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Related Concept Videos

Mechanism of heat transfer01:19

Mechanism of heat transfer

Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
Mechanisms of Heat Transfer01:14

Mechanisms of Heat Transfer

Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant heat.
Mechanisms of Heat Transfer II01:20

Mechanisms of Heat Transfer II

In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
Mechanisms of Heat Transfer I01:14

Mechanisms of Heat Transfer I

Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
Temperature Measurement Sites01:14

Temperature Measurement Sites

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...
Quantifying Heat02:46

Quantifying Heat

Thermal Energy Microscopically, thermal energy is the kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold”, which depends on the amount of thermal energy. When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE) (or higher thermal energy), and the object is perceived as “hot”, or it is described as being at a higher temperature. When the atoms and...

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Related Experiment Video

Updated: Jul 9, 2026

Wind Tunnel Experiments to Study Chaparral Crown Fires
09:27

Wind Tunnel Experiments to Study Chaparral Crown Fires

Published on: November 14, 2017

Wildfire fuel heat transfer sensor.

Ginny A Marshall1,2, Rodman R Linn3, Dan K Thompson4

  • 1Northern Forestry Centre, Natural Resources Canada, Edmonton, T6H 3S5, Canada. ginny.marshall@nrcan-rncan.gc.ca.

Scientific Reports
|July 7, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a low-cost heat transfer sensor to measure wildfire dynamics. Coupled with a fine-wire thermocouple, it accurately captures radiative and convective heat transfer, improving wildfire spread understanding.

Keywords:
ConvectionHeat transferRadiationSensorWildfire

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Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames
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Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames

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Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data
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Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data

Published on: December 12, 2013

Related Experiment Videos

Last Updated: Jul 9, 2026

Wind Tunnel Experiments to Study Chaparral Crown Fires
09:27

Wind Tunnel Experiments to Study Chaparral Crown Fires

Published on: November 14, 2017

Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames
10:29

Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames

Published on: June 1, 2016

Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data
09:55

Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data

Published on: December 12, 2013

Area of Science:

  • Environmental Science
  • Fire Science
  • Engineering

Background:

  • Wildfire spread is driven by complex energy exchange between atmosphere, fire, and fuels.
  • Radiation and convection are dominant heat transfer mechanisms, but their relative contributions are poorly understood due to measurement challenges.
  • Accurate measurement of heat transfer is crucial for predicting wildfire behavior.

Purpose of the Study:

  • To develop and validate a low-cost, deployable sensor and model for measuring heat transfer in wildfire environments.
  • To improve the understanding of radiative and convective heat transfer dynamics during wildfire spread.
  • To provide a tool for field and laboratory measurements of heat transfer relevant to fire science.

Main Methods:

  • Designed a heat transfer sensor using stainless steel thermocouple probes of varying emissivity, mimicking fine fuel elements.
  • Coupled the probes with a fine-wire thermocouple to enhance sensitivity for dynamic heat transfer measurements.
  • Validated the sensor and model through field tests in high-intensity crown fires and laboratory experiments.

Main Results:

  • Individual stainless steel probes were insufficient for resolving highly dynamic heat transfer.
  • Coupling probes with a fine-wire thermocouple significantly improved measurement sensitivity.
  • The sensor and model demonstrated capability in measuring realistic convective and radiative heat transfer compared to existing literature.

Conclusions:

  • The developed sensor and model offer a viable method for measuring heat transfer in extreme fire environments.
  • Further investigation and validation are necessary to address identified limitations and expand applicability.
  • This technology has the potential to enhance wildfire modeling and management strategies.