Supplementary Material

Names of animation files for step response Details of residence time distribution model including, additional data for Pe = 0.03 simulation, and the calculation of reactor volume from the residence time distribution Derivation of expressions relating heat transfer variables to literature values of accommodation coefficient and thermal conductivity (Eqs. 11 and 12 from the main text) Derivation of the model used for heat transfer from the filament Derivation of the model used for the effective temperature, including the definition of the effective temperature, derivation of the equation for measuring effective temperature and the reactor effective temperature model