RT Journal Article ID 6d16224a1b215284 A1 Dagdevir, Toygun A1 Keklikcioglu, Orhan A1 Ozceyhan, Veysel T1 THE EFFECT OF CHAMFER LENGTH ON THERMAL AND HYDRAULIC PERFORMANCE BY USING Al2O3-WATER NANOFLUID THROUGH A SQUARE CROSS-SECTIONAL DUCT JF Heat Transfer Research JO HTR YR 2019 FD 2019-07-15 VO 50 IS 12 SP 1183 OP 1204 K1 heat transfer enhancement K1 thermal and hydraulic performance K1 Al2O3–water nanofluid K1 chamfer length AB The effect of chamfer length c and nanoparticle volume fraction q on heat transfer and fluid flow is investigated numerically for water-Al2O3 nanofluid flow through various chamfered ducts of square cross section. A mixture model is used for the nanofluid flow analyses based on the finite volume method. Chamfer lengths of the ducts are assumed to be 1.0, 2.0, 3.0 and 4.0 mm; and the volume fraction of Al2O3 nanoparticles, where diameter is 10 nm, are considered as 0.01, 0.02, and 0.03. The fluid flow is examined under turbulent flow conditions (4000 ≤ Re ≤ 10,000). The results show that as the nanoparticle volume fraction increases, heat transfer and pressure drop increase in all the cases considered. Moreover, increasing the chamfer length of the duct has a positive effect on convective heat transfer, despite the negative effect on the pressure drop. The highest thermohydraulic performance is obtained as 1.118 for the case of c = 4 mm, φ = 0.03, and Re = 4000. PB Begell House LK https://www.dl.begellhouse.com/journals/46784ef93dddff27,7f37ee020fed19d8,6d16224a1b215284.html