Thermal Radiation Effects on Heat and Mass Transfer over an Unsteady Stretching Surface

The unsteady heat, mass, and fluid transfer over a horizontal stretching sheet has been numerically investigated. Using a similarity transformation the governing time-dependent boundary layer equations for the momentum, heat, and mass transfer were reduced to a sets of ordinary differential equations. These set of ordinary differential equations were then solved using the Chebyshev pseudo-spectral collocation method, and a parametric analysis was carried out. The study observed, among other observations that the local Sherwood number increases as the values of the stretching parameter ð ´ and the Schmidt number 𠑆 ð ‘ increase. Also the fluid temperature was found to be significantly reduced by increases in the values of the Prandtl number 𠑃 ð ‘Ÿ , the unsteadiness parameter ð ´ , and the radiation parameter ð ‘… . The velocity and concentration profiles were found to be reduced by increasing values of the unsteadiness parameter ð ´ .