The computation of turbulent natural convection flows - Turbulence ...

Inclined Cavity-2D simulations 164
Nu
20
15
10
5
Cold Wall
0
0 0.2 0.4 0.6 0.8 1
Y
EXP
k-ε-AWF
Figure 6.30 – Nusselt distribution along the cold wall of60 ◦ stable inclined tall
cavity resulting fromk-ε-AWF.
V/V 0
V/V 0
0.4
0.2
0
-0.2
-0.4
Y=0.95
EXP
LRN
AWF
SWF
-0.6
0 0.2 0.4 0.6 0.8 1
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
X
Y=0.5
EXP
LRN
AWF
SWF
0 0.2 0.4 0.6 0.8 1
X
V/V 0
V/V 0
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
0.8
0.6
0.4
0.2
0
-0.2
-0.4
Y=0.7
EXP
LRN
AWF
SWF
0 0.2 0.4 0.6 0.8 1
X
Y=0.1
0 0.2 0.4 0.6 0.8 1
X
EXP
LRN
AWF
SWF
Figure 6.31 – Mean velocity distributions within a60 ◦ stable inclined tall cavity
resulting from k-ε using LRN, AWF and SWF.
Figure 6.31 shows mean velocities parallel to the hot and cold walls result-
ing from the k-ε model, using LRN, AWF and SWF compared with the corre-
sponding experimental measurements. The data shows that the fluid moves
up parallel to the hot wall from the bottom of the hot wall with high veloc-
ity and decelerates as it approaches the top of the hot wall. Then the fluid