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

Table 2

Convergence criteria and advection scheme.

Turbulence model	Advection scheme	Time step [s]	Physical time [s]
SST	2nd or higher order	4.6⋅10^−2	Steady state
LES	Central difference	7⋅10^−4	1.25