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Journal articles on the topic 'Separation particles'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Li, Xiaohong, Junping Duan, Zeng Qu, Jiayun Wang, Miaomiao Ji, and Binzhen Zhang. "Continuous Particle Separation Driven by 3D Ag-PDMS Electrodes with Dielectric Electrophoretic Force Coupled with Inertia Force." Micromachines 13, no. 1 (2022): 117. http://dx.doi.org/10.3390/mi13010117.

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Cell separation has become @important in biological and medical applications. Dielectrophoresis (DEP) is widely used due to the advantages it offers, such as the lack of a requirement for biological markers and the fact that it involves no damage to cells or particles. This study aimed to report a novel approach combining 3D sidewall electrodes and contraction/expansion (CEA) structures to separate three kinds of particles with different sizes or dielectric properties continuously. The separation was achieved through the interaction between electrophoretic forces and inertia forces. The CEA ch

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2

Tang, Zhaojia, Liming Yu, Fenghua Wang, Na Li, Liuhong Chang, and Ningbo Cui. "Effect of Particle Size and Shape on Separation in a Hydrocyclone." Water 11, no. 1 (2018): 16. http://dx.doi.org/10.3390/w11010016.

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Given the complex separation mechanisms of the particulate mixture in a hydrocyclone and the uncertain effects of particle size and shape on separation, this study explored the influence of the maximum projected area of particles on the separation effect as well as single and mixed separations based on CFD–DEM (Computational Fluid Dynamics and Discrete Element Method) coupling and experimental test methods. The results showed that spherical particles flowed out more easily from the downstream as their sizes increased. Furthermore, with the enlargement of maximum projected area, the running spa

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3

Liu, Jingyan, Renpeng Yuan, Junqiang Wang, Yaming Ma, and Zhengguo Shang. "Research on particle separation microfluidic chip based on standing surface acoustic wave." Journal of Physics: Conference Series 2740, no. 1 (2024): 012009. http://dx.doi.org/10.1088/1742-6596/2740/1/012009.

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Abstract Microparticle and cell separation is a key process in the study of cell properties, clinical diagnosis and disease treatment. In this paper, a particle separation method based on the combination of surface acoustic wave and microfluidic technology is proposed, which uses standing surface acoustic wave to achieve the separating of polystyrene microparticles of different sizes twice in a continuous flow. Through numerical simulation of the device model and particle trajectory simulation, the optimum particle separation parameters were determined. The particle separation microfluidic chi

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4

Duan, Chenlong, Cheng Sheng, Lingling Wu, Yuemin Zhao, Jinfeng He, and Enhui Zhou. "Separation and Recovery of Fine Particles from Waste Circuit Boards Using an Inflatable Tapered Diameter Separation Bed." Scientific World Journal 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/843579.

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Recovering particle materials from discarded printed circuit boards can enhance resource recycling and reduce environmental pollution. Efficiently physically separating and recovering fine metal particles (−0.5 mm) from the circuit boards are a key recycling challenge. To do this, a new type of separator, an inflatable tapered diameter separation bed, was developed to study particle motion and separation mechanisms in the bed’s fluid flow field. For 0.5–0.25 mm circuit board particles, metal recovery rates ranged from 87.56 to 94.17%, and separation efficiencies ranged from 87.71 to 94.20%. Fo

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Li, Xiaohong, Junping Duan, Jiayun Wang, Zeng Qu, Miaomiao Ji, and BinZhen Zhang. "Continuous particle separation of microfluidic chip with integrated inertial separation and dielectrophoresis separation." AIP Advances 12, no. 3 (2022): 035148. http://dx.doi.org/10.1063/5.0075823.

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Particle separation is essential in many microfluidic systems such as biomedical analysis and chemical reactions. This study aims to report a microfluidic separation device combining dielectrophoresis force and inertial force to separate particles continuously. Most particles were separated by inertial force via passing through the contraction and expansion channel and then deviated into different outlets via interdigital electrodes. Numerical simulations using the software COMSOL Multiphysics 5.4 were performed to investigate the effects of flow rate and electric field distribution on particl

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Vaghef-Koodehi, Alaleh, and Blanca H. Lapizco-Encinas. "Switching Separation Migration Order by Switching Electrokinetic Regime in Electrokinetic Microsystems." Biosensors 14, no. 3 (2024): 119. http://dx.doi.org/10.3390/bios14030119.

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Analyte migration order is a major aspect in all migration-based analytical separations methods. Presented here is the manipulation of the migration order of microparticles in an insulator-based electrokinetic separation. Three distinct particle mixtures were studied: a binary mixture of particles with similar electrical charge and different sizes, and two tertiary mixtures of particles of distinct sizes. Each one of the particle mixtures was separated twice, the first separation was performed under low voltage (linear electrokinetic regime) and the second separation was performed under high v

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7

Frank, Uwe, Jana Dienstbier, Florentin Tischer, et al. "Multidimensional Fractionation of Particles." Separations 10, no. 4 (2023): 252. http://dx.doi.org/10.3390/separations10040252.

