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Table 5 Statistical data on the relative viscosity of nano-lubricants

From: Experimental Study of Rheological Behavior of MWCNT-Al2O3/SAE50 Hybrid Nanofluid to Provide the Best Nano-lubrication Conditions

Nano-lubricant \(\dot{\gamma }\)(s−1) T
(°C)
\(\frac{{\mu }_{\rm nf}-{\mu }_{bf}}{{\mu }_{bf}}\times 100\)(%)
\(\varphi =0.0625\mathrm{\%}\) \(\varphi =0.125\mathrm{\%}\) \(\varphi =0.75\mathrm{\%}\) \(\varphi =1\mathrm{\%}\)
MWCNT-Al2O3
(50%-50%)/SAE50
3999
(300 rpm)
25 0.86 1.04 1.17 1.24
30 0.86 1.05 1.15 1.21
35 0.84 1.01 1.11 1.16
40 0.85 1.01 1.10 1.14
6665 (500 rpm) 30 0.85 1.04
35 0.83 (− 17%) 1.01 1.11 1.16
40 0.84 1.01 1.10 1.15
45 0.84 1.01 1.08 1.14
50 0.85 1.01 1.09 1.15