Figure 6From: Enhancement of heat transfer and entropy generation analysis of nanofluids turbulent convection flow in square section tubesAverage Nusselt number comparison with the correlations proposed by Pak and Cho [19], Xuan and Li [20]and Maiga et al. [22]for (a) φ = 0%, (b) φ = 1%, (c) φ = 4% and (d) φ = 6%.Back to article page