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The increasing complexity in particle science and technology requires the ability to deal with multidimensional property distributions. We present the theoretical background for multidimensional fractionations by transferring the concepts known from one dimensional to higher dimensional separations. Particles in fluids are separated by acting forces or velocities, which are commonly induces by external fields, e.g., gravitational, centrifugal or electro-magnetic fields. In addition, short-range force fields induced by particle interactions can be employed for fractionation. In this special cas

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8

Giesler, Jasper, Laura Weirauch, Jorg Thöming, Georg R. Pesch, and Michael Baune. "Dielectrophoretic Particle Chromatography: From Batch Processing to Semi-Continuous High-Throughput Separation." Powders 3, no. 1 (2024): 54–64. http://dx.doi.org/10.3390/powders3010005.

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The development of highly selective separation processes is a focus of current research. In 2016, the German Science Foundation funded a priority program SPP 2045 “MehrDimPart—highly specific multidimensional fractionation of fine particles with technical relevance” that aims to develop new or enhance existing approaches for the separation of nano- and micrometer-sized particles. Dielectrophoretic separators achieve highly selective separations of (bio-)particles in microfluidic devices or can handle large quantities when non-selective separation is sufficient. Recently, separator designs were

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9

Fan, Xuchen, Yuping Fu, Yongliang He, and Liying Sun. "Study on Separation Kinetics of Non-Spherical Single Feeding Particle in the Gas–Solid Separation Fluidized Bed." Separations 11, no. 12 (2024): 341. http://dx.doi.org/10.3390/separations11120341.

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Gas–solid separation fluidized bed is an efficient and clean coal separation technology with a good separation effect for coal particles. However, there is a lack of systematic research on the complex motion behavior of the feeding particles in gas–solid separation fluidized beds. In this study, the separation kinetics of non-spherical single feeding particles in the fluidized bed are examined. The particle sphericity coefficient Φ is introduced to characterize the morphology of irregular coal particles, and the drag coefficient for the feeding particles is modified to verify the suitability o

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10

Landauer, Johann, and Petra Foerst. "Influence of Particle Charge and Size Distribution on Triboelectric Separation—New Evidence Revealed by In Situ Particle Size Measurements." Processes 7, no. 6 (2019): 381. http://dx.doi.org/10.3390/pr7060381.

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Triboelectric charging is a potentially suitable tool for separating fine dry powders, but the charging process is not yet completely understood. Although physical descriptions of triboelectric charging have been proposed, these proposals generally assume the standard conditions of particles and surfaces without considering dispersity. To better understand the influence of particle charge on particle size distribution, we determined the in situ particle size in a protein–starch mixture injected into a separation chamber. The particle size distribution of the mixture was determined near the ele

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11

Sharbati, Pouya, Abdolali K. Sadaghiani, and Ali Koşar. "New Generation Dielectrophoretic-Based Microfluidic Device for Multi-Type Cell Separation." Biosensors 13, no. 4 (2023): 418. http://dx.doi.org/10.3390/bios13040418.

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This study introduces a new generation of dielectrophoretic-based microfluidic device for the precise separation of multiple particle/cell types. The device features two sets of 3D electrodes, namely cylindrical and sidewall electrodes. The main channel of the device terminates with three outlets: one in the middle for particles that sense negative dielectrophoresis force and two others at the right and left sides for particles that sense positive dielectrophoresis force. To evaluate the device performance, we used red blood cells (RBCs), T-cells, U937-MC cells, and Clostridium difficile bacte

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12

Jang, Min-Ho, Yong-Ho Choi, Heung-Joe Jung, Yong-Hoon Jeong, and Dong-Heui Kwak. "Feasibility Evaluation on Single-Collector Collision Model to Separate Microplastics in Micro Bubble Flotation Process." Journal of Korean Society of Environmental Engineers 43, no. 1 (2021): 10–19. http://dx.doi.org/10.4491/ksee.2021.43.1.10.

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Objectives:The single collector collision (SCC) model is a model that predicts the separation efficiency of particles based on the collision efficiency between microbubbles and particles in the particle separation process. In order to remove micro-plastics (MPs) particles, which have recently been known to be harmful, we tried to analyze the impact and separation efficiency of MPs based on the SCC model and evaluate its application feasibility.Methods:Based on the SCC model, the collision efficiency prediction for MPs particle removal was simulated and the separation efficiency was evaluated.

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13

Jiang, Yingqi, Jin Chen, Weipeng Xuan, et al. "Numerical Study of Particle Separation through Integrated Multi-Stage Surface Acoustic Waves and Modulated Driving Signals." Sensors 23, no. 5 (2023): 2771. http://dx.doi.org/10.3390/s23052771.

