Flow and mass transfer on a stretching sheet with a magnetic field and chemically reactive species

An analysis has been carried out to obtain the flow and mass transfer chara cteristics of a viscous electrically conducting fluid on a continuously str etching surface with non-zero slot velocity. The motion is caused solely by the stretching surface which introduces non-similarity in the velocity and concentration fields. The partial differential equations governing the bou ndary layer flow and mass transfer are solved by using an implicit finite-d ifference scheme. The magnetic field significantly increases the surface sk in friction, but slightly reduces the surface mass transfer. The surface ma ss transfer strongly depends on the Schmidt number and the reaction rate an d it increases with their increasing values. The surface mass transfer for the first-order reaction is more than that for the second- or-third-order r eaction. (C) 2000 Elsevier Science Ltd. All rights reserved.