Table 6. Comparison of N u ¯ obtained...

Table 6.

Comparison of $\bar{N u}$ obtained from the present study with experimental findings in a cylindrical annulus filled with air (Pr = 0.71)

	Average Nusselt number (⁠ $\bar{N u}$ ⁠)		Relative difference
Ra	Hamad (1989)	Present study	(%)
5 × 10⁴	6.584	6.551	0.50
1 × 10⁵	6.863	6.812	0.74
1.5 × 10⁵	7.033	6.992	0.58
2 × 10⁵	7.155	7.149	0.83

	Average Nusselt number ( $\bar{N u}$ )	Relative difference
5 × 10⁴	6.584	6.551	0.50
1 × 10⁵	6.863	6.812	0.74
1.5 × 10⁵	7.033	6.992	0.58
2 × 10⁵	7.155	7.149	0.83

Source: Hamad (1989)

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