Understanding Conduction and the Heat Equation

Watch the bonus video on thermal resistance here: nebula.tv/videos/the-efficien...
Continuing the heat transfer series, in this video we take a look at conduction and the heat equation.
Fourier's law is used to calculate the rate at which heat is transferred through an object due to conduction. But it can only be applied if the temperature distribution within the body is known. To determine the temperature distribution, the heat equation needs to be solved.
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[@TheEfficientEngineer]

Thanks for watching - let me know what you think! And don't forget to check out the companion video on thermal resistance by signing up for the Nebula - nebula.tv/videos/the-efficient-engineer-understanding-thermal-resistance.

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2nd derivative is of course just the rate of change of a rate of change. Physically, the easiest example is the acceleration which is the rate of change of the velocity. Of course velocity is rate of change of position hence acceleration is 2nd derivative of position vs time.

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[@probinsiyanongenhiyero7358]

PLEASE UPLOAD MORE ABOUT HEAT TRANSFER. GIVE SPECIFIC FORMULAS FOR REFLECTED, ABSORBED AND TRANSMITTED HEAT ENERGY. NEEDED FOR THESIS. THANKS A LOT. I WILL RECOMMEND YOUR VIDEOS TO MY CLASSMATES.

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14:00 What do you mean by steady state case? I don’t understand why you would leave out the inverse alpha because surely it still makes a difference what material we are using no?

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The temperature is not changing over time because it is in steady state. This means that the term “dT/dt” is equal to zero, which removes the whole term.

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Only one addition. At minute 12:20 you explain thermal diffusivity. You say that heat travels faster thorugh a material with higher diffusivity. However, if i understand correctly, temperature travels faster with higher diffusivity not heat. Besides that, loved the vid!

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