Lower Limit of Saturated Film Boiling around a Vertical Finite-Length Silver Cylinder : Effect of Aspect Ratio

Quenching experiments on the transient film boiling heat transfer from a vertical silver cylinder to a quiescent saturated water at atmospheric pressure have been carried out in the wide ranges of the length (8mm to 160mm) and the diameter (8mm to 100mm) of cylinder. The test cylinder was heated to 600℃ by an electric furnace and then cooled at the immersion depth of about 100mm. The effect of aspect ratio (length-to-diameter ratio) on the lower limit of film boiling for saturated water was discussed. The prediction method was proposed.
長崎大学工学部研究報告 Vol.32(58) p.69-73, 2002