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Mechanisms of Heat Transfer II

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...

Temperature and Thermal Equilibrium

Temperature and Thermal Equilibrium

Heat and temperature are essential concepts for everyone every day. The study of heat and temperature is part of an area of physics known as thermodynamics. It is not always easy to distinguish heat and temperature.
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...

Mechanisms of Heat Transfer I

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.

Enthalpy

Enthalpy

Chemists ordinarily use a property known as enthalpy (H) to describe the thermodynamics of chemical and physical processes. Enthalpy is defined as the sum of a system’s internal energy (E) and the mathematical product of its pressure (P) and volume (V):

Mechanism of heat transfer

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...

Joule-Thomson Effect

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The Joule-Thomson effect, also known as the Joule-Kelvin effect, describes the temperature change of a fluid when it is forced through a valve or porous plug while keeping it in a thermally insulated environment. This experiment is called a throttling process. This is an important effect widely used in refrigeration and the liquefaction of gases.
This experiment forces high-pressure gas through a throttle valve or a porous plug to a lower-pressure region. The gas expands as it passes through to...

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Related Experiment Video

Updated: Feb 22, 2026

Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System

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Published on: August 7, 2018

Thermal Effects.

Dong Xu, Panyue Zhang, Jie Ye

Water Environment Research : a Research Publication of the Water Environment Federation

|September 29, 2017

Summary

This review summarizes 2016 research on thermal effects for water pollution control, covering biological nitrogen removal, organic pollutant degradation, resource recovery, and microbial communities.

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Last Updated: Feb 22, 2026

Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System

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Published on: August 7, 2018

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Characterization of Thermal Transport in One-dimensional Solid Materials

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Published on: January 26, 2014

Area of Science:

Environmental Science
Water Treatment Technologies
Applied Microbiology

Background:

Thermal effects are increasingly studied for optimizing water pollution control processes.
Understanding these effects is crucial for developing efficient and sustainable treatment methods.
Recent advancements in 2016 have highlighted novel applications of thermal processes.

Purpose of the Study:

To review and synthesize research published in 2016 concerning thermal effects in water pollution control.
To identify key findings and trends in the application of thermal processes across various treatment stages.
To provide a comprehensive overview of the current state of knowledge in this field.

Main Methods:

Systematic literature review of research published in 2016.
Categorization of studies based on five key areas: biological nitrogen removal, organic pollutant degradation, resource recovery, pretreatment, and microbial community analysis.
Synthesis of findings related to thermal influences on treatment efficiency and microbial behavior.

Main Results:

Significant advancements were noted in utilizing thermal effects for enhanced biological nitrogen removal.
Thermal pretreatment demonstrated improved organic pollutant degradation and resource recovery efficiency.
Studies revealed the impact of thermal conditions on microbial community structure and function in wastewater treatment systems.

Conclusions:

Thermal effects play a critical role in various water pollution control processes, offering significant potential for optimization.
Further research is warranted to fully elucidate the mechanisms and applications of thermal processes for sustainable water management.
The integration of thermal strategies alongside microbial processes shows promise for future water treatment innovations.