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

• Published in: International journal of heat and mass transfer Vol. 51; no. 13; pp. 3259 - 3266
• Main Authors: Lee, J.I., Hejzlar, P., Saha, P., Stahle, P., Kazimi, M.S., McEligot, D.M.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.07.2008; Elsevier
• Subjects: Acceleration; Applied sciences; Buoyancy; Deteriorated turbulent heat transfer; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Heat transfer; Theoretical studies. Data and constants. Metering; Acceleration; Buoyancy; Deteriorated turbulent heat transfer; Temperature distribution; Nusselt number; Flow regime; Carbon dioxide; Upward flow; Circular pipe; Nitrogen; Experimental study; Helium; Heat transfer
• ISSN: 0017-9310; 1879-2189
• DOI: 10.1016/j.ijheatmasstransfer.2008.03.021

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 K v 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.