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The manipulation of biomedical particles, such as separating circulating tumor cells from blood, based on standing surface acoustic wave (SSAW) has been widely used due to its advantages of label-free approaches and good biocompatibility. However, most of the existing SSAW-based separation technologies are dedicated to isolate bioparticles in only two different sizes. It is still challenging to fractionate various particles in more than two different sizes with high efficiency and accuracy. In this work, to tackle the problems of low efficiency for multiple cell particle separation, integrated

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14

Bragg, Andrew D. "Analysis of the forward and backward in time pair-separation probability density functions for inertial particles in isotropic turbulence." Journal of Fluid Mechanics 830 (September 29, 2017): 63–92. http://dx.doi.org/10.1017/jfm.2017.586.

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In this paper we investigate, using theory and direct numerical simulations (DNS), the forward in time (FIT) and backward in time (BIT) probability density functions (PDFs) of the separation of inertial particle pairs in isotropic turbulence. In agreement with our earlier study (Bragg et al., Phys. Fluids, vol. 28, 2016, 013305), where we compared the FIT and BIT mean-square separations, we find that inertial particles separate much faster BIT than FIT, with the strength of the irreversibility depending upon the final/initial separation of the particle pair and their Stokes number $St$. Howeve

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15

Gangadhar, Anirudh, and Siva A. Vanapalli. "Inertial focusing of particles and cells in the microfluidic labyrinth device: Role of sharp turns." Biomicrofluidics 16, no. 4 (2022): 044114. http://dx.doi.org/10.1063/5.0101582.

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Inertial, size-based focusing was investigated in the microfluidic labyrinth device consisting of several U-shaped turns along with circular loops. Turns are associated with tight curvature and, therefore, induce strong Dean forces for separating particles; however, systematic studies exploring this possibility do not exist. We characterized the focusing dynamics of different-sized rigid particles, cancer cells, and white blood cells over a range of fluid Reynolds numbers [Formula: see text]. Streak widths of the focused particle streams at all the turns showed intermittent fluctuations that w

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16

Cârlescu, Petru, Ioan Tenu, Marius Baetu, and Radu Rosca. "CFD Study on must of Grapes Separation in a Hydrocyclone." Advanced Materials Research 837 (November 2013): 645–50. http://dx.doi.org/10.4028/www.scientific.net/amr.837.645.

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Abstract. Hydrocyclones are increasingly used in the food industry for various separation and purification. In this paper, an optimization was made to design a hydrocyclone model using CFD (Computational Fluid Dynamics). CFD simulation is performed with FLUENT software by coupling the Reynolds Stress Model (RSM) for must of grapes flow with Discrete Phase Model (DPM) for solid particles trajectory. Coupling of discrete phase (particles) and continuous phase (must of grapes) in the mathematical model is set so that the continuous phase to influence discrete phase. Tracking particles traiectory

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17

Kim, Moonjeong, Jemyung Cha, and Jeung Sang Go. "Ring-Shaped Baffle Effect on Separation Performance of Lithium Carbonate Micro Particles in a Centrifugal Classifier." Micromachines 11, no. 11 (2020): 980. http://dx.doi.org/10.3390/mi11110980.

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In this work, a centrifugal classifier for separating lithium carbonate particles, used as a cathode material for lithium-ion batteries, was investigated. This work numerically evaluates the internal flow and particle separation performance of the centrifugal classifier. The complex turbulent flow field in the classifier is key to understanding particle motion. A Reynolds stress model, to describe air flow field, and a discrete phase model, to track particle motion, were applied to a numerical simulation. Design parameters such as mass flow rate and rotor speed were investigated, and a ring-sh

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18

Hong, Ji Jian, Ding Yu Xi, and Wang Xue Jiao. "Numerical Simulation of Particle Separation in a Hydrocyclone." Applied Mechanics and Materials 713-715 (January 2015): 1786–89. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.1786.

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The mixture two-phase turbulence model and theory of particle dynamics is used to simulate the high concentration water-sand two-phase flow in a hydrocyclone. The article mainly analyzes the particle volumetric concentration distribution and separative efficiency of different diameter particles in a hydrocyclone. The simulation result shows that the particle volumetric concentration distribution of different diameter particles is nonuniform in a hydrocyclone. In the annular space, the small diameter particles are affected by the shortcut flow greatly and have high concentration near the wall o

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19

Puspitasari, Dewi, and Felix Theo Yusama Hutapea. "EXPERIMENTAL STUDY OF PARTICLE SIZE EFFECT ON SEPARATION EFFICIENCY OF DUAL CYCLONE SEPARATOR." Indonesian Journal of Engineering and Science 5, no. 1 (2024): 011–16. http://dx.doi.org/10.51630/ijes.v5i1.105.

