CFD Turbulence Study of PWR Spacer-Grids in a Rod Bundle

Table 1

Mesh detail summary.

Spacer type	Cell elements [million]	𝑦^+ range (average) [—]	Max. cell length streamwise/spanwise [m]
Swirl	25.98	0.09–2.63 (1.08)	3⋅10^−4/1.8⋅10^−3
Split	25.53	0.06–2.98 (1.13)	3⋅10^−4/1.8⋅10^−3