A numerical method for the analysis of polydisperse aerosol particles charging in a coaxial electrode system

Alisoy, H.Z.; Alagoz, Serkan; Alisoy, G.H.; Alagöz, Barış Baykant

doi:10.1016/j.elstat.2011.11.004

Cited by 8 publications

(6 citation statements)

References 19 publications

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“…The effective thickness of positive ion cover is an important parameter in the application of aerosol particle charging in that positive charging of particles by ion precipitation takes place effectively in this distance [29,30] . Fig.…”

Section: Theoretical Motion Analysis Of Ion Flows In Electrode Gapsmentioning

confidence: 99%

An Investigation of Ionic Flows in a Sphere-Plate Electrode Gap

Alisoy¹,

Alagoz²,

Alisoy³

et al. 2013

Plasma Sci. Technol.

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This paper presents analyses of ion flow characteristics and ion discharge pulses in a sphere-ground plate electrode system. As a result of variation in electric field intensity in the electrode gap, the ion flows towards electrodes generate non-uniform discharging pulses. Inspection of these pulses provides useful information on ionic stream kinetics, the effective thickness of ion cover around electrodes, and the timing of ion clouds discharge pulse sequences. A finite difference time domain (FDTD) based space-charge motion simulation is used for the numerical analysis of the spatio-temporal development of ionic flows following the first Townsend avalanche, and the simulation results demonstrate expansion of the positive ion flow and compression of the negative ion flow, which results in non-uniform discharge pulse characteristics.

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Section: Theoretical Motion Analysis Of Ion Flows In Electrode Gapsmentioning

confidence: 99%

An Investigation of Ionic Flows in a Sphere-Plate Electrode Gap

Alisoy¹,

Alagoz²,

Alisoy³

et al. 2013

Plasma Sci. Technol.

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“…Therefore, developing chargers that can efficiently work with highly concentrated aerosols is challenging. This article investigates the diffusion mechanism involved in the charging (15,16) of Ag nanoparticles with sizes ranging from 20 to 160 nm and at a high concentration of 10 6 -10 8 cm -3 (17). To charge particles, a needle-plate charger is utilized to create a unipolar ion cloud through DC corona discharge, resulting in the movement of ions towards the particle surface to transfer charge.…”

Section: Introductionmentioning

confidence: 99%

“…To charge particles, a needle-plate charger is utilized to create a unipolar ion cloud through DC corona discharge, resulting in the movement of ions towards the particle surface to transfer charge. Various wire and needle corona ionizer designs for particle charging have been detailed in published works (14,16,(18)(19)(20). Improving the charger's efficiency has multiple benefits, including reducing material consumption, especially when using costly materials like in printing.…”

Section: Introductionmentioning

confidence: 99%

Efficient Charging of Aerosol Nanoparticles by Corona-needle Charger with Improved Design for Printing of Metallic Microstructures

Efimov,

Patarashvili,

Kornyushin

et al. 2024

IJE

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Aerosol particle charging is widely used in various technical applications. A model of a needle-plate type charger for efficient charging of aerosol nanoparticles in a corona plasma discharge has been developed and investigated. The main difference from similar devices in the modernization of the grounded plate hole's geometry and the number of corona needles exist. This has resulted in a substantial increase in the charger's efficiency by over 25%. The effects of two types of discharge plates, one with cylindrical and the other with conical inner holes, on the extrinsic charging efficiency of aerosol particles were experimentally investigated. Metallic nanoparticles of Ag with sizes ranging from 20 to 160 nm and a number concentration of 10 6 to 10 8 cm -3 were utilized as the test aerosol. This system shows that the maximum efficiency of particle charging is attained by using a plate with a conical hole, which reduces electrostatic losses from 37±3% to 20±2%. Furthermore, an additional effect of increasing the particle charging efficiency was also observed by using a multi-pointed needle, which resulted in lower electrostatic losses compared to a single needle. Experimental evidence confirms that utilizing a conical hole in the plate and a multi-pointed needle has increased the particle charging efficiency from 47±3% to 59±4%, as opposed to the standard design featuring a cylindrical hole and a single-pointed needle. In this paper, an increase in the efficiency of charging particles in a charger with a multi-pointed needle compared to a single-pointed one is shown for the first time.

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“…Numerical methods most commonly used for field characterization are based on the Mie [28,37,38] or the finite element theories, and the finite difference timedomain techniques. Finite element analysis (FEA) is adopted to simulate generated electric fields in this research, utilising COMSOL v4.3a.…”

Section: Methodsmentioning

confidence: 99%

Multiple-Cylindrical Electrode System for Rotational Electric Field Generation in Particle Rotation Applications

Benhal

Chase

Gaynor

et al. 2015

International Journal of Advanced Robotic Systems

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Lab-on-a-chip micro-devices utilizing electric fieldmediated particle movement provide advantages over current cell rotation techniques due to the flexibility in configuring micro-electrodes. Recent technological advances in micro-milling, three-dimensional (3D) printing and photolithography have facilitated fabrication of complex micro-electrode shapes. Using the finite-element method to simulate and optimize electric field induced particle movement systems can save time and cost by simplifying the analysis of electric fields within complex 3D structures. Here we investigated different 3D electrode structures to obtain and analyse rotational electric field vectors. Finiteelement analysis was conducted by an electric current stationary solver based on charge relaxation theory. Highresolution data were obtained for three-, four-, six-and eight-cylindrical electrode arrangements to characterize the rotational fields. The results show that increasing the number of electrodes within a fixed circular boundary provides larger regions of constant amplitude rotational electric field. This is a very important finding in practice, as larger rotational regions with constant electric field amplitude make placement of cells into these regions, where cell rotation occurs, a simple task -enhancing flexibility in cell manipulation. Rotation of biological particles over the extended region would be useful for biotechnology applications which require guiding cells to a desired location, such as automation of nuclear transfer cloning.

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A numerical method for the analysis of polydisperse aerosol particles charging in a coaxial electrode system

Cited by 8 publications

References 19 publications

An Investigation of Ionic Flows in a Sphere-Plate Electrode Gap

An Investigation of Ionic Flows in a Sphere-Plate Electrode Gap

Efficient Charging of Aerosol Nanoparticles by Corona-needle Charger with Improved Design for Printing of Metallic Microstructures

Multiple-Cylindrical Electrode System for Rotational Electric Field Generation in Particle Rotation Applications

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