KURENAI : Kyoto University Research Information Repository

SR gRQR
d = 1
R uR
(AHsub)R 1 .(102)
uR/tR = 1
In addition to the above, the critical heat flux similarity requires
(IC)- ;(:)R = 1
(103)
Using the Katto CHF criterion given by Eq. (74) and Npch similarity criteria,
it can be shown that Eq. (103) becomes
(xc)R
0.043
= 2 = 1 .(104)
uRQR
It is noted'that the exponent of the above expression is very small at 0.043.
This implies that the xc is in the range of 0.6 A, 0.8. Therefore, it may
safely be assumed that Eq. (104) is approximately satisfied if the quality
similarity given by Eq. (100) holds.
From the single phase scaling criteria on geometry given by Eqs. (44)
and (45), it is necessary that
and(105)
uR R
1 gR = Q R
These requirements also satisfy the single phase scaling criteria on the ve-
locity given by Eq. (43). However, the real time simulation cannot be achieved
in case of two-phase flow due to the additional conditions imposed on the sys-
tem. Furthermore, Eq. (105) implies that the power to the system should be
increased in a model. Additional caution should be paid to the simulation of
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