Unsteady Stagnation Point Flow of Nanofluid over a Stretching/Shrinking Sheet in a Porous Medium

Abstract

-In this paper two dimensional stagnation point of unsteady nanofluid flow over a stretching/shrinking sheet embedded in a porous medium is analyzed numerically and effects of porosity, heat generation and volume fraction on Nusselt number, skin friction coefficient and convergence time and velocity and temperature distribution are investigated in detail. Also different behaviors of stretching and shrinking sheets are observed. Results are reported for three different volume fraction values (0 − 0.1 − 0.2). It is found that velocity step change increases skin friction coefficient while it has opposite effect on Nusselt number. Stretching sheet showed higher variation in skin friction coefficient value with time while shrinking sheet presented higher variation of Nusselt number.

Slip Effect on Stagnation Point Flow and Heat Transfer Over a Shrinking/Stretching Sheet in A Porous Medium with Suction/Injection

“…They performed the numerical analysis on nonlinear shrinking cases involving a porous medium. Later, Shomali et al, [32] analyzed the unsteady flow of a nanofluid in porous media and discovered that as the velocity slip changes, the skin friction rises. Then, Jamaludin and Nazar [33] further investigated an exponential case in a porous medium and discovered that an exponential case has a larger possible solution compared to the linear case.…”

MHD Stagnation Point Flow in Nanofluid Over Shrinking Surface Using Buongiorno's Model: A Stability Analysis

“…Noor et al, [8] have deliberate nanofluid over a shrinking sheet. While Shomali et al, [9] had considered the problem of unsteady flow in nanofluid. Another study has also regarded the effect of magnetohydrodynamics (MHD) boundary layer since this provides excellent support for the fluid flow.…”