In order to analyze the effect of relative location of heating surface on microbubble emission boiling(MEB),the subcooled boiling occurred on an imbedded heating surface was experimentally studied,and compared with that on a flush heating surface.At liquid subcooling of 25-50 K,MEB was observed on an imbedded heating surface that lowers tank bottom for 3 mm.The heat flux in MEB reaches 5.55 MW/m2 at liquid subcooling of 50 K.Visualized results indicate that a vapor film forms on the heating surface,and expa...