Entropy generation in peristalsis with different shapes of nanomaterial

The purpose of present study is to analyze peristalsis in a vertical channel by using different shapes of nanomaterial. The nanomaterial utilized for this purpose is silver (Ag) with water as base fluid. The study is based on the comparison among different shapes of nanoparticles (bricks, cylinders and platelets). The walls of channel are of flexible nature. Study is done in the light of long wavelength and low Reynolds number approximations. Solution technique utilized here is perturbation with Grashof number as perturbation parameter. Entropy generation analysis is also carried out with different shapes of nanoparticles. The graphs of Bejan number, entropy generation, velocity and temperature are drawn for the sake of comparison for the considered nanoparticles. Streamlines are also studied. The results lead to the fact that an increase in nanomaterial volume fraction decays the velocity and temperature of the nanofluid. The Hall parameter and Hartman number show opposite behavior for velocity, temperature, entropy generation and Bejan number. Highest values of temperature, Bejan number and entropy generation have been seen for brick shaped particles and smallest for platelet shaped particles.