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Related Concept Videos

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Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
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In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
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Related Experiment Video

Updated: Nov 26, 2025

Wind Tunnel Experiments to Study Chaparral Crown Fires
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Garnering understanding into complex firebrand generation processes from large outdoor fires using simplistic

Sayaka Suzuki1, Samuel L Manzello2

  • 1National Research Institute of Fire and Disaster (NRIFD), 4-35-3, Jindaiji Higashimachi, Chofu, Tokyo, Japan.

Fuel (London, England)
|December 11, 2020
PubMed
Summary

This study developed a simple lab method to analyze firebrand generation from building materials. Wind speed significantly impacts firebrand production, offering insights into real-world fire spread in urban and wildland-urban interface fires.

Keywords:
firebrandfirebrand generationlarge outdoor fires and the built environmentstructure firebrandsurban fireswildland-urban interface (WUI) fires

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Area of Science:

  • Fire Science
  • Combustion Research
  • Structural Engineering

Background:

  • Firebrands are a major cause of fire spread, especially in wildland-urban interface (WUI) fires.
  • Understanding firebrand generation is crucial for developing effective fire mitigation strategies.
  • Current knowledge on firebrand generation from structural materials under varying wind conditions is limited.

Purpose of the Study:

  • To develop a simple laboratory-scale experimental method for studying firebrand generation.
  • To investigate the effect of wind speed on firebrand generation from structural materials.
  • To provide insights into firebrand generation relevant to full-scale structures and WUI fires.

Main Methods:

  • Developed a simple laboratory-scale experimental setup.
  • Utilized Japanese wind facilities to control and vary wind speeds.
  • Tested mock-ups of full-scale roofing assemblies using structural materials.

Main Results:

  • The experimental method successfully yielded insights into firebrand generation processes.
  • Wind speed was identified as a key factor influencing firebrand generation.
  • The findings contribute to understanding firebrand behavior in both structural and WUI fire scenarios.

Conclusions:

  • A simple laboratory method can effectively study firebrand generation.
  • Wind speed significantly affects firebrand production from structural materials.
  • This research enhances understanding of fire spread mechanisms in complex fire environments.