In this paper, the effects of radiation and chemical reaction on MHD oscillatory flow of an optically thin fluid in an asymmetric channel filled with porous medium are investigated. Based on some simplifying assumptions, the dimensionless governing equations are solved analytically using regular perturbation method. The effects of various pertinent parameters such as radiation parameter  Peclet number  chemical reaction parameter  Reynolds number  Schmidt number  magnetic field parameter  porous medium shape factor  thermal Grashof number  solutal Grashof number  and geometric parameters like phase difference  amplitude ratios  mean half width of the channel   phase angle  on concentration, temperature and velocity are discussed numerically and explained graphically. The shear stress, rate of heat and mass transfer coefficients at the channel walls are also derived. It has been found that the flow parameters considerably affect the flow characteristics.

oscillatory flow, asymmetric wavy channel, chemical reaction, heat and mass transfer.