Figure 4
From: A Novel Equivalent Agglomeration Model for Heat Conduction Enhancement in Nanofluids

Enhanced thermal conductivity as a function of nanoparticle volume fraction.
(a) Comparison of the theoretical predictions and experimental data for CuO/water (r = 11.8 nm) in Lee et al.25. (b) Comparison of the theoretical predictions with the experimental data for CuO/ethylene glycol (r = 11.8 nm) in Lee et al.25.