Exact numerical solutions, essentially free of empiricism were obtained for fully developed turbulent forced convention in concentric circular annuli with uniform heating on the inner wall and no heat transfer the through the outer wan. The numerically computed values of Nu are represented almost exactly as a function of Nu(0), Nu(1,) Nu(infinity) and Pr-t/Pr. Here, Nu(0) and Nu(infinity) are the limiting and asymptotic solutions for Pr = 0 and Pr --> infinity respectively, and Nu(1) is the special solution for Pr = Pr-t approximate to 0.8673. The predicted values for all Re, all Pr, and all aspect ratios are in agreement with the experimental data within their scatter. (C) 2004 Elsevier Ltd. All rights reserved.