Radiation and non-uniform heat sink/source effects on 2D MHD flow of CNTs-H_2O nanofluid over a flat porous plate

摘要

Purpose - The purpose of this paper is to examine the velocity and temperature profile for a two-dimensional flow of single- and multi-walled nanotubes (CNTs)/H_2O nanofluid over a flat porous plate, under the impact of non-uniform heat sink/source and radiation. The influence of suction/blowing, viscous dissipation and magnetic field is also incorporated. Design/methodology/approach - The solution of the PDEs describing the flow of nanofluid is accomplished using Runge-Kutta-Fehlberg approach with shooting scheme. Findings - Quantities of physical importance such as local Nusselt number and skin friction coefficient for both types of nanotubes are computed and shown in tables. Also, the impact of copious factors like Prandtl number, magnetic field, Eckert number, porosity parameter, radiation parameter, non-linear stretching parameter, injection/suction, heating variable, particle volume fraction and non-uniform heat sink/source parameter on temperature and velocity profile is explained in detail with the aid of graphs. Originality/value - Till date, no study has been reported that examines the role of radiation and nonuniform heat sink/source on MHD flow of CNTs-water nanofluid over a porous plate. The numerical outcomes attained for the existing work are original and their originality is authenticated by comparing them with earlier published work. This problem is of importance, as there are many applications of the fluid flowing over a flat porous plate.