OCR Text |
Show The quantity of M w ( liquid, water) consists of combined meltwater and water of condensation, as long as these are not subjected to further phase changes and are available as run- off. Mw = - \( Q + B)- xL ( fro - * L) ~ °' 6 2 3 r g XL ( E0 - eL)] ( 17) prsl pcp J is depicted in Fig. 4 for p = 760 torr, with MW/< Z, as group parameter at the upper edge of the figure. Liquid water does not occur in the domain of a non-melting surface and here H^,/ CL. = 0. In the melting surface domain, the curves of M.,/&, = constant are straight lines parallel to the boundary line. The equation for vapor deposition at the surface, __ W 0,623 , . MD= = XL( E- tL) < 18> p PPCP is depicted in Fig. 5 for p = 760 torr, where the group parameter - Mp l( XL is at the right margin of the figure. In the domain of non- melting surface, M p = - M. The curves thus correspond to those of Fig. 2, but in Fig. 5 actually have a spacing of 0.002 mm h" 1/ mcal cm" 2 min- 1 deg" 1. The curves are inflected at the domain boundary and become straight lines parallel to the abscissa in the melting-surface domain, where the determining expression for W, E - eL = E 0 " eL > is independent of T^ + ( Q + Bj/( ZL 15 |