An accurate wall temperature measurement using infrared thermometry with enhanced two-phase flow visualization in a convective boiling system

The wall temperature tracking algorithm on the proposed heater wall design was validated both for steady-state and transient conditions. Also, such algorithm was proved to be applicable for the heat flux measurement. Finally, the feasibility of the present approach was demonstrated through a subcooled flow boiling experiment. The results showed that both the hydrodynamic motions of bubble and the corresponding wall temperature can be captured with high fidelity using the measurement strategy presented, from which the interrelation between the sliding vapor bubbles and the wall heat transfer were discussed.