Fig. A.1.

Example of steady-state temperature distribution u(x) with heat conduction. Blue and red curves: plate of size π 0.6 m with step-like radiative forcing; ξ = 0.27 m and 0.39 m, respectively. Turquoise and orange: same ξ values, but sinusoidal forcing around pipe-shaped truss of diameter d = s/π = 0.6 m. The transition region of the blue curve has the width Δx = 0.55 m.
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