## THERMAL SCIENCE

International Scientific Journal

### UNSTEADY FLOW AND HEAT TRANSFER OF JEFFREY FLUID OVER A STRETCHING SHEET

**ABSTRACT**

The boundary layer flow and heat transfer of an incompressible Jeffrey fluid have been investigated. The analytic solutions of the arising differential system have been computed by homotopy analysis method (HAM). The dimensionless expressions for wall shear stress and surface heat transfer are also derived. Exact solutions of the momentum equation and numerical solutions of the dimensionless energy equations have been obtained for the steady-state case. The results indicate an increase in the velocity and the boundary layer thickness by increasing the elastic parameter (Deborah number) for a Jeffrey fluid.

**KEYWORDS**

PAPER SUBMITTED: 2011-09-07

PAPER REVISED: 2012-04-28

PAPER ACCEPTED: 2012-05-08

**THERMAL SCIENCE** YEAR

**2014**, VOLUME

**18**, ISSUE

**4**, PAGES [1069 - 1078]

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