Publication detail

Dielectrophoretic classification of fibres: principles and application to glass fibres suspended in air

LÍZAL, F. MALÝ, M. ELCNER, J. FARKAS, Á. PECH, O. MIŠÍK, O. JEDELSKÝ, J. JÍCHA, M.

Original Title

Dielectrophoretic classification of fibres: principles and application to glass fibres suspended in air

English Title

Dielectrophoretic classification of fibres: principles and application to glass fibres suspended in air

Type

conference paper

Language

en

Original Abstract

Particles exposed to an electric field experience forces that influence their movement. This effect can be used for filtration of air, or for size classification of aerosols. The motion of charged particles in a non-uniform electric field is called electrophoresis. Two processes are involved in this phenomenon: 1) charging of particles and 2) electrical mobility separation. If fibres are exposed to electrophoresis, they are separated on the basis of two parameters: diameter and length. Regrettably, as naturally occurring fibres are polydisperse both in diameter and length, the electrophoresis is not very efficient in length classification. In contrast, dielectrophoresis is the motion of electrically neutral particles in a non-uniform electric field due to the induced charge separation within the particles. As deposition velocity of fibres induced by dielectrophoretic force strongly depends on length and only weakly on diameter, it can be used for efficient length classification. Principles of length classification of conducting and non-conducting fibres are presented together with design of a fibre classifier. Lastly, images of motion of fibres recorded by high-speed camera are depicted.

English abstract

Particles exposed to an electric field experience forces that influence their movement. This effect can be used for filtration of air, or for size classification of aerosols. The motion of charged particles in a non-uniform electric field is called electrophoresis. Two processes are involved in this phenomenon: 1) charging of particles and 2) electrical mobility separation. If fibres are exposed to electrophoresis, they are separated on the basis of two parameters: diameter and length. Regrettably, as naturally occurring fibres are polydisperse both in diameter and length, the electrophoresis is not very efficient in length classification. In contrast, dielectrophoresis is the motion of electrically neutral particles in a non-uniform electric field due to the induced charge separation within the particles. As deposition velocity of fibres induced by dielectrophoretic force strongly depends on length and only weakly on diameter, it can be used for efficient length classification. Principles of length classification of conducting and non-conducting fibres are presented together with design of a fibre classifier. Lastly, images of motion of fibres recorded by high-speed camera are depicted.

Keywords

Fibres, Aerosols, Classification, Visualization

Released

13.11.2018

Publisher

E D P SCIENCES

Pages from

1

Pages to

4

Pages count

4

URL

BibTex


@inproceedings{BUT152118,
  author="František {Lízal} and Milan {Malý} and Jakub {Elcner} and Árpád {Farkas} and Ondřej {Pech} and Ondrej {Mišík} and Jan {Jedelský} and Miroslav {Jícha}",
  title="Dielectrophoretic classification of fibres: principles and application to glass fibres suspended in air",
  annote="Particles exposed to an electric field experience forces that influence their movement. This effect
can be used for filtration of air, or for size classification of aerosols. The motion of charged particles in a non-uniform electric field is called electrophoresis. Two processes are involved in this phenomenon: 1) charging of particles and 2) electrical mobility separation. If fibres are exposed to electrophoresis, they are separated on the basis of two parameters: diameter and length. Regrettably, as naturally occurring fibres are polydisperse both in diameter and length, the electrophoresis is not very efficient in length classification. In contrast, dielectrophoresis is the motion of electrically neutral particles in a non-uniform electric field due to the induced charge separation within the particles. As deposition velocity of fibres induced by dielectrophoretic force strongly depends on length and only weakly on diameter, it can be used for efficient length classification. 
Principles of length classification of conducting and non-conducting fibres are presented together with design of a fibre classifier. Lastly, images of motion of fibres recorded by high-speed camera are depicted.",
  address="E D P SCIENCES",
  booktitle="EPJ Web of Conferences",
  chapter="152118",
  howpublished="online",
  institution="E D P SCIENCES",
  number="UNSP 02053",
  year="2018",
  month="november",
  pages="1--4",
  publisher="E D P SCIENCES",
  type="conference paper"
}