Thermal Conductivity

Path: Main menu > Material > New polymer… Tab: Thermodynamic Data



Path: Main menu > Material > Edit material (file)… Tab: Thermodynamic Data

Figure: Dialog box Thermodynamic data

In the case of thermal conductivity, it is necessary to distinguish between steady-state and non-steady-state temperature fields. With steady-state temperature fields, only the thermal conductivity l is available as a material value. This is temperature-dependent and higher for semi-crystalline materials than for amorphous ones, see figure.

Thermal conductivity: $\lambda(T) = \lambda_0 + \lambda_m \cdot T$

Figure: Thermal conductivity as a function of temperature

The value $\lambda_0$ which has to be entered represents the value obtained from the straight line that describes the molten range at 0 degrees. The gradient for the thermal conductivity can also be negative and must then be entered with a negative sign. The effective thermal conductivity of the solid is required for the melting calculation. For purposes of determining this value, it is necessary to enter the thermal conductivity of the solid. The melting point $T_{k,g}$ must also be entered on this mask. In the case of semi-crystalline materials, this temperature is interpreted as the crystalline melting point $T_k$ and in the case of amorphous polymers, as the glass transition point $T_g$ .