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Thread: heat flow

  1. #1 heat flow 
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    Jan 2018
    for heat equation to predict heat flow is gravity considered as a part of heat or as part of the medium .

    example heat flow in a gas that's heavier than air.
    will flow of heat get affected by gravity, or just the gas will flow with effects of gravity and heat will just follow changing shape of gas.

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  3. #2  
    Bullshit Intolerant PhDemon's Avatar
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    Feb 2013
    Newcastle-upon-Tyne, UK
    Gravity has a negligible effect in this problem, it is so small it can be safely ignored and doesn't appear in the equations. The gas density, temperature and diffusion coefficients are needed but gravity is irrelevant.

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