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    A cfd investigation of al 2 o 3 /water flow in a duct having backward-facing step
    (2019) Ekıcıler, R.; Aydeniz, E.; Arslan, K.
    Al 2 O 3 /water forced convection nanofluid flow was numerically studied in a duct with backward-facingstep. Nanoparticle volume fraction was changed between 1%-5%. Diameter of nanoparticle was constant (d p =40nm). The Reynolds number was increased from 100 to 500. The step and total height of the duct were 4.8 mmand 9.6 mm, respectively. The bottom wall, which was positioned after the step, was heated with 2000 W/m 2 andthe rest of the walls were adiabatic. Nusselt number, velocity profiles and friction factor were investigated indetail. It was obtained that Nusselt number increases with increasing nanoparticle volume fraction and Reynoldsnumber.
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    A CFD INVESTIGATION OF Al2O3/WATER FLOW IN A DUCT HAVING BACKWARD-FACING STEP
    (Yildiz Technical Univ, 2019) Ekiciler, R.; Aydeniz, E.; Arslan, K.
    Al2O3/water forced convection nanofluid flow was numerically studied in a duct with backward-facing step. Nanoparticle volume fraction was changed between 1%-5%. Diameter of nanoparticle was constant (d(p)=40 nm). The Reynolds number was increased from 100 to 500. The step and total height of the duct were 4.8 mm and 9.6 mm, respectively. The bottom wall, which was positioned after the step, was heated with 2000 W/m(2) and the rest of the walls were adiabatic. Nusselt number, velocity profiles and friction factor were investigated in detail. It was obtained that Nusselt number increases with increasing nanoparticle volume fraction and Reynolds number.
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    A CFD investigation of Al2O3water flow in a duct having backward facing step
    (Yildiz Technical University, 2019) Ekiciler, R.; Aydeniz, E.; Arslan, K.
    Al2O3water forced convection nanofluid flow was numerically studied in a duct with backward facing step. Nanoparticle volume fraction was changed between 5%. Diameter of nanoparticle was constant (dp=40 nm). The Reynolds number was increased from 100 to 500. The step and total height of the duct were 4.8 mm and 9.6 mm, respectively. The bottom wall, which was positioned after the step, was heated with 2000 W/m2 and the rest of the walls were adiabatic. Nusselt number, velocity profiles and friction factor were investigated in detail. It was obtained that Nusselt number increases with increasing nanoparticle volume fraction and Reynolds number. © 2019 Yildiz Technical University.
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    The effect of volume fraction of Sio2 nanoparticle on flow and heat transfer characteristics in a duct with corrugated backward-facing step
    (Serbian Society of Heat Transfer Engineers, 2018) Ekiciler, R.; Aydeniz, E.; Arslan, A.K.
    In this paper, flow and heat transfer characteristics of SiO2-water nanofluid flow over a corrugated backward-facing step are numerically investigated. The nu-merical study is performed by solving governing equations (continuity, momen-tum, and energy) with finite volume method. The duct inlet and step heights are 4.8 mm. The expansion ratio is 2. The upstream wall, Lu, and downstream wall, Ld, lengths are 48 cm and 96 cm, respectively. The downstream wall of the duct is subjected to a constant and uniform heat flux of 2000 W/m2. The ranges of the volume fraction of nanoparticles and Reynolds number are 0%-3.0% and 135-240, respectively. The effects of the volume fraction of nanoparticles on the average Nusselt number, average Darcy friction factor, and velocity distribution are investigated under laminar forced convective nanofluid flow condition. It is revealed that the nanoparticle volume fraction substantially influences the heat transfer and flow characteristics. The volume fraction of 3.0% shows the highest heat transfer performance. © 2018 Society of Thermal Engineers of Serbia.