In this paper

the mass transfer problem of laminar natural convection for non-Newtonian viscoelastic fluids is studied. The Oldroyd model with three parameters is used as an constitutive equation. Experiments were carried out with an electrochemical method. A comparison between the theoretical results and electrochemical experimental data was made.It was found that apparently asymptotic solutions conformed very well with electrochemical experimental data and the elasticity of viscoelastic fluids had a definite eitect on the process of mass transfer.