Characteristic time of thermal and diffusional relaxation

O. Aryasova, Ya. Khazan


It is shown that frequently used dimensional estimation of a layer thermal relaxation time, tr, as L2/κ based on the layer thickness, L, and thermal diffusivity, κ, strongly overestimates tr. The correct estimate tr=L22κ should contain a factor of 1/π2 which is of the order of 0.1.


characteristic time; thermal relaxation

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