Natural convection flow of a two-phase dusty non-Newtonian fluid along a vertical surface

• Published in: International journal of heat and mass transfer 2017-10, Vol.113, p.482-489
• Main Authors: Siddiqa, Sadia, Begum, Naheed, Hossain, Md. Anwar, Gorla, Rama Subba Reddy
• Format: Article
• Language: English
• Subjects: Boundary layer; Boundary layers; Computational fluid dynamics; Convection; Dusty fluid; Finite difference method; Fluid flow; Fluids; Heat transfer; Mathematical models; Modified power law; Natural convection; Non-Newtonian fluids; Prandtl number; Shear stress; Temperature; Temperature profiles; Two-phase; Velocity; Vertical surface; Viscosity
• ISSN: 0017-9310; 1879-2189
• DOI: 10.1016/j.ijheatmasstransfer.2017.05.080

•In this paper, two-phase dusty non-Newtonian fluid flow is studied.•The modified power-law viscosity model is employed to obtain the solutions.•The governing equations are solved numerically by using finite difference method.•Results are presented in terms of heat transfer rate and shear stress rate.•Velocity, temperature, streamlines and isotherms are presented for important parameters.•It is observed that power-law fluids are more likely to promote the heat transfer rate. The aim of this paper is to present a boundary-layer analysis of two-phase dusty non-Newtonian fluid flow along a vertical surface by using a modified power-law viscosity model. This investigation particularly reports the flow behavior of spherical particles suspended in the non-Newtonian fluid. The governing equations are transformed into non-conserved form and then solved straightforwardly by implicit finite difference method. The numerical results of rate of heat transfer, rate of shear stress, velocity and temperature profiles and streamlines and isotherms are presented for wide range of Prandtl number, i.e., 0.7⩽Pr≤1000.0, with the representative values of the power-law index n. A good agreement is found between the present and the previous results when compared for some special cases. The key observation from the present study is that the power-law fluids with (n>1) are more likely to promote the rate of heat transfer near the leading edge.