Convective heat transfer to Sisko fluid over a rotating disk

TL;DR

This study investigates the steady flow and heat transfer of Sisko fluids over a rotating disk, analyzing effects of shear thinning/thickening behavior and comparing results with power-law and Newtonian fluids.

Contribution

It provides a numerical analysis of Sisko fluid flow and heat transfer over a rotating disk, including parameter effects and comparisons with other fluid models.

Findings

Velocity and temperature fields are characterized for various parameters.

Velocity gradients and Nusselt numbers are tabulated for different conditions.

Results agree well with previous studies as a special case.

Abstract

This article deals with study of the steady flow and heat transfer characteristics of Sisko fluid over a rotating infinite disk. The flow and heat transfer aspects are thoroughly investigated encompassing highly shear thinning/thickening Sisko fluids. The modeled boundary layer equations are reduced to a system of nonlinear ordinary differential equations using the appropriate transformation. The resulting equations are then solved numerically by shooting method in the domain . The numerical data for the velocity and temperature fields are graphically sketched and effects of the relevant parameters are discussed in detail. In addition, the velocity gradients at the disk surface and the local Nusselt number for different values of the pertaining parameters are given in tabulated form. Further, the flow and temperature fields of power-law and Newtonian fluids are also compared with those Sisko fluid. Moreover, a comparison with previously published work, as a special case of the problem, has been provided and the results are found to be in excellent agreement.