AbstractThe paper presents a theoretical and experimental investigation of liquid solidification in the combined hydrodynamic and thermal entrance region of a circular tube with a uniform wall temperature. The theoretical solution assumes that axial variations in liquid‐solid interface are gradual and considers that effects of radial velocity component are significant in the entrance region. The theoretical analysis yields profiles of liquid‐solid interface, pressure drop and heat transfer coefficient for the cases of Pr = 7 and 10.Experimental work using water as a working medium was carried out to verify the theoretical result by employing two double‐pipe heat exchangers with a small inner tube diameter to prevent free convection effects. A series of experimental data was obtained to calculate the mean heat transfer rate. Comparison between the experimental data and the theoretical results is made. Reasonable agreement is obs