Heat transference is defined as the method in which heat is travels from one object to another. Heat always moves from hot to cold. During class, we concurred that energy can never be created or destroyed, but only transferred. Though we have been studying this subject for many weeks, practical uses are still something that we do not grasp completely. A very ubiquitous form of heat transference is convection. Convection is heat transfer resulted by the up and down movement of gases and liquids. Convection occurs in the presence of heat, because hot air expands and becomes less dense, thus making it rise. Though this sounds like a simple process, convection is essential for humans and the rest of the planet.
As humans learned more about convection, it helped clarify many mysteries. Convection causes convection currents, because as hot air rises, the cold air descends. This can also happen in water. A convection current in a liquid is called circulation. If water is heated above a flame, the hot water would expand and float to the top, while the cooler and dense water from the surface descends to the bottom. Understanding this enabled humans to understand different things in the environment such as marine animal migration. Some ocean-based animals change their location based on the ocean currents, which is largely affected by the heat from the sun that causes the ocean create many currents through convection.
Also, convection is thought to play an important role in the transfer of energy between the center and surface of the sun. It also is the reason for the movement of magma beneath the surface of the earth. Some other examples of convection are: wind currents, hot air balloons, and the difference of temperature through a multi-storied building. While convection is a simple process, it affects the environment in countless ways. Infatuation
Bibliography:
"Heat Transfer." ChEE & Cooking. Web. 06 Nov. 2011.
"Heat Transfer." Web. 06 Nov. 2011.
"Heat Transfer: Conduction, Convection, Radiation." Welcome to Wisc-Online.com. Web. 06 Nov. 2011.
Bryan, Julia, and Joshua. "How Do Ocean Currents Affect Migration Patterns of Sea Animals? Have Currents Been Changing in Ways That Are Bad for the Animals?"Oswalt Academy. Web. 06 Nov. 2011.
Scholorly Sources:
"Handbook of Heat Transfer Applications (2nd Edition)." SAO/NASA ADS: ADS Home Page. Web. 06 Nov. 2011.
De Vahl Davis, G. "Natural Convection of Air in a Square Cavity: A Bench Mark Numerical Solution - De Vahl Davis - 2005 - International Journal for Numerical Methods in Fluids." Wiley Online Library. Web. 06 Nov. 2011.
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