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A cyclone separator is a device for separating solid particles and fluids. In this study, the performance of a cyclone separator was enhanced by adding a smaller cyclone. The objective is to separate coconut shell powder particles and determine the efficiency of the dual cyclone separator. The experiment involved varying the inlet airflow velocity to 7 m/s, 10 m/s, and 15 m/s and using different coconut shell powder particle sizes, ranging from mesh numbers 80 to 120. The results of the experiment showed that the efficiency of particle separation was significantly influenced by both the partic

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20

Ni, Chen, and Di Jiang. "Three-Dimensional Numerical Simulation of Particle Focusing and Separation in Viscoelastic Fluids." Micromachines 11, no. 10 (2020): 908. http://dx.doi.org/10.3390/mi11100908.

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Particle focusing and separation using viscoelastic microfluidic technology have attracted lots of attention in many applications. In this paper, a three-dimensional lattice Boltzmann method (LBM) coupled with the immersed boundary method (IBM) is employed to study the focusing and separation of particles in viscoelastic fluid. In this method, the viscoelastic fluid is simulated by the LBM with two sets of distribution functions and the fluid–particle interaction is calculated by the IBM. The performance of particle focusing under different microchannel aspect ratios (AR) is explored and the f

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21

Cieśla, Antoni, Wojciech Kraszewski, Mikołaj Skowron, Agnieszka Surowiak, and Przemysław Syrek. "Application of electrodynamic drum separator to electronic wastes separation." Gospodarka Surowcami Mineralnymi 32, no. 1 (2016): 155–74. http://dx.doi.org/10.1515/gospo-2016-0007.

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AbstractStatic electric fields are used, among others, in technological processes such as electric separation. Electrodynamic separation is a process of separating two or more solid phases of various physical properties by electric field forces. The advantage of electrodynamic separation is possibility of obtaining separation of individual components in dry conditions. This eliminates many operations such as thickening, dewatering, hydrotransportation, additional drying which cause higher energy consumption and higher separation process costs. Efficiency of beneficiation depends on many factor

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22

Sachs, Sebastian, Jörg König, and Christian Cierpka. "Multidimensional Particle Separation by Tilted-Angle Standing Surface Acoustic Waves—Physics, Control, and Design." Powders 4, no. 1 (2025): 2. https://doi.org/10.3390/powders4010002.

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Lab-on-a-Chip devices based on tilted-angle standing surface acoustic waves (tasSAWs) emerged as a promising technology for multidimensional particle separation, highly selective in particle size and acoustic contrast factor. For this active separation method, a tailored acoustic field is used to focus and separate particles on stationary pressure nodes by means of the acoustic radiation force. However, additional non-linear acoustofluidic phenomena, such as the acoustically induced fluid flow or dielectrophoretic effects, are superimposed on the separation process. To obtain a particle separa

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23

Zhang, Yuekan, Meng Yang, Lanyue Jiang, Hui Wang, Jinguang Xu, and Junru Yang. "High Concentration Fine Particle Separation Performance in Hydrocyclones." Minerals 11, no. 3 (2021): 307. http://dx.doi.org/10.3390/min11030307.

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The vast majority of current research on hydrocyclone field centrifugal separation focuses on low concentration fluids having volume fraction less than 3%. For high-concentration fluids having volume fractions greater than 10%, which are often encountered in engineering, the law governing particle motion and the classification mechanism are still unclear. In order to gain insights into the interaction between fine particles in the high concentration hydrocyclone field and to improve the hydrocyclone separation performance of these particles, a Dense Discrete Phase Model (DDPM) of the Euler-Eul

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Vigneswaran, Shyaamkrishnan, Jihyeon Yun, Kyu-Dong Jeong, Moon-Sup Lee, and Soon-Jae Lee. "Effect of Crumb Rubber Modifier Particle Size on Storage Stability of Rubberized Binders." Sustainability 15, no. 18 (2023): 13568. http://dx.doi.org/10.3390/su151813568.

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This research study aimed to assess the influence of different particle sizes of crumb rubber modifier on phase separation when mixed with virgin asphalt binder (PG 64-22). Both Superpave and multiple stress creep recovery (MSCR) tests were conducted to determine the optimal particle size. Three sizes of crumb-rubber particles (≤0.5 mm, ≤1 mm, and 1–2 mm) were individually incorporated into the binder at a weight proportion of 10%. The findings revealed that an increase in particle size resulted in higher viscosity, which reduced workability. However, the use of particles with a size of ≤0.5 m

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Yu, Chi, Runhui Geng, and Xinwen Wang. "A Numerical Study of Separation Performance of Vibrating Flip-Flow Screens for Cohesive Particles." Minerals 11, no. 6 (2021): 631. http://dx.doi.org/10.3390/min11060631.

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Vibrating flip-flow screens (VFFS) are widely used to separate high-viscosity and fine materials. The most remarkable characteristic is that the vibration intensity of the screen frame is only 2–3 g (g represents the gravitational acceleration), while the vibration intensity of the screen surface can reach 30–50 g. This effectively solves the problem of the blocking screen aperture in the screening process of moist particles. In this paper, the approximate state of motion of the sieve mat is realized by setting the discrete rigid motion at multiple points on the elastic sieve mat of the VFFS.

