Table 3.

Comparative results of $N{u}_{av}$.

	Iwatsu et al. [56]	Sheremet and Pop [57]	Malleswaran and Sivasankaran [58]	Hussain [28]	Present Study	Dev. (%)
Re	$N{u}_{av}$
100	1.94	2.09		2.03	2.029	0.049 %
400	3.84	4.07	4.08	4.07	4.045	0.620 %
1000	6.33	6.70	6.48	6.58	6.498	1.261 %