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@wikipedia

Synonym
Fourier number (Fo) = Dimensionless Fourier time (tD)

qwe
Dimensionless quantity characterising transient (time dependant) Heat Transfer:

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anchorFo
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\mbox{Fo}  = t_D = \frac{a \cdot t}{L^2}

where

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bodyt

Heat Transfer transient time

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bodya

Thermal Diffusivity 

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bodyL

Characteristic length of Heat Transfer


See also

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Physics / Thermodynamics / Heat Transfer

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