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26

Yanai, Takuma, Takatomo Ouchi, Masumi Yamada, and Minoru Seki. "Hydrodynamic Microparticle Separation Mechanism Using Three-Dimensional Flow Profiles in Dual-Depth and Asymmetric Lattice-Shaped Microchannel Networks." Micromachines 10, no. 6 (2019): 425. http://dx.doi.org/10.3390/mi10060425.

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We herein propose a new hydrodynamic mechanism of particle separation using dual-depth, lattice-patterned asymmetric microchannel networks. This mechanism utilizes three-dimensional (3D) laminar flow profiles formed at intersections of lattice channels. Large particles, primarily flowing near the bottom surface, frequently enter the shallower channels (separation channels), whereas smaller particles flowing near the microchannel ceiling primarily flow along the deeper channels (main channels). Consequently, size-based continuous particle separation was achieved in the lateral direction in the

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Wang, Xin, Yuhong Liu, Jinchi Zhao, Yujing Zhou, and Fei Wang. "Numerical Simulation of an Oil Mist Particle Emission and Gas–Oil Separation Device of a Closed Machine Tool in the Post-Environmental Area." International Journal of Environmental Research and Public Health 19, no. 24 (2022): 16415. http://dx.doi.org/10.3390/ijerph192416415.

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Owing to the airflow field within airtight machines, oil mist particles escape with the airflow from the machine shell gaps and are emitted externally to the post-environmental area, causing air pollution and threatening workers’ health. The existing local exhaust system is ineffective in capturing oil mist particles. This study proposes a gas–oil separation device that can “in-situ control” the oil mist particles in situ and weaken their outgoing emission and that uses numerical simulations to compare and analyse the emission characteristics of oil mist particles, before and after the additio

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28

Ljunggren, M., and L. Jönsson. "Separation characteristics in dissolved air flotation - pilot and full-scale demonstration." Water Science and Technology 48, no. 3 (2003): 89–96. http://dx.doi.org/10.2166/wst.2003.0169.

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This study presents practical implications for particle separation in Dissolved Air Flotation (DAF). The objectives were to localise where particles are separated from the water phase and to determine what particles, in terms of size, are removed by the DAF-process. Both pilot- and full-scale plants were investigated. Particle sizes were analysed with a light-blocking particle counter and an optical borescope was used for visualisation of particle-bubble aggregates. It was found that particles are preferably separated upstream in the process, i.e. close to the contact zone. Furthermore, separa

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Chen, Fulin, Yu Gao, Dongfang Lu, Zhenqiang Liu, and Yan Zhao. "Study on the Application of a Reflux Classifier in the Classification of Ultrafine Ilmenite." Minerals 13, no. 3 (2023): 304. http://dx.doi.org/10.3390/min13030304.

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Mineral classification is an important preparation operation in the process of beneficiation. The classification effect directly affects the production capacity of grinding machines, product quality, subsequent separation of the concentrate grade, and recovery. To improve mineral classification accuracy and provide technical ideas for enriching the separation of fine materials, this paper proposes the use of a trapezoidal inclined channel agitated reflux classifier (TARC) to classify ultra-fine ilmenite. The principle of this separating system is based on a hindered settling effect and fluidiz

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Wassberg, Therese R., Mathilde L. Witt, Murat Serhatlioglu, Christian F. Nielsen, Ian D. Hickson, and Anders Kristensen. "Size-based chromosome separation in a microfluidic particle separation device using viscoelastic fluids." EPJ Web of Conferences 266 (2022): 12007. http://dx.doi.org/10.1051/epjconf/202226612007.

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Viscoelastic flow-based particle manipulation techniques enable bio-particle focusing, separation, and enrichment by precisely tuning the rheological parameters, flow conditions, and microchannel geometry. In this study, we fabricated a PDMS-based single inlet/outlet microchannel to separate bio-particles by their size ranging from 1-10 μm. Flow conditions and rheological properties are optimized using 2 μm and 4 μm Polystyrene beads to reach the best particle separation condition. We demonstrated the size-based separation of human chromosomes by separating 1-2 μm size small chromosomes from 8

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Sygusch, Johanna, Thomas Wilhelm, Orkun Furat, Kai Bachmann, Volker Schmidt, and Martin Rudolph. "Application of Multivariate Tromp Functions for Evaluating the Joint Impact of Particle Size, Shape and Wettability on the Separation of Ultrafine Particles via Flotation." Powders 3, no. 3 (2024): 338–66. http://dx.doi.org/10.3390/powders3030020.

