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Related Concept Videos

Computed Tomography01:10

Computed Tomography

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
Capacitance: Single-Phase And Three-Phase Line01:25

Capacitance: Single-Phase And Three-Phase Line

In electrical power systems, understanding the capacitance of transmission lines is fundamental for efficient operation.
Single-Phase Lines
Consider a single-phase, two-wire transmission line with equal phase spacing energized by a voltage source. One conductor carries a uniform positive charge, while the other carries an equal negative charge. The capacitance C of the line can be derived from the voltage V between the conductors. For a one-meter section of the line, the capacitance is given...
Capacitors and Capacitance01:18

Capacitors and Capacitance

A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
Spherical and Cylindrical Capacitor01:26

Spherical and Cylindrical Capacitor

A spherical capacitor consists of two concentric conducting spherical shells of radii R1 (inner shell) and R2 (outer shell). The shells have equal and opposite charges of +Q and −Q, respectively. For an isolated conducting spherical capacitor, the radius of the outer shell can be considered to be infinite.
Conventionally, considering the symmetry, the electric field between the concentric shells of a spherical capacitor is directed radially outward. The magnitude of the field, calculated by...
Capacitors01:15

Capacitors

Capacitors play a crucial role in car radios, where they filter and store frequencies to ensure clear signal reception. Essentially serving as energy storage devices, capacitors store energy within their electric field and are composed of two parallel conducting plates separated by a dielectric.
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...

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Related Experiment Video

Updated: May 25, 2026

Array Tomography Workflow for the Targeted Acquisition of Volume Information using Scanning Electron Microscopy
09:47

Array Tomography Workflow for the Targeted Acquisition of Volume Information using Scanning Electron Microscopy

Published on: July 15, 2021

Electrical capacitance volume tomography: design and applications.

Fei Wang1, Qussai Marashdeh, Liang-Shih Fan

  • 1William G. Lowrie Department of Chemical and Biomolecular Engineering, Ohio State University, 140 West 19th Avenue, Columbus, OH 43210, USA. wangf@chbmeng.ohio-state.edu

Sensors (Basel, Switzerland)
|February 2, 2012
PubMed
Summary
This summary is machine-generated.

Electrical Capacitance Volume Tomography (ECVT) offers real-time 3D imaging for multi-phase flows. Recent advances focus on sensor design and applications, proving its industrial and research utility.

Keywords:
ECTECVTcapacitance sensorelectrical capacitance volume tomographymulti-phase flownon-intrusive testingprocess imaging

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Area of Science:

  • * Advanced imaging technologies
  • * Non-intrusive measurement techniques
  • * Multi-phase flow analysis

Background:

  • * Electrical Capacitance Volume Tomography (ECVT) evolved from 2D Electrical Capacitance Tomography (ECT).
  • * ECVT provides non-intrusive, real-time 3D imaging of process domains.
  • * Capacitance measurements from external electrodes reconstruct internal images.

Purpose of the Study:

  • * To review recent progress in ECVT sensor design.
  • * To highlight ECVT applications in multi-phase flow.
  • * To demonstrate ECVT's capability and validity through case studies.

Main Methods:

  • * Review of 3D capacitance sensor design elements: shape, electrode configuration, and number.
  • * Illustration of sensor applications across various vessel sizes (1-60 inches) and complex geometries.
  • * Presentation of case studies validating ECVT performance.

Main Results:

  • * ECVT sensors are adaptable to diverse vessel sizes and complex industrial geometries.
  • * Case studies confirm ECVT's ability to provide qualitative and quantitative 3D data.
  • * Demonstrated real-time imaging capabilities for dynamic multi-phase flow phenomena.

Conclusions:

  • * ECVT is a powerful tool for industrial applications and fundamental multi-phase flow research.
  • * Advances in sensor design enhance ECVT's applicability and accuracy.
  • * The technology offers significant advantages for visualizing and analyzing complex flow systems.