Page 262 - Thermal Hydraulics Aspects of Liquid Metal Cooled Nuclear Reactors

232 Thermal Hydraulics Aspects of Liquid Metal Cooled Nuclear Reactors

in
achieved Achieved Re τ 180.09 179.99 180.04 394.65 588.95

numbers t +

Reynolds Aver. time 10,800 24,300 21,600 7900 11,800

friction Δt + 0.027 0.027 0.027 0.0158 0.0195

and
DNS, Δz + 5.89 5.89 5.89 4.85 4.52

of
times

averaging Δy + 0.054–4.42 0.054–4.42 0.054–4.42 0.03–4.85 0.044–7.24

step,
time Δx + 17.7 17.7 17.7 9.69 9.65
grid,
domain, N z 128 384 768 256 384

computational Mesh × N y × N x 129 128 129 384 129 768 257 256 257 384

DNS, L z 4π/3 4π 8π

various × L y 2 2 2 8π 2 8π 2

of 0.01 Domain × L x 4π 12π 24π 2π 2π
Details ¼ Pr

6.1.1.2 at large” 395 590

Table simulations DNS “Normal” “Large” “Very ¼ Re τ ¼ Re τ