Thermal Expansion - Superficial i.e. Area
Superficial i.e area temperature expansion - online calculator
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The amount by which unit area of a material increases when the temperature is raised by one degree is called the coefficient of superficial (i.e. area) expansion. Superficial thermal expansion can be expressed as
dA = A0 γ (t1 - t0) (1)
where
dA = change in area (m2)
A0 = initial area (m2)
γ = superficial expansion coefficient (m2/m2K)
t0 = initial temperature (oC)
t1 = final temperature (oC)
Online Superficial Thermal Expansion Calculator
In general the superficial temperature coefficients can be approximated to
γ ~= 2 α
where
α = linear temperature expansion coefficient (m/m K, m/m oC)
Linear Temperature Coefficients - α - of some common metals
- aluminum : 0.000023 (m/m oC)
- steel: 0.000016 (m/m oC)
- copper: 0.000017 (m/m oC)
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