This is an example of modeling anisotropic heat conduction in an orthotropic material where a heated solid bar suddenly is cooled by submerging it in a cool fluid. The material features different thermal conductivities in the x and y-directions which is accounted for by modifying the diffusion term in the heat transfer equation. Instead of solving the usual isotropic case
we will instead solve the following
where
The following material and simulation parameters are given; initial
temperature T0 = 260 °C, density ρ =
6407.4 kg/m3, heat capacity
This model is available as an automated tutorial by selecting Model Examples and Tutorials… > Heat Transfer > Orthotropic Heat Conduction from the File menu. Or alternatively, follow the linked step-by-step instructions.

Reference
[1] P.J. Schneider, Conduction Heat Transfer, Addison-Wesley, 2nd Ed., Ex. 10-7, pp. 261, 1957.