Extended Data Fig. 5: Schematic showing the temperature measurement.
From: Inhibiting the Leidenfrost effect above 1,000 °C for sustained thermal cooling
The thermocouple is inserted in the steel block at a distance δs ≈ 1 mm below the pillar tops. The ratio between the conduction thermal resistance and the convective thermal resistance of steel, defined as the Biot number Bi = δshs/ks (where hs ≈ 2*103 W/m2K is the convection heat transfer coefficient and ks ≈ 25 W/mK is the thermal conductivity of steel), is 0.07 << 1. This suggests that the temperature at the top surface is comparable to that measured with the thermocouple.
