Abstract
In this article, a mathematical model is analyzed to investigate the effects of Hall current and heat transfer on the flow of a fourth :trade fluid between two heated and rotating disks. The corresponding problem of velocity and temperature are solved analytically by homotopy analysis method. Comparison is given between the results of velocity in fourth grade. third grade. second grade, and vi SCOW: fluids. The variation of pertinent parameters are graphed and discussed. (C) 2010 Wiley Periodicals. Inc. Numer Methods Partial Differential En 26: 501-518, 2010