Abstract
The unsteady stagnation-flow over a stretching sheet with suction in a nanofluid using the Buongiorno’s model is numerically investigated. By using an appropriate similarity transformation, similarity equations are obtained and the shooting technique is used to solve these equations. The results are obtained for the skin friction coefficient, the local Nusselt, the local Sherwood number, the velocity, temperature and concentration profiles for some values of the governing parameters, namely the unsteadiness parameter, the mass suction parameter, the Brownian motion parameter, the thermophoresis parameter and the stretching parameter. The results show that the skin friction decreases when the stretching parameter increases. The Nusselt number and the Sherwood number increase when the unsteadiness parameter decreases. It is also found that the Nusselt number decreases with increasing of both the Brownian motion and thermophoresis parameters. Whereas the increment value of the Brownian motion parameter and the reduce value of the thermophoresis parameter increase the Sherwood number.
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