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I am studying heat transfer And understanding the vacuum flask example that involves conduction, convection, and radiation

Do you know other example that involves these 3 phases?

we can name some by category:

CONDUCTION:

  • Touching a stove and being burned
  • Ice cooling down your hand
  • Boiling water by thrusting a red-hot piece of iron into it

CONVECTION:

  • Hot air rising, cooling, and falling (convection currents)
  • An old-fashioned radiator (creates a convection cell in a room by emitting warm air at the top and drawing in cool air at the bottom).

RADIATION:

  • Heat from the sun warming your face
  • Heat from a lightbulb
  • Heat from a fire
  • Heat from anything else which is warmer than its surroundings.

but what example involves all of them?

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What are you asking here? Nearly every "real world system" involves all three. Usually radiation has the least impact for systems we deal with day-to-day but it still matters. –  Brandon Enright Apr 27 '13 at 4:49
    
could you name a system that involves these 3 phases?. I was thinking in how earth is heated by sun with conduction, convection, & radiation –  cMinor Apr 27 '13 at 4:53
    
The earth is heated by the sun through radiation. How is there conduction between the Earth and the Sun? –  Mew Apr 27 '13 at 8:40
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1 Answer

up vote 1 down vote accepted

A good example would be heating a tin can of water using a Bunsen burner. Initially the flame produces radiation which heats the tin can. The tin can then transfers heat to the water through conduction. The hot water then rises to the top, in the convection process.

The atmosphere would be another example. The atmosphere is heated by radiation from the Sun, the atmosphere exhibits convection as hot air near the equator rises producing winds, and finally there is conduction between air molecules, and small amounts of air-land conduction.

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protected by Qmechanic Aug 27 '13 at 6:54

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