Laminar forced convection heat transfer in radially rotating circular channels of the rotor of the high-speed heat regenerator has been investigated. Mean values of the convective mass/heat transfer coefficient in these channels were measured electrolytically. The measurements were made for Ro = 0.1 and Ro = 0, in the range of Reynolds number from 250 to 1200. The value of Rossby number and the range of Reynolds number result from the hydraulic characteristics of the regenerator. Finally, the correlations have been formulated for Chilton-Colburn coefficient vs. Reynolds number and for Nusselt number vs. Reynolds number. In order to estimate the error of the heat transfer coefficient resulting from application of the mass/heat transfer analogy, a comparison of experimental thermal investigation, mass transfer experiments using electrolytic technique and theoretical analysis results has been performed in some defined cases. (C) 2003 Elsevier Ltd. All rights reserved.