This study is aimed at solving the classical heat transfer problem arising in components of the gas reactor with very high coolant temperatures (VHTR). Numerical modeling methods are used to analyze heat transfer from the inner wall of a round tube to a flow of helium–xenon mixtures of varying compositions. The influence of massive electrodes located at the inlet and outlet on heat transfer in the central part of the tube, as well as variation in the Prandtl number of the mixed gas coolant in the range from 0.23 to 0.7, is taken into account. Heat input was implemented by a volumetric heat source both in the tube itself and in the massive electrodes.
Naumkin et al. (Mon,) studied this question.