Lesson plan

Thermal diffusion

Thermal diffusion may refer to: * A thermal force on a gas due to a temperature gradient, also called thermal diffusion or Thermal transpiration. ** It is used to drive a gas pump with no moving parts called a Knudsen pump. ** It is the currently accepted theory for the rotation of the Crookes radiometer. * Diffusion in a temperature gradient, also called thermodiffusion or thermophoresis. ** It can be used as an obsolete method of making enriched uranium (see enriched uranium § thermal diffusion). ** Thermal diffusion can be used to measure fluid flow, including perfusion and rCBF at one location over time. * Brownian motion (at a constant non-zero absolute temperature). See also: * Molecular diffusion * Heat conduction (i.e., diffusion of heat)

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Article summary

Thermal diffusion may refer to: * A thermal force on a gas due to a temperature gradient, also called thermal diffusion or Thermal transpiration. ** It is used to drive a gas pump with no moving parts called a Knudsen pump. ** It is the currently accepted theory for the rotation of the Crookes radiometer. * Diffusion in a temperature gradient, also called thermodiffusion or thermophoresis. ** It can be used as an obsolete method of making enriched uranium (see enriched uranium § thermal diffusion). ** Thermal diffusion can be used to measure fluid flow, including perfusion and rCBF at one location over time. * Brownian motion (at a constant non-zero absolute temperature). See also: * Molecular diffusion * Heat conduction (i.e., diffusion of heat)

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