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Froth flotation predominantly separates particles according to their differences in wettability. However, other particle properties such as size, shape or density significantly influence the separation outcome as well. Froth flotation is most efficient for particles within a size range of about 20–200 μm, but challenges arise for very fine or coarse particles that are accompanied by low recoveries and poor selectivity. While the impact of particle size on the separation behavior in flotation is well known by now, the effect of particle shape is less studied and varies based on the investigated

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Zhou, Yuanye, Tianlong See, Shan Zhong, Zhu Liu, and Lin Li. "A massive reduction of dust particle adhesion in a cyclone by the introduction of a wedge." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 17 (2017): 3102–14. http://dx.doi.org/10.1177/0954406217728978.

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Particle adhesion in a cyclone, such as a cyclonic vacuum cleaner, can significantly reduce its efficiency. An investigation is presented here on the particle adhesion in a cyclone from a vacuum cleaner that consists of a primary separation stage (a cylindrical chamber) and a secondary separation stage (14 cyclones). The flow direction in the primary separation stage was modified by the use of a wedge of 40 mm × 40 mm × 6 mm at the inlet of the primary separation stage, which affected the particle trajectory in the primary separation stage and the particle inlet position in the cyclone while k

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Lagereva, E.A. "MODELING OF CHANGES IN PARTICLE SIZE DISTRIBUTION OF SOLIDS IN MULTISTAGE SEPARATION SYSTEMS." Nauchno-tekhnicheskiy vestnik Bryanskogo gosudarstvennogo universiteta 2, no. 3 (2018): 99–106. https://doi.org/10.5281/zenodo.1198781.

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The presented method of calculation of the separation of solid particles from gas streams to multistage separation systems, consisting of a number of sequentially installed separational devices of various design and principle of operation. It is based on a separate analysis of the sequential processes of capture and transmission of individual fractions of solid particles of a polydisperse structure. The technique provides information about changes in particle size distribution of solids with the passage of the gas flow in the treatment system and allows you to specifically select the effective

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Dezhkam, Rasool, Hoseyn A. Amiri, David J. Collins, and Morteza Miansari. "Continuous Submicron Particle Separation via Vortex-Enhanced Ionic Concentration Polarization: A Numerical Investigation." Micromachines 13, no. 12 (2022): 2203. http://dx.doi.org/10.3390/mi13122203.

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Separation and isolation of suspended submicron particles is fundamental to a wide range of applications, including desalination, chemical processing, and medical diagnostics. Ion concentration polarization (ICP), an electrokinetic phenomenon in micro-nano interfaces, has gained attention due to its unique ability to manipulate molecules or particles in suspension and solution. Less well understood, though, is the ability of this phenomenon to generate circulatory fluid flow, and how this enables and enhances continuous particle capture. Here, we perform a comprehensive study of a low-voltage

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Wullenweber, Maike S., Jonathan Kottmeier, Ingo Kampen, Andreas Dietzel, and Arno Kwade. "Numerical Study on High Throughput and High Solid Particle Separation in Deterministic Lateral Displacement Microarrays." Processes 11, no. 8 (2023): 2438. http://dx.doi.org/10.3390/pr11082438.

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Deterministic lateral displacement (DLD) is a high-resolution passive microfluidic separation method for separating micron-scale particles according to their size. Optimizing these microsystems for larger throughputs and particle concentrations is of interest for industrial applications. This study evaluates the limitations of the functionality of the DLD separation principle under these specific conditions. For this reason, different particle volume fractions (up to 11%) and volumetric flow rates (corresponding to Reynolds numbers up to 50) were varied within the DLD microsystem and tested in

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You, Y., and A. K. Bertram. "Effects of molecular weight and temperature on liquid–liquid phase separation in particles containing organic species and inorganic salts." Atmospheric Chemistry and Physics 15, no. 3 (2015): 1351–65. http://dx.doi.org/10.5194/acp-15-1351-2015.

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Abstract. Atmospheric particles containing organic species and inorganic salts may undergo liquid–liquid phase separation when the relative humidity varies between high and low values. To better understand the parameters that affect liquid–liquid phase separation in atmospheric particles, we studied the effects of molecular weight and temperature on liquid–liquid phase separation in particles containing one organic species mixed with either ammonium sulfate or ammonium bisulfate. In the molecular-weight-dependent studies, we measured liquid–liquid phase separation relative humidity (SRH) in pa

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Yin, Danfen, Xiaoling Zhang, Xianwei Han, Jun Yang, and Ning Hu. "Multi-Stage Particle Separation based on Microstructure Filtration and Dielectrophoresis." Micromachines 10, no. 2 (2019): 103. http://dx.doi.org/10.3390/mi10020103.

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Particle separation is important in chemical and biomedical analysis. Among all particle separation approaches, microstructure filtration which based particles size difference has turned into one of the most commonly methods. By controlling the movement of particles, dielectrophoresis has also been widely adopted in particle separation. This work presents a microfluidic device which combines the advantages of microfilters and dielectrophoresis to separate micro-particles and cells. A three-dimensional (3D) model was developed to calculate the distributions of the electric field gradient at the

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Surowiak, Agnieszka, Tomasz Gawenda, Agata Stempkowska, Tomasz Niedoba, and Alona Nad. "The Influence of Selected Properties of Particles in the Jigging Process of Aggregates on an Example of Chalcedonite." Minerals 10, no. 7 (2020): 600. http://dx.doi.org/10.3390/min10070600.

