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Pipe Flowrate Measurement01:28

Pipe Flowrate Measurement

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In pipe flow measurement, orifice, nozzle, and Venturi meters are commonly used to determine fluid flowrates by constricting the flow area, which increases fluid velocity and reduces pressure. This pressure difference, governed by Bernoulli's principle and adjusted for real-world conditions, is essential for calculating flowrate. Each meter type is suited to specific applications based on accuracy, efficiency, and compatibility with various flow conditions.
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Equivalent Capacitance01:19

Equivalent Capacitance

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Multiple capacitors can be connected in a circuit in series or parallel configuration. When the capacitor combination is connected to a battery, the potential drop across each capacitor and the magnitude of charge stored in the individual capacitor depends on the type of the connection. The capacitor combination is replaced by a single equivalent capacitor that stores the same amount of charge as the combination for a given potential difference.
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Equivalent Capacitance01:19

Equivalent Capacitance

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From the study of resistive circuits, it is understood that employing a series-parallel combination serves as an effective strategy for simplifying circuits. Capacitors can be arranged within a circuit in one of two ways: a series configuration or a parallel configuration. The way these capacitors are connected to a battery will influence both the potential drop across each individual capacitor and the size of the charge that each capacitor can store. This is determined by the specific type of...
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Pipe Flowrate Measurement: Problem Solving01:28

Pipe Flowrate Measurement: Problem Solving

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A spray tank system is engineered to uniformly distribute a pest-control liquid across plants by using a pressurized mechanism. The tank, pressurized to 150 kPa, holds the pesticide at a height of 0.80 meters. Liquid flows from the tank through a 1.9 meter pipe with a diameter of 0.015 meters, angled at 0.698 radians, ultimately reaching a 0.007 meter nozzle that sprays the pesticide. Accurate calculation of the system's flow rate is crucial to ensure uniform application, and this is achieved...
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Capacitance: Single-Phase And Three-Phase Line01:25

Capacitance: Single-Phase And Three-Phase Line

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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...
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Plane Potential Flows01:23

Plane Potential Flows

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Plane potential flows simplify fluid motion by assuming the fluid to be irrotational and incompressible. These characteristics allow these flows to be described by a velocity potential function, ϕ, representing the flow speed in a given direction, and a stream function, ψ, that visualizes the flow path, both governed by Laplace's equation. These parameters help in estimating flow patterns, velocity distributions, and pressure fields around various hydraulic structures.
Uniform...
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Related Experiment Video

Updated: Nov 10, 2025

High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition
05:11

High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition

Published on: June 27, 2025

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Plug Regime Flow Velocity Measurement Problem Based on Correlability Notion and Twin Plane Electrical Capacitance

Volodymyr Mosorov1, Grzegorz Rybak1, Dominik Sankowski1

  • 1Institute of Applied Computer Science, Lodz University of Technology, 90-537 Łódź, Poland.

Sensors (Basel, Switzerland)
|April 3, 2021
PubMed
Summary
This summary is machine-generated.

This study addresses flow velocity measurement limitations using electrical capacitance tomography, especially in irregular flow regimes. An improved algorithm enhances signal pattern extraction for accurate velocity calculations.

Keywords:
correlabilityelectrical capacitance tomographymultiphase flowpattern

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Area of Science:

  • Process Engineering
  • Fluid Dynamics
  • Measurement Science

Background:

  • Flow velocity measurement is crucial in industrial processes.
  • Electrical Capacitance Tomography (ECT) with cross-correlation is a common technique.
  • The plug flow regime presents challenges for traditional cross-correlation methods.

Purpose of the Study:

  • To evaluate an original algorithm for automatic signal pattern extraction in ECT.
  • To improve the accuracy of flow velocity measurements, particularly in irregular flow regimes.
  • To provide practical guidance on algorithm parameter selection for reliable measurements.

Main Methods:

  • Twin-plane sensor electrical capacitance tomography (ECT).
  • Cross-correlation method for velocity estimation.
  • Development and application of an automatic signal pattern extraction algorithm.

Main Results:

  • The proposed algorithm effectively extracts suitable signal patterns for velocity calculation.
  • The technique's efficiency was demonstrated, especially for challenging plug flow regimes.
  • Parameter selection significantly influences the accuracy of plug identification and flow velocity determination.

Conclusions:

  • The developed algorithm enhances the reliability of ECT-based flow velocity measurements.
  • It offers a practical solution for overcoming limitations in irregular flow conditions.
  • Optimized parameter selection is key to achieving accurate results in material flow analysis.