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Related Concept Videos

Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
Doppler Effect - II01:05

Doppler Effect - II

The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...
Measurement of Fluid Pressure01:16

Measurement of Fluid Pressure

Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
Assessing Blood pressure using a doppler ultrasound01:19

Assessing Blood pressure using a doppler ultrasound

To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
Doppler Effect - I00:56

Doppler Effect - I

The Doppler effect and Doppler shift were named after the Austrian physicist and mathematician Christian Johann Doppler in 1842, who conducted experiments with both moving sources and moving observers. Consider an observer standing on a street corner, observing an ambulance with a siren sound passing by at a constant speed. The observer experiences two characteristic changes in the sound of the siren. Initially, the sound increases in loudness as the ambulance approaches and decreases in...
Pipe Flowrate Measurement01:28

Pipe Flowrate Measurement

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.
The orifice meter is a simple,...

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Related Experiment Video

Updated: Jun 15, 2026

Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods
09:17

Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods

Published on: April 23, 2018

Laser Doppler anemometry measurements in an engine.

J B Cole, M D Swords

    Applied Optics
    |March 10, 2010
    PubMed
    Summary

    A new laser Doppler anemometry technique measures internal combustion engine cylinder flow fields with high resolution. This photon counting method is robust, even with poor signal-to-noise ratios, making it suitable for firing engines.

    Area of Science:

    • Fluid dynamics
    • Optical measurement techniques
    • Internal combustion engines

    Background:

    • Accurate measurement of in-cylinder flow fields is crucial for understanding and optimizing internal combustion engine performance.
    • Traditional measurement techniques often lack the required spatial and temporal resolution or are incompatible with engine operating conditions.

    Purpose of the Study:

    • To present a simple, effective, and robust technique for measuring the flow field within the cylinder of a motored internal combustion engine.
    • To demonstrate the capability of the technique for high-resolution flow field measurements.

    Main Methods:

    • Utilized a real-fringe laser Doppler anemometer (LDA) system.
    • Employed photon counting digital autocorrelation for data acquisition.

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    Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
    08:54

    Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

    Published on: February 13, 2018

    Related Experiment Videos

    Last Updated: Jun 15, 2026

    Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods
    09:17

    Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods

    Published on: April 23, 2018

    Laser Doppler: A Tool for Measuring Pancreatic Islet Microvascular Vasomotion In Vivo
    10:39

    Laser Doppler: A Tool for Measuring Pancreatic Islet Microvascular Vasomotion In Vivo

    Published on: March 8, 2018

    Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
    08:54

    Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

    Published on: February 13, 2018

  • Processed autocorrelation functions via Gaussian velocity profile curve-fitting and direct Fourier transformation.

    • Main Results:

    • Achieved good temporal and spatial resolution in measuring the flow field.
    • Demonstrated the technique's ability to process data effectively using both curve-fitting and direct Fourier transformation methods.
    • The method proved tolerant to poor signal-to-noise ratios (SNRs).

    Conclusions:

    • The developed laser Doppler anemometry technique offers a viable solution for high-resolution in-cylinder flow field measurements.
    • Its robustness against poor SNRs suggests suitability for application in firing internal combustion engines, advancing engine research and development.