Melting heat transfer in a boundary layer flow of a second grade fluid under Soret and Dufour effects

Abstract

Purpose

The boundary layer flow and heat transfer of second grade fluid in a region of the stagnation point over a stretching surface has been examined. Thermal-diffusion (Dufour) and diffusion-thermo (Soret) effects combined with melting heat transfer are also considered. Suitable transformations are employed to convert the partial differential equations representing the conservation of mass, momentum, energy and diffusion into the system of ordinary differential equations. The series solutions for the flow quantities of interest are presented. Interpretation to velocity, temperature and concentration is assigned. Numerical values of the local Nusselt and Sherwood numbers have been computed. The paper aims to discuss these issues.

Design/methodology/approach

Analytic approach homotopy analysis method (HAM) is used to find the convergent solution of melting heat transfer in a boundary layer flow of a second grade fluid under Soret and Dufour effects.

Findings

In this article the main findings are as second grade fluid; melting heat transfer; Soret and Dufour effects; mass transfer; stretching sheet. It is noted that melting heat transfer enhances the flow. Moreover, the effects of Soret and Dufour parameters have opposite effects on the temperature and concentration fields.

Originality/value

The performed computations show that the behaviors of Prandtl number Pr and Schmidt number Sc on the dimensionless temperature and concentration fields are similar in a qualitative sense.

Citation

Hayat, T., Hussain, M., Awais, M. and Obaidat, S. (2013), "Melting heat transfer in a boundary layer flow of a second grade fluid under Soret and Dufour effects", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 23 No. 7, pp. 1155-1168. https://doi.org/10.1108/HFF-09-2011-0182