Carbon nanotube analysis for an unsteady physiological flow in a non-uniform channel of finite length Noreen Sher Akbar, Ayesha Ayub and Adil Wahid Butt Eur. Phys. J. Plus, 132 4 (2017) 177 Published online: 18 April 2017 DOI: 10.1140/epjp/i2017-11451-7