Discussion: “A Review and Parametric Investigation Into Nanofluid Viscosity Modelsâ€‌ (Nwosu, P. N., Meyer, J., and Sharifpur, M., 2014, ASME J. Nanotechnol. Eng. Med., 5(3), p. 031008)

Abstract

Nwosu et al. [1] mentioned the empirical model of Maأ¯ga et al. [2] for ethylene glycol (EG)–خ³Al2O3 nanofluid. It should be noted that Nwosu et al. [1] did not mention the empirical model of Maأ¯ga et al. [2] for water–خ³Al2O3 nanofluid. This empirical model for water–خ³Al2O3 nanofluid wasDisplay Formula(1)خ·=خ·nfخ·bf=1+7.3د•+123د•2Nwosu et al. [1] mentioned the empirical models of Nguyen et al. [3] for Al2O3/H2O nanofluid with various particles sizes of 47 and 36 nm, respectively. It should be noted that Nwosu et al. [1] did not mention the empirical model of Nguyen et al. [3] for CuO/H2O nanofluid with 29 nm particle size. This empirical model for CuO/H2O nanofluid wasDisplay Formula(2)خ·=خ·nfخ·bf=1.475−0.319د•+0.051د•2+0.009د•3Also, it should be noted that the correct form of Eq. (21) in the paper of Nwosu et al. [1] based on the study of Nguyen et al. [3] isDisplay Formula(3)خ·=خ·nfخ·bf=1.1250−0.0007TThat is, the second term on the righthand side is −0.0007T and not −0.007T.