An advanced study of forced turbulent-flow film boiling for subcooled liquid with high velocity in a circular tube

A further advanced semi-empirical theory for the turbulent film boiling heat transfer of subcooled liquid flowing with high velocity in a circular tube is presented in this paper. A new analytical expression has been obtained theoretically and it is found that the exponent ofRe _D in the expression can be predicted analytically with an universal constant value of 4/5 for different fluids. Meanwhile, it is revealed that the coefficientk is correlated withk′, and thatk determined for flowing along plate can be extended to the case for flowing in a circular tube. The analyses show that new analytical expression concides really with the results presented before [5].