Abstract
An experimental and analytical study was conducted on a fully developed turbulent flow in a square duct, two opposite walls of which had been roughened. The flow was measured by means of a hot-wire anemometer. The calculation was performed with the k model and with the k and e model coupled to the algebraic stress model developed by Launder and Ying. The results of the calculation are compared with the measurements. In this duct, a result hitherto unobserved became apparent: namely, there were four relatively large longitudinal vortices. A prediction of heat transfer was also performed under conditions of a constant wall-temperature and a calculated flow field.
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