Heat and mass transfer analysis in the mixed convective peristaltic flow of fourth-grade fluid under
viscous dissipation, Dufour and Soret effects is carried out. Mathematical model is formulated by
incorporating long wavelength and low Reynolds number assumptions. The resulting coupled nonlinear
boundary value problem (BVP) has been solved numerically by Keller–box method. The computations
are validated through the built in routine for solving nonlinear boundary value problems via shooting
method through the software Mathematica. The results indicate an increase in the pumping rate and a
decrease in the temperature and concentration functions with an increase in the elastic parameter
(Deborah number) for fourth grade fluid. The temperature and concentration are increasing functions of
the buoyancy forces due to temperature and concentration gradients.
