Empirical formulae for velocity fields and coefficients of momentum and heat turbulent transfer in linear channels of intricate shape

Empirical formulas for velocity fields and coefficients of turbulent heat transfer in steady flows of liquid in rectilinear channels of complex configuration are presented. The data permit the simplification of the equation solution algorithm of heat transfer in channels with complex boundaries. The effect of interchannel mixing is taken into account in addition to turbulent heat transfer. Formulas for the velocity fields and turbulent heat transfer coefficients were tested using calculations for velocity fields and temperature of liquid steady turbulent flows in a round tube and liquid flow in annular gaps. Suggested formulas for turbulent heat transfer coefficients are widely used for numerical studies of temperature fields in non-standard cells of reactor fuel assembly. A good agreement between calculated and experimental data is obtained.