(Ijaamm, 2018) Mkwizu, M. H; Matofali, A. X; Ainea, N
This work investigates the combined effects of thermophoresis, Brownian motion and variable viscosity on entropy
generation in a transient generalized Couette flow of nanofluids with Navier slip and convective coolingof water-based
nanofluids containing Copper (Cu) and Alumina (Al 2 O 3 ) as nanoparticles. Both first and second laws of thermody-
namics are applied to analyse the problem. The nonlinear governing equations of continuity, momentum, energy
and nanoparticles concentration are tackled numerically using a semi discretization finite difference method together
with Runge-Kutta Fehlberg integration scheme. Numerical results for velocity, temperature, and nanoparticles con-
centration profiles are obtained and utilised to compute the entropy generation rate, irreversibility ratio and Bejan
number. Pertinent results are displayed graphically and discussed quantitatively.