Numerical simulations were conducted to investigate heat transfer characteristics of the subcooled flow boiling in a half heated wall vertical tube with twisted tape insert in the Eulerian multiphase flow model. Correspondingly

the published experimental data was used to verify the simulation results. A good agreement between the simulation and experimental data was observed. Moreover

under conditions with twist ratios of y=4.0

8.0

11.4 for twisted tapes

mass flow rate of 900 and 1 165 kg/(m~2·s)

heat flux of 570 and 741 kW/m~2

the heat transfer characteristics of the tubes in subcooled boiling flow were investigated

such as the vapor volume fraction

onset of nucleate boiling(ONB)

water temperature

wall temperature and heat transfer coefficients. The results show that

THE twisted tape can enhance the heat transfer in subcooled flow boiling under half heated wall in a vertical pipe. The greater the degree of torsion

the enhanced heat transfer for the subcooled flow boiling with twisted tape inserts.