Convection: Forced Convection

Observe how forced convection can change an object’s surface temperature and cool it down rapidly.

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Convection refers to transfer of heat by a fluid material (such as air or water) moving from one place to another. The convection is forced if the fluid motion is caused by a fan or a pump while natural convection is the result of density differences.

A simple fan presents a question: why do we feel cooler if cool air is moving across our skin, even though the air itself is the same temperature as the still air? The answer lies in the fact that the layer of air next to our skin forms a thin blanket of still air that conducts heat slowly. If the still air is stripped away by wind, the “blanket” is removed and the skin is directly exposed to the air temperature. This model compares moving air and still air around a hot object.

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► NGSS

► NSES Standards

► AAAS (2008) Standards

Copyright
© Copyright The Concord Consortium

Record Link
<a href="">The Concord Consortium. Convection: Forced Convection. Concord: The Concord Consortium, 2015, March 18.</a>

AIP
Convection: Forced Convection (The Concord Consortium, Concord, 2015, March 18), WWW Document, (https://concord.org/).

AJP
Convection: Forced Convection (The Concord Consortium, Concord, 2015, March 18), WWW Document, (https://concord.org/).

APA
Convection: Forced Convection. (2015, March 18). Retrieved 2017, August 24, from The Concord Consortium: https://concord.org/

Disclaimer: The Concord Consortium offers citation styles as a guide only. We cannot offer interpretations about citations as this is an automated procedure.

Requirements

This activity runs entirely in a Web browser. Preferred browsers are: Google Chrome (versions 30 and above), Safari (versions 7 and above), Firefox (version 30 and above), Internet Explorer (version 10 or higher), and Microsoft's Edge.

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Engineering Energy EfficiencyThis resource is a part of the Concord Consortium's Engineering Energy Efficiency project.

Grade Level
Middle School, High School
Subject
Engineering, Physics
Focus Area
Modeling and Simulation
Rating
0
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