Subcooled flow boiling in circumferentially nonuniform and uniform heated vertical channels with downward flow

Results are presented for new experimental data for subcooled flow boiling heat transfer in circumferentially nonuniforms (single-side) and uniformly heated tubes. Although the Liu-Winterton correlation had better agreement at low power levels and axial locations. Shah's correlation had better agreement at higher power levels and at axial locations near the center of the heated length. Both correlations overpredicted the data near the exit. Therefore, additional correlational developmental work is needed for local (axial) flow boiling heat transfer in circumferentially nonuniform heated channels.