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The influence of the physical, geometric and chemical properties of particles on the results of aggregate separation by means of a laboratory ring jig is presented in this paper. The experiment was based on separation of chalcedonite particles in a narrow particle size fraction composed separately of regular and irregular particles, which was prepared in accordance with patent inventions. On its basis, the geometric properties—projection diameter and (volumetric and dynamic) shape coefficients—as well as physical properties—particle density—were determined in products of the regular and irregu

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Kudi, A. N., N. A. Fedosov, V. V. Sergeev, V. N. Dolgunin, and A. G. Tarakanov. "The Solution of the Problem of Separating a Mixture of Polydisperse Particles of Different Shapes." Vestnik Tambovskogo gosudarstvennogo tehnicheskogo universiteta 26, no. 4 (2020): 609–18. http://dx.doi.org/10.17277/vestnik.2020.04.pp.609-618.

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A technology is proposed for the separation of particles by shape in a polydisperse granular material using the effects of particle interaction in a fast shear flow on a rough slope. The technology involves the fractionation of the initial mixture by the volume of particles using the segregation effect at the first stage and the calibration of the obtained particle fractions by weight using the effect of quasi-diffusion separation (migration) in the gravity flow at the second. The final stage involves the separation of particles by shape by sieve classification of fractions according to a key

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Liu, Xiaoyan, Hua Cheng, Hanqing Chen, Longhui Guo, Yu Fang, and Xuesong Wang. "Theoretical Study on Freezing Separation Pressure of Clay Particles with Surface Charge Action." Crystals 12, no. 9 (2022): 1304. http://dx.doi.org/10.3390/cryst12091304.

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This study aimed to clarify the mechanism of the effect of surface charge of clay particles on the separation pressure between adjacent frozen clay particles. A general mathematical model of separation pressure between adjacent spherical clay particles was given based on the extended colloidal stability (DLVO) theory; it was introduced into the frost heave process, and the functional expression of separation pressure and freezing temperature between clay particles was derived by using the relationship between the pore throat’s radius and freezing temperature, which was verified by the existing

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BEC, J., L. BIFERALE, A. S. LANOTTE, A. SCAGLIARINI, and F. TOSCHI. "Turbulent pair dispersion of inertial particles." Journal of Fluid Mechanics 645 (February 9, 2010): 497–528. http://dx.doi.org/10.1017/s0022112009992783.

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The relative dispersion of pairs of inertial point particles in incompressible, homogeneous and isotropic three-dimensional turbulence is studied by means of direct numerical simulations at two values of the Taylor-scale Reynolds number Reλ ~ 200 and Reλ ~ 400, corresponding to resolutions of 5123 and 20483 grid points, respectively. The evolution of both heavy and light particle pairs is analysed by varying the particle Stokes number and the fluid-to-particle density ratio. For particles much heavier than the fluid, the range of available Stokes numbers is St ∈ [0.1 : 70], while for light par

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Walter, Lindsay P., and Mathieu Francoeur. "Orientation effects on near-field radiative heat transfer between complex-shaped dielectric particles." Applied Physics Letters 121, no. 18 (2022): 182206. http://dx.doi.org/10.1063/5.0116828.

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The effect of orientation on near-field radiative heat transfer between two complex-shaped superellipsoid particles of SiO2 is presented. The particles under study are 50 nm in radius and of variable concavity. Orientation is characterized by the degree of rotational symmetry in the two-particle systems, and the radiative conductance is calculated using the discrete system Green's function approach to account for all electromagnetic interactions. The results reveal that the total conductance in some orientations can be up to twice that of other orientations when particles are at a center-of-ma

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Jiang, L. Y., M. Benner, and J. Bird. "Assessment of Scavenge Efficiency for a Helicopter Particle Separation System." Journal of the American Helicopter Society 57, no. 2 (2012): 41–48. http://dx.doi.org/10.4050/jahs.57.022007.

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The effectiveness of a helicopter particle separation system has been numerically assessed at practical operating conditions and sand environments for various scenarios. The particle separation mechanism and its limitations are revealed by the predicted flow field characteristics and particle trajectories. The separation-by-inertia concept is effective for removing large particles, but problematic for small particles of diameter ≤36 μm for the configuration and operating conditions considered in the present study. It is also found that particle size, shape factor, and rebound characteristics e

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Leistner, Tom, Michael Türk, Alfred Weber, Christian Weber, and Urs A. Peuker. "Selective Separation Using Fluid-Liquid Interfaces." Materials Science Forum 959 (June 2019): 113–24. http://dx.doi.org/10.4028/www.scientific.net/msf.959.113.

