Abstract

A numerical investigation is performed of the problem on heat transfer and hydraulic drag in the hydrodynamic and thermal initial sections of a round tube heated by the qw = const law, under conditions of laminar flow of gases with varying physical properties. Monatomic, diatomic, and polyatomic gases and gas mixtures are treated, as well as the range of heat loads Q+in up to 20. The obtained results are used to analyze disagreement between the available literature data; methods are suggested for improving the engineering procedure of thermohydraulic design under laminar flow of gases and the known model of stabilized flow and heat transfer.

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