Jökull - 01.12.1966, Page 42

eXPONSNT, n EXPoNENT
h =S7S SCu.//b.
O
rapid for equilibrium to be attained be-
tween the two phases. Since the value of e
almost certainly decreases with decreasing
dryness fraction, this explanation is not
necessarily contradicted by the fact that n
turns out to be smaller than np in the case
of the lower enthalpy values.
The above conclusions are based upon the
general positions and trends of the curves. The
analysis presented claims only to deal with first
order-of-magnitude effects because it embraces,
besides its own limitations, any inaccuracies in
the observations made by James. The theory is
not adequate to separate the respective effects
of friction and thermal disequilibrium. Neverthe-
less, it will probably be conceded that the con-
clusions (1) to (6) above accord with expecta-
tions.
FLOW MEASUREMENTS
BY DILUTION METHODS
The State Electricity Authority, Iceland, to-
gether with Vermir sf., of Reykjavik, Iceland,
have conducted a research programme to in-
vestigate the possible use of dilution methods
using salt (NaCl) or argon gas. Difficulties were
encountered in obtaining satisfactory mixing,
resulting in inconsistent data. This difficulty
appears now to have been overcome following
alterations of the equipment used. According
to preliminary tests the salt-dilution method
now gives relatively consistent results with a
196 JÖKULL