HEAT TRANSFER FOR TURBULENT ANNULAR FLOW OF HIGH PRANDTL NUMBER FLUIDS.

Heat transfer for high Prandtl number fluids flowing turbulently in a concentric circular tube annulus with prescribed wall heat flux is investigated analytically. This surface rejuvenation based analysis is restricted to constant properties and negligible viscous dissipation. This formulation leads to predictions for the Nusselt Number that are in basic agreement with predictions obtained on the basis of earlier eddy diffusivity models for 30 less than equivalent to Pr less than equivalent to 1000 and 10**4 less than equivalent to Re less than equivalent to 10**6.