A Correlation in Displacement Velocity of Liquid Film Boundary formed on a Heated Vertical Surface in Emergency Cooling

Wetting of a hot vertical surface by a flowing liquid film

“…sec, and this difference increases with a decrease in flow rate. At F >_ 1 kg/ m. sec, all of the data in the present study agrees with the data in [4], regardless of the number of load cycles. At t l = 30~ the data for the purely metallic and oxide-coated surfaces agree over nearly the entire investigated range of spraying densities.…”

“…Analysis of data from our experiments (Fig. Ic) and the data of other authors [4,6] shows that, in the region up to boiling of the liquid, the flow rate of the liquid in the film has a strong effect on wetting rate. Also, as indicated above, there is a range of flow rates in which the condition of the surface has no effect on wetting rate, and this range is broader, the lower the tempera~Ire of the liquid.…”

“…Effect of different parameters on u~ "l (a-c, e -stainless steel; a-d-q = 0); a) t/0 = 50~ (1 -F = 0.5 kg/m. sec; 2 -1.5); b) two = 400~ (1 -F = 0.5 kg/m 9 see; 2 -1.5); c) Two = 400~ (1 -purely metallic surface; 2 -surface with oxide layer; 3data from[4]; I-tl0 = 30~ II-50; HI-70); d) two = 400~ t/0 = 50~ (1 -stainless steel; 2 -zirconium alloy); e) two = 400~ t/0 = 50~ (1 -q = 1.7 9 104 W/m2; 2 -0). The solid lines denote calculated data.…”