In the present study, the critical heat flux (CHF) mechanism in pool boiling of water is experimentally investigated. The experiments are performed using an infrared (IR) camera to measure the temperature and heat flux distributions on the boiling sur...
In the present study, the critical heat flux (CHF) mechanism in pool boiling of water is experimentally investigated. The experiments are performed using an infrared (IR) camera to measure the temperature and heat flux distributions on the boiling surface. An IR-transparent boron-doped silicon wafer is used as the heater. Boiling takes place from an IRopaque titanium surface that is deposited on the silicon heater. The wetted area fraction (WF), the contact line length density (CLD) and the contribution of various heat transfer mechanism to overall heat transfer were measured throughout the boiling curve. Quantitative analysis of this data at high heat flux and transition through CHF revealed that the occurrence of the unquenchable dry spot triggers CHF.