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

Abstract

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 x 10(-5) and (3) inlet acceleration parameter K-v up to 5 x 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. (c) 2008 Elsevier Ltd. All rights reserved.