Theory for Heat Transfer in Solids
The Heat Transfer in Solids Interface solves for the following equation derived from Equation 4-15:
(4-16)
The different quantities involved here are recalled below:
ρ is the density (SI unit: kg/m3)
Cp is the specific heat capacity at constant stress (SI unit: J/(kg·K))
T is the absolute temperature (SI unit: K)
utrans is the velocity vector of translational motion (SI unit: m/s)
q is the heat flux by conduction (SI unit: W/m2)
qr is the heat flux by radiation (SI unit: W/m2)
α is the coefficient of thermal expansion (SI unit: 1/K)
S is the second Piola-Kirchhoff stress tensor (SI unit: Pa)
Q contains additional heat sources (SI unit: W/m3)
For a steady-state problem the temperature does not change with time and the terms with time derivatives disappear.
The first term on the right-hand side of Equation 4-16 is the thermoelastic damping and accounts for thermoelastic effects in solids:
(4-17)
It should be noted that the d ⁄ dt operator is the material derivative, as described in the Time Derivative subsection of Material and Spatial Frames.