Heat and mass transfer with viscous dissipation in horizontal channel partially occupied by porous medium in the presence of oscillatory suction

This paper deals with unsteady oscillatory flow of viscous incompressible fluid with heat & mass transfer in a horizontal channel partially occupied by porous medium following the darcy-brinkman model. the inner territory of the channel consists of two regions; one of them is filled with porous material and second is clear fluid. at the porous medium fluid interface,interfacial coupling conditions for the fluid velocity,temperature and concentration were used to derive the analytical solution. some standard values of schmidt number like hydrogen(0.22),helium(0.30),amonia(0.78); eckert number (0.25,0.5,1,2) and prandtl number for water(0.71) and air(7.0) was considered in this paper. the effects of pertinent physical fluid parameter like porosity,viscosity ratio,density ratio etc. on velocity,temperature and concentration distribution are considered and demonstrated through graphs. heavier diffusive species and high molecular diffusivity ratio decreases the fluid concentration throughout the region. increasing values of prandtl number upsurge the fluid temperature throughout the region. © 2017 aname publication. all rights reserved.