Deteriorated turbulent heat transfer (DTHT) of gas up-flow in a circular tube: Experimental data

The major focus of this paper is to present experimental data, collected for three gases - nitrogen, helium, and carbon dioxide, at the deteriorated turbulent heat transfer (DTHT) regime in gas up-flow with near uniform heat flux. The data were collected for a range of (1) inlet Reynolds number from 1800 to 42,700, (2) inlet buoyancy number Bo∗ up to 1 × 10−5and (3) inlet acceleration parameter Kv up to 5 × 10−6. Based on the new experimental data, the traditional thresholds for the DTHT regimes are updated, and a new heat transfer regime map is proposed and compared to the existing experimental data.