Confirming Convection: Heat Escape Through Unlidded Containers

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SUMMARY

Heat escape from unlidded containers primarily occurs through convection, as hot air is less dense than cold air and rises. While conduction and radiation contribute to heat loss, their impact is minimal compared to convection. The discussion confirms that convection is the dominant mechanism for heat transfer in this scenario, with radiation only becoming significant at extremely high temperatures.

PREREQUISITES
  • Understanding of thermodynamics principles, specifically heat transfer mechanisms.
  • Familiarity with the concepts of convection, conduction, and radiation.
  • Basic knowledge of density and its relation to temperature in gases.
  • Awareness of the conditions under which radiation becomes significant.
NEXT STEPS
  • Research the principles of convection in fluid dynamics.
  • Explore the role of conduction and radiation in heat transfer.
  • Study the effects of temperature on gas density and behavior.
  • Investigate practical applications of convection in engineering and design.
USEFUL FOR

Students of thermodynamics, engineers in heat transfer applications, and anyone interested in understanding the mechanisms of heat loss in various systems.

gem0688
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Hi,

Just a quick question, I just want to check that i am on the right lines!

When heat escapes through the top of a container which does not have a lid, is that due to convection? i/e hot air is less dense than cold air, so rises.

Cheers

o:) Gemma o:)
 
Physics news on Phys.org
Out of conduction, convection and radiation, you are correct that convection would account for the majority of the heat loss. There will be a little due to IR radiation, but that won't account for much unless the interior of the container is red hot.
 
Cheers,

just wanted 2 make sure! :biggrin:

o:) Gemma o:)
 

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