Horizontal Cavity With Bottom Heating
Figure 4-48:
Schematic representation of geometry and parameters for the equivalent thermal conductivity correlation applied to an horizontal cavity heated from below.
The following correlation corresponds to equation 9.49 in
Ref. 21
. It is validated for
3
·
10
5
≤
Ra
H
≤
7
·
10
9
:
(4-205)
where
Ra
H
is computed from the height
H
of the cavity and the temperatures
T
1
and
T
2
of the bottom and top walls, and
Pr
= μ
C
p
⁄
k
. The material data are evaluated at
(
T
1
+
T
2
) ⁄
2.
