The Effect of Nanofluid Volume Concentration on Heat Transfer and Friction Factor inside a Horizontal Tube

Table 3

Constants of Nusselt number equation (12).

Nanofluid	a2	b2	c2
TiO2-W	0.02	0.78	0.54
Al2O3-W	0.02	0.788	0.45
SiO2-W	0.02	0.8	0.4