MIXED CONVECTION FROM A ROTATING CONE WITH VARIABLE SURFACE-TEMPERATURE

A general analysis of steady laminar mixed convection heat transfer be tween a quiescent fluid and a rotating or nonrotating cone is presente d. A new mixed convection parameter, which also represents a dimension less streamwise coordinate, is proposed to serve as an index of the re lative contributions of free convection and rotational (forced) convec tion. Appropriate coordinate transformations yield computationally eff icient numerical solutions which are uniformly valid over the entire r ange of mixed convection from the pure free convection limit (nonrotat ing cone) to the pure forced convection limit (rotating cone). Of part icular interest are the effects of the fluid Prandtl number, the power function index (nonisothermal factor), and mixed convection parameter on the local skin friction coefficient and the local Nusselt number.