Numerical framework for the thermal simulations and post-processing pipeline. (a) The flux boundary conditions imposed while setting up the thermal simulations. The heat source and sink particles are shown in red and blue, respectively. Panels (b) and (c) show the same assembly in thermal equilibrium, with the color bar representing the equilibrium temperature of the particles. The three highlighted segments of the assembly in panel (c) are layers as described in Section 2.4. The entire assembly is sectioned into layers, but we only show three here for clarity.