across shock wave and the particle-free feature at the boundary of granular vacuum. In this paper, we use experiment and numerical simulation to study the granular free-surface flow past a cylindrical obstacle in an inclined chute, where the time-dependent development of the granular flow impacting the obstacle is analyzed at both microscopic and macroscopic scales using the discrete element method (DEM) and the depth-averaged granular model, resp

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