Akademik Veri Yönetim Sistemi
14th International Conference on Computational Heat and Mass Transfer, ICCHMT 2023, Düsseldorf, Almanya, 4 - 08 Eylül 2023, ss.681-691, (Tam Metin Bildiri)
Flow and heat transfer characteristics are investigated numerically flow over heated dimpled surface at turbulent flow conditions in a rectangular channel. Both circular and oval dimples are used together for heated dimple surface in a staggered arrangement. In numerical calculations, the finite volume method is used. Three different dimple depth to diameter ratios (0.067, 0.1 and 0.2), two different longitudinal distances (21.6 mm and 24 mm), and one oval dimple angle (30º) are considered. The range of Reynolds number is between 10000 and 60000. Validation study is done with experimental results at Re = 50500, flow and heat transfer over circular dimples in a staggered arrangement with three depths to diameter ratios of 0.067, 0.1 and 0.2. Friction factor f, friction factor ratio f/f0, total Nusselt number Nutotal and Nusselt number ratio Nutotal/Nu0 values are acquired according to Reynolds number. As the depth to diameter ratio increases, all parameters increases except performance. While longitudinal distance increases, all parameters decreases. Reynolds number has strong influence an all parameters.