Simulation and investigating of pure water pool boiling’s heat transfer coefficient as a result of groove geometry on a flat surface at atmospheric pressure

Two grooved surfaces are employed to increase the purified water boiling’s coefficient of heat transfer under atmospheric pressure. Also, the simulation of purified water’s pool boiling has been investigated with Comsol 5-6 software. It is worth mentioning that these surfaces contain some grooves via the same width, depth, and distance on the surface under two parallel and concentric arrangements. In this matter, the flux of heat varies between 0-212 KW.m-2. From the conducted experiments we realize that the flux of heat at the nucleate boiling’s beginning for the considered grooved surfaces is noticeably lower compared to one of the base surfaces while their coefficient of heat transfer is higher. Besides, the increasing rate of coefficient of heat transfer at surfaces with the parallel grooves is on average between 8-32%, whereas it is between 19-90% for the surfaces with the concentric grooves. As a valuable outcome, this survey confirms that in comparison to surfaces with parallel grooves, surfaces with concentric grooves have a higher coefficient of heat transfer. when geometric conditions are the same (such as: distance, depth, width of the groove and more important than the others, the same surface increase rate.