Prediction of Minimum Heat Flux for Water Jet Boiling on a Hot Plate

A theoretical analysis was carried out for predicting the minimum heat flux (MHF) point of boiling curves for water jet impingement boiling on the horizontal high-temperature plate at the jet stagnation zone with the same size as the nozzle. Simplified two-phase flow boundary-layer equations were used to derive a limiting flow condition of the steady vapor layer, and from it the qualitatively theoretical equations were obtained for predicting the MHF point. The equations factors were determined from the experimental data presented by the author and other researchers. Semitheoretical correlations were proposed for predicting the wall superheat and the MHF at the MHF point, and these correlations agreed with existing experimental data