Suscripción a Biblioteca: Guest

ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

TYPICAL HEAT TRANSFER AND FLOW REGIMES IN THE INDUCED MIXED CONVECTION PHENOMENON

Get access (open in a dialog) DOI: 10.1615/IHTC11.3180
pages 281-286

Sinopsis

In the present work we focus our attention on the Opposed Induced Mixed Convection (OIMC) case, i.e. the thermal and the flow fields developed by heating circumferencially a vertical tube closed at its bottom and open at the top to a large reservoir. The paper presents experimental and numerical studies of this complex heat transfer process. Two different experimental apparatus were built. The first was a flow visualization apparatus, with water as the working fluid, while the second apparatus enabled quantitative measurements of the temperature field in air. All the experiments were performed in the turbulent flow regime. The visualization tests were conducted at three different length to diameter ratios (L/d%l,5,10). The cylinder wall temperatures, as well as the radial and axial temperature profiles of the air within the cylinder, were measured in the air apparatus. A qualitative good agreement was found between the simulation results, describing the flow and temperature field and the experimental observations. Based on the simulation results, the visualization and the measured temperature profiles, it was found that the OIMC can be characterized by three main regimes.