Page 297 - Thermal Hydraulics Aspects of Liquid Metal Cooled Nuclear Reactors

10
9

8
7
6
θ + 5

4
3
2
1

0
−1 0 1 2 3
10 10 10 10 10
y +
Fig. 6.1.2.9 Mean temperature profiles for the turbulent channel flow at Re τ ¼ 2000: LES Pr ¼
0.01 (solid), LES Pr ¼ 0.025 (thick dash). The theoretical near-wall molecular behavior,
+
+
θ ¼ Pr y , is also displayed for Pr ¼ 0.01 (thin dash) and 0.025 (thin dash-dot).
(From Duponcheel, M., Bricteux, L., Manconi, M., Winckelmans, G., Bartosiewicz, Y., 2014.
Assessment of RANS and improved near-wall modeling for forced convection at low Prandtl
numbers based on LES up to Re τ ¼ 2000. Int. J. Heat Mass Transf. 75 (2), 470–482.)

1.2

1
¯ q +
0.8

q + 0.6 ¯ q +
M

0.4

0.2 ¯ q t +

0
0 500 1000 1500 2000
y +

Fig. 6.1.2.10 Heat flux decomposition for the turbulent channel flow at Pr ¼ 0.01 and Re τ ¼
0 +
1
+
+
+
+
0
2000. Molecular heat flux q ¼ Pr dθ =dy , turbulent heat flux q ¼ v θ , and total heat
M t
+
+
+
flux q ¼ q + q (solid thick).
t
M
(From Duponcheel, M., Bricteux, L., Manconi, M., Winckelmans, G., Bartosiewicz, Y., 2014.
Assessment of RANS and improved near-wall modeling for forced convection at low Prandtl
numbers based on LES up to Re τ ¼ 2000. Int. J. Heat Mass Transf. 75 (2), 470–482.)