Influence of viscous dissipation on a copper oxide nanofluid in an oblique channel: Implementation of the KKL modelNaveed Ahmed, Adnan, Umar Khan, Syed Tauseef Mohyud-Din and Raheela ManzoorEur. Phys. J. Plus, 132 5 (2017) 237DOI: https://doi.org/10.1140/epjp/i2017-11504-y