Numerical Simulation of Size Effects on Countercurrent Flow Limitation in PWR Hot Leg Models

Table 1

Test section dimensions and conditions.

Reference	D (m)	𝐿𝐻/D (−)	𝐿𝐼/D (−)	θ (deg)	Fluids	Pressure (MPa)
Ohnuki et al. [7]	0.0254	9.1	1.2	50	Air-water	0.1
Richter et al. [8]	0.2032	4.5	0	45	Air-water	0.1
Mayinger et al. [9]	0.750	9.0	1.1	50	Steam-water	0.3, 1.5
Geffraye et al. [10]	0.351	7.5	3.0	50	Air-water	0.1
Navarro [11]	0.054	9.3	1.9	50	Air-water	0.1
Minami et al. [12]	0.050	8.4	1.2	50	Air-water	0.1

D: diameter, 𝐿_𝐻: length of horizontal pipe, 𝐿_𝐼: length of inclined pipe, θ: angle of elbow.