Estimating Al2O3–CO2 nanofluid viscosity: a molecular dynamics approach Zeeshan Ahmed, Atul Bhargav and Sairam S. Mallajosyula Eur. Phys. J. Appl. Phys., 84 3 (2018) 30902 Published online: 14 January 2019 DOI: 10.1051/epjap/2018180200