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4篇 您的检索式:作者名="Nowrouz"
    题名 作者 年代 出处 被引量
1DRAG REDUCTION IN A TURBULENT CHANNEL FLOW WITH HYDROPHOBIC WALL显示文摘This paper investigates a theoretical prediction of friction drag reduction in turbulent channel flow which is achieved by using superhydrophobic surfaces. The effect of the hydrophobic surface is considered to be a slip boundary condition on the wall, and this new boundary condition is added to Large Eddy Simulation (LES) equations. The predicted drag reduction at Reτ=180 is approximately 30%, which concurs with results obtained from Direct Numerical Simulation (DNS). An important implication of the present finding is that the near-wall turbulence structures are modified with streamwise slip velocity. In addition, a noticeable effect on the turbulence structure occurs when the slip length is greater than a certain value.NOURI Nowrouz Mohammad SEKHAVAT Setareh MOFIDI Alireza 2012Journal of Hydrodynamics2012,24,3:12
2Analysis of shear rate effects on drag reduction in turbulent channel flow with superhydrophobic wall显示文摘We examined the shear rate effect on drag reduction of superhydrophobic surfaces with different slip lengths.For this purpose,turbulent channel flow was considered at the friction Reynolds numbers of Re=180,395,500.By using Navier’s slip condition it is shown that increasing shear rate leads to the greater reduction in drag force and also more reduction occurs in larger slip length.Based on the results,more than 25%drag reduction happens at a friction Reynolds number of Re=500 for slip length of 1×10–5m.The simulation results suggest that reduction in drag force occurs because slip condition reduces the Reynolds stresses,also weakens vorticity filed and the near-wall coherent structures,and therefore turbulence production is decreased.NOURI Nowrouz Mohammad BAKHSH Mohammad Saadat SEKHAVAT Setareh 2013Journal of Hydrodynamics2013,25,6:5
3Feedforward versus recurrent neural networks for forecasting monthly japanese yen exchange rates显示文摘Giovani Dematos Milton S. Boyd Bahman Kermanshahi Nowrouz Kohzadi Iebeling Kaastra 1995Financial Engineering and the Japanese Markets1995,,1:1
4Optimization of FIR digital filters over the canonical signed-digit coefficient space u- sing genetic algorithms 显示文摘FULLER A T G NOWROUZ IAN B ASHRAFZADEH F 1998Digital Signal Processing1998,20,2:1
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