Abstract:
The aim of this thesis is to investigate the mass transfer analysis in the two-dimensional
boundary layer flow of Newtonian/non-Newtonian fluids near a stagnation point in the
presence of chemically reactive species. Both homogeneous and heterogeneous chemical
reactions are considered by taking the n th order homogeneous chemical reaction of constant
rate k n and the diffusion coefficients of both reactant and autocatalysis are equal in
heterogeneous reaction. Heat transfer analysis is also performed using Fourier’s and
Cattaneo-Christov heat flux models with thermal radiation and heat generation/absorption.
The modeled flow equations in terms of continuity, momentum, temperature and
concentration are transformed into nonlinear ordinary differential equations by means of
similarity transformations. Both analytical and numerical solutions are obtained by solving
these equations using homotopy analysis method (HAM), Runge-Kutta-Fehlberg algorithm
with shooting technique and bivariate spectral collocation quasi-linearization method. A
parametric study of all pertinent parameters is accomplished and the physical results are
shown through graphs and tables. It is inferred that the concentration of the species decreases
with an increment in the strength of homogeneous and heterogeneous reaction parameters,
while the concentration boundary layer thickness increases. Furthermore, after a certain value
of dimensionless space variable, homogeneous and heterogeneous reactions has no effect on
the concentration of reactant and this critical value of space variable depends on the strength
of homogeneous reaction.
