Some Problems on Heat and Mass Transfer for Casson Hybrid Nanofluid Flow with Convective Boundary Condition

Abstract

newline Abstract newline newline The heat and mass transfer on the Casson-nano fluid and hybrid nanofluid flow in the presence of convective boundary condition has been investigated. Mixed convection stagnation point flow of a incompressible two dimensional Casson fluid flow over a stretching sheet is studied. The effect of external magnetic field,thermal radiation effects, heat absorption and viscous dissipation is taken in account. The governing partial differential equations are transformed into a system of ordinary differential equations using similarity transformation. The similarity equations are solved using MATLAB quotbvp4cquot package. The influence of different governing parameters on velocity, temperature and concentration profile with the skin friction, heat and mass transfer rate are studied and represented in graphical and tabular form. Also studied the effect of the non-linear thermal convection on the Casson fluid flow over permeable surface. Introducing suction / injection effect at the permeable surface along with the Soret and Dufour effect. Velocity ratio plays a vital role which appear due to the free stream flow. With the steadiness, we also discussed the unsteady Casson fluid flow over an infinite vertical plate imbedded in a saturated porous medium. Time parameter is involved in the similarity transformation to convert the partial differential equations into a system of ordinary differential equations. Unsteadiness parameter and momentum slip parameter shows a significant effect on the governing system. A three-dimensional Casson flow past a stretching surface has been discussed. The influences of Casson-nanofluid and hybridnano-fluid of various parameters such as the magnetic field, radiation and permeability are taken into account. Using the similarity transformation which involved to simplify the governing equation and make ready to use the numerical technique. Adomain decomposition Method (ADM) which is based on the inverse Laplace method, used to solve the governing equations. The influence of the governing parameters on the velocity, temperature, skin friction act on surface along different axial direction and local Nusselt number are investigated. Later, we have studied the influence Soret and Dufour effect on the three dimensional Casson fluid flow over a linear stretching sheet. Significant phenomena are pointed out and displayed through graphs and tables. newline newline