Effects of unsteady expansion/contraction of Wang's cylinder problem with suction near a stagnation point

Abstract

The unsteady viscous incompressible stagnation point flow over an expanding/contracting cylinder with heat and mass transfer is studied in this article. The governing partial differential equations are transformed into a couple nonlinear ordinary differential equations by using similarity transformation. These obtained nonlinear ordinary differential equations are solved numerically by using spectral method. There exist unique, dual, and triple solutions in the presence of unsteadiness parameter S for different values of velocity ratio parameter. The ranges for which the unique, dual, and triple solutions exist are shown through graphs and in tabular form. It is observed that the temperature and thermal boundary layer thickness decrease by increasing the absolute values of S in expanding cylinder case. However, this behavior is opposite in contracting cylinder case. © 2014 Curtin University of Technology and John Wiley & Sons, Ltd.

Stagnation Point Flow and Heat transfer of Hybrid Nanofluid over a Stretching/Shrinking Cylinder with Suction/Injection Effects

“…On the other hand, Javed and Mustafa [7] investigated the unsteady viscous incompressible stagnation point flow over a stretching/shrinking cylinder with suction and heat transfer. Sulochana and Sandeep [8] analysed the stagnation point flow and heat transfer behavior of copper-water nanofluids into horizontal and exponentially osmotic stretching/shrinking cylinders.…”