Thermosuperrepellency of a hot substrate caused by vapour percolation

Abstract Drop rebound after collision with a very hot substrate is usually attributed to the Leidenfrost effect, characterized by intensive film boiling in thin vapour gap between liquid and substrate. Similarly, drop impact onto cold superhydrophobic leads complete rebound, despite partial wetting of Here we study repellent properties smooth hydrophilic substrates nucleate boiling, non-Leidenfrost regime discover that thermally induced repellency associated percolation on The structure presence percolating rivulets analogous Cassie-Baxter mode, which necessary condition for isothermal case. theoretical predictions threshold temperature agree well experimental data correspond minimum heat flux when spray cooling.