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Related Concept Videos

Temperature Measurement Sites01:14

Temperature Measurement Sites

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A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
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Measurement of Fluid Pressure01:16

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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.
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Steady Flow of a Fluid Stream01:27

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Consider a control volume, such as a pipe with solid boundaries, through which fluid flows and changes direction due to the impulse exerted by the resulting force from the pipe walls. In steady flow, the mass of fluid entering the control volume at a given time, t, with velocity v1, is equal to the mass leaving after infinitesimal time dt, with velocity v2.
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Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
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Methods of Documentation IV: Focus Charting01:26

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Focus Charting, also known as the focus charting system or "focus documentation," is a systematic documentation approach used in healthcare to organize patient information in medical records.
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Visualization of Ambient Mass Spectrometry with the Use of Schlieren Photography
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Temperature Measurement of Fluid Flows by Using a Focusing Schlieren Method.

A Martínez-González1,2, D Moreno-Hernández3, J A Guerrero-Viramontes4

  • 1Depto. de Ingeniería Robótica, Universidad Politécnica del Bicentenario, Carr. Silao-Romita Km 2, San Juan de los Duran, C.P. 36283 Silao, Guanajuato, Mexico. amartinezg@upbicentenario.edu.mx.

Sensors (Basel, Switzerland)
|December 23, 2018
PubMed
Summary

This study introduces a novel focusing schlieren technique to measure temperature fields in fluid flows. The method accurately maps thermal distributions, validated by thermocouple measurements.

Keywords:
focusing schlierenmeasurementstemperature

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Area of Science:

  • Fluid dynamics
  • Optical metrology
  • Heat transfer

Background:

  • Accurate measurement of temperature fields in fluid flows is crucial for understanding complex phenomena.
  • Traditional methods may have limitations in spatial resolution or invasiveness.
  • Optical techniques offer non-intrusive alternatives for thermal field mapping.

Purpose of the Study:

  • To develop and validate a focusing schlieren technique for measuring planar temperature fields.
  • To apply the technique to analyze the thermal characteristics of hot air exiting a nozzle.
  • To assess the accuracy of the proposed method against established temperature measurement tools.

Main Methods:

  • Utilizing a focusing schlieren technique with off-axis circular illumination to enhance optical system depth of focus.
  • Implementing a calibration procedure correlating pixel intensity in schlieren images to cutoff grid positions.
  • Applying the calibrated system to measure temperature fields of hot air from a 10 mm nozzle.

Main Results:

  • The focusing schlieren method successfully measured planar temperature fields of hot air.
  • Temperature distributions were mapped at various radial positions and temperature settings.
  • Experimental results demonstrated strong agreement with thermocouple measurements.

Conclusions:

  • The developed focusing schlieren technique provides a viable and accurate method for planar temperature field measurement.
  • This optical approach offers a valuable tool for fluid flow thermal analysis.
  • The technique's accuracy is confirmed, making it suitable for applications like hot air gun analysis.