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Chapter 8. Thermal conductivity and themechanisms of energy transport

• Fourier’s law of heat conduction

• Thermal conductivity and the influencing factors

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Mechanisms of energy transport

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Thermal conductivity

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Thermal diffusivity

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Temperature andpressure dependence

of thermal

conductivity

Reduced thermal

conductivity as a

function of reduced temperature and 

 pressure

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Theory of thermal conductivity of gases at

low density

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Theory of thermal conductivity of gases atlow density

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Convective transport of energy

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Convective transport of energy

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Convective energy flux vector

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Comparison betweenmomentum and heat transport

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Work associated with molecular motions

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Work done by the fluid

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Combined energy flux vector

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Combined energy flux vector