Combined convective and radiative heat transfer in side-vented open cavities

✍ Scribed by N. Ramesh; W. Merzkirch

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 471 KB
• Volume: 22
• Category: Article
• ISSN: 0142-727X
• DOI: 10.1016/s0142-727x(00)00080-1

✦ Synopsis

Steady, combined laminar natural convection and surface radiation heat transfer from side-vented open cavities with top opening have been studied for dierent aspect ratios, surface emissivities and side-vents, using air as the medium. A single, isothermal, heated vertical wall formed the heat source for the cavity, and all other walls were insulated. An optical measurement technique using a shearing interferometer with two Wollaston prisms was used to obtain local values of the convective heat transfer coecient along the heated wall of the cavity. The radiative heat transfer rates were estimated by a numerical procedure, by means of enclosure analysis using the radiosity-irradiation formulation. Parametric studies, for a range of parameters of practical interest, were carried out to understand the eect of interaction of surface radiation on natural convection. Results of a large number of systematic, controlled experiments that were carried out are presented, highlighting the eect of interaction.