Phenomenological behavior of Bubbles and dry spots at CHF on a short heated wall: Pool boiling of R-113

소형가열면에서 CHF 발생시 Bubble 및 Dry Spot의 현상학적 거동 R-113의 수조비등

A simultaneous visualization of the behavior of bubbles and dry spots has been carried out for pool boiling of R-1l3 on a horizontal heater. From video imaging and image processing analysis, the formation of bubbles and dry spots occurs simultaneously, and therefore they should be considered as a synchronized concept rather than independent identities. The dry spot density is equivalent to the active site density in the region before CHF. At CHF point, large dry areas due to the coalescence of neighboring dry areas cover the heater surface.