Area Thermal Expansion Coefficient

Written by Jerry Ratzlaff on . Posted in Thermodynamics

Area thermal expansion coefficient, abbreviated as \(\alpha_a\) (Greek symbol alpha), also known as coefficient of aerial thermal expansion, is the ratio of the change in size of a material to its change in temperature.

 

Area Thermal Expansion Coefficient FORMULA

\(\large{ \alpha_a  =  \frac { 1 }{ A } \; \frac {\Delta A } {\Delta T}   }\)  

Where:

 Units English Metric
\(\large{ \alpha_a }\)   (Greek symbol alpha) = area thermal expansion coefficient \(\large{ \frac{in^2}{in^2\;F} }\) \(\large{ \frac{mm^2}{mm^2\;C} }\)
\(\large{ A }\) = area of the object \(\large{in^2}\) \(\large{mm^2}\)
\(\large{ \Delta A }\) = area differential \(\large{in^2}\) \(\large{mm^2}\)
\(\large{ \Delta T }\) = temperature differential \(\large{F}\) \(\large{C}\)

 

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Tags: Thermal Equations Expansion Equations