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Interfaces between two fluid phases are a potential barrier for particles. Certain particles may not be able to pass such an interface, because they have to overcome a certain resistance. The latter depends on the strength of the interface, which is the surface tension. The second relevant property is the three phase wetting angle, which shows the fluid with the preferred wetting to the particle surface. It depends on the particle properties, like chemical composition, surface structure and surface modification. The third relevant parameter is the particle size. From these three main influence

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Park, In-soon, En-soo Na, Dong-soon Jang, and Youngsoo Paek. "Efficiency Analysis of Spiral Structured Twist Screen." Food Engineering Progress 14, no. 2 (2010): 85–91. http://dx.doi.org/10.13050/foodengprog.2010.14.2.85.

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In the food process, twist screen is widely used to divide particles on the basis of size. As screen equipped in the twist screen perfoms an important part in the particle size distribution mechanism, the contact area of screen and particles, retention time of particles on the screen, mesh and string thickness of screen and the flow pattern of particles on the screen are major points of the separation efficiency. To improve the separation efficiency, increase the retention time and control the flow pattern of particles, screen frame dam and spiral blockage are installed on the sieve of twist s

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Weber, Sabrina, Orkun Furat, Tom Kirstein, Thomas Leißner, Urs A. Peuker, and Volker Schmidt. "Computational Workflow for the Characterization of Size, Shape, and Composition of Particles and Their Separation Behavior During Processing." Powders 4, no. 1 (2024): 1. https://doi.org/10.3390/powders4010001.

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Separation functions, so-called Tromp functions, are often used to quantitatively analyze the separation behavior in particle processing with respect to individual particle descriptors. However, since the separation behavior of particles is typically influenced by multiple particle descriptors, multivariate Tromp functions are required. This study focuses on methods that allow for the computation of multivariate parametric Tromp functions by means of statistical image analysis and copula-based modeling. The computations are exemplarily performed for the magnetic separation of Li-bearing minera

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Zeng, Lin, Xi Chen, Rongrong Zhang, et al. "High-Resolution Separation of Nanoparticles Using a Negative Magnetophoretic Microfluidic System." Micromachines 13, no. 3 (2022): 377. http://dx.doi.org/10.3390/mi13030377.

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The separation and purification of a sample of interest is essential for subsequent detection and analysis procedures, but there is a lack of effective separation methods with which to purify nano-sized particles from the sample media. In this paper, a microfluidic system based on negative magnetophoresis is presented for the high-resolution separation of nanoparticles. The system includes on-chip magnetic pole arrays and permalloys that symmetrically distribute on both sides of the separation channel and four permanent magnets that provide strong magnetic fields. The microfluidic system can s

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Womac, Alvin C., Sarah E. Klasek, Daniel Yoder, and Doug G. Hayes. "Terminal Velocity of Corn Stover Stem Fractions." Journal of the ASABE 66, no. 2 (2023): 497–506. http://dx.doi.org/10.13031/ja.15340.

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Highlights Terminal velocity was measured for small, standardized sizes of corn stover stem fractions with a vertical wind tunnel built to aerodynamically suspend particles. Mean terminal velocity ranged from 2.84 m s-1 to 7.74 m s-1 for dry pith-internode and wet rind-node fractions, respectively. Anticipated separation of corn stover stem particles using terminal velocity differences was viable for dry (11% w.b.) particles of pith, rind, node, and internode. But, many wet (43% w.b.) fractions had similar terminal velocities, thereby reducing separation propensity. Abstract. Terminal velocity

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İNCE COŞKUN, Alev Emine. "Phase separation behavior of whey protein isolate particle dispersions in the presence of xanthan." TURKISH JOURNAL OF CHEMISTRY 44, no. 5 (2020): 1314–26. http://dx.doi.org/10.3906/kim-2004-57.

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In this study, phase separation of colloidal whey protein isolate (WPI) particle dispersions was studied using a rod-like polysaccharide xanthan. Effects of different xanthan concentration, particle volume fraction, and temperature were analyzed by visual observations, turbidity measurements, and particle mobility tracking method. Particle mobility was determined using a diffusing wave spectroscopy (DWS) set up. Xanthan concentration was kept low in order not to increase the viscosity of dispersions, so that the phase separation could be observed easily. Visual observations showed that there w

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Gregory, John. "The Role of Colloid Interactions in Solid-Liquid Separation." Water Science and Technology 27, no. 10 (1993): 1–17. http://dx.doi.org/10.2166/wst.1993.0195.

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Forces between particles in water become especially important when the particles are in the colloidal size range (less than a few mm). To a first approximation inter-particle forces or colloid interactions are linearly dependent on particle size and they become stronger, relative to external forces, as particle size decreases. The separation of fine particles from water by processes such as coagulation, filtration and flotation can be crucially dependent on the manipulation of colloid interactions, usually to promote attachment of particles to each other or to surfaces. The most important type

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