# Thermal Diffusivity of a Sphere

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This Demonstration describes a method for determining the thermal diffusivity of a sphere. The sphere is suddenly immersed in a cooling fluid and the temperature of the fluid is observed as a function of time.

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Contributed by: Clay Gruesbeck (September 2016)

Open content licensed under CC BY-NC-SA

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References

[1] R. B. Bird, W. E. Stewart and E. N. Lightfoot, *Transport Phenomena*, rev. 2nd ed., New York:* *John Wiley & Sons, Inc., 2007.

[2] H. S. Carlslaw and J. C. Jaeger, *Conduction of Heat in Solids*, 2nd ed., Oxford: Clarendon Press, 1959.

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