Abstract: In this study, turbulent convection heat transfer and pressure drop from a surface equipped with perforated fins with square cross section were investigated numerically. At constant clearance ratio (C/H=0), the pin-fin spacing ratio in stream wise direction (Sy/D=1.208, 1.944 and 3.4) and the Reynolds number (Re=13.500, 27.500 and 42.000) on heat transfer and pressure drop were examined. RNG based k-ε turbulent model and SIMPLE algorithm were used for governing equations. A constant heat flux of 3200 W/m2 was applied to the base of pin-fins. The results of the heat transfer and pressure drop characteristics with respect to appropriate variables were presented. The heat transfer increased with increasing Reynolds number and with decreasing clearance ratio and spacing ratio. The fin height of H=100 mm, the spacing ratio of Sy/D=1.208 and the Reynolds number of Re=42.000 were better for cooling processes. The best overall heat transfer enhancement was obtained in the case of Sy/D=1.208, C

• Publication Date: 02-Jun-2014
• DOI: 10.15224/978-1-63248-012-5-79
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Abstract: Self compacting concrete (SCC) is a new, innovative technology which represents one of the most significant advances in concrete technology during the last two decades. The use of SCC for the production of hollow core slabs (HCS) is proposed to allow for placing shear reinforcement in deep HCS. However, many researchers have expressed concern that SCC could negatively affect the hardened properties such reductions in the modulus of elasticity as well as shear strength and bond between concrete and steel strands. This paper presents development work on the manufacture of HCS using SCC. Preliminary results of short-term flexure testing of full-scale HCS members made using SCC and conventional dry cast concrete (DCC) are presented and discussed.

• Publication Date: 02-Jun-2014
• DOI: 10.15224/978-1-63248-012-5-80
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