Bioburden Sterilization: Cold-Spot Thermal Gradient (2D)

This 2D companion to the 3D dry-heat sterilization simulator drives the same D-value/z-value first-order thermal-death kinetics, but drops the 3D sim's assumption of one uniform chamber temperature. Instead, every point on the panel gets its own local temperature from a radial cold-spot gradient — corners and edges run cooler than the center, exactly the unevenness real bake-out ovens have and that planetary-protection sterilization sign-off has to account for. Each location's D-value, and therefore its log-reduction, is computed locally and independently; the live readouts separate the population-average bioburden from the cold corner's, because it is the slowest-sterilizing spot — not the average — that determines whether a real bake-out actually meets the limit. Drag to pan and scroll to zoom over the spore field to inspect the gradient directly.