To improve the computational efficiency of Lattice Boltzmann Method (LBM), inthis paper, LBM with doule meshes is presented, whose basic ideology is borrowed from the FiniteDifference Method (FDM). Taking merits of bo...To improve the computational efficiency of Lattice Boltzmann Method (LBM), inthis paper, LBM with doule meshes is presented, whose basic ideology is borrowed from the FiniteDifference Method (FDM). Taking merits of both the coarse and fine meshes, the presented methodspeeds up the convergence, and increases the computational efficiency. Three numerical examples,two-dimensional Poiseuille flow, backward-facing step flow and flow in channel with a rectangularslot, are illustated, proving that time cost by double-mesh LBM is much less than that by commonlyused u-niform-mesh LBM, and the results obtained are correct and dependable.展开更多
In this work a novel anode configuration consisting of an iron mesh double layer is proposed for the electrochemical treatment of wastewater. The removal of Reactive Black 5 dye（RB5） from synthetic contaminated wate...In this work a novel anode configuration consisting of an iron mesh double layer is proposed for the electrochemical treatment of wastewater. The removal of Reactive Black 5 dye（RB5） from synthetic contaminated water was used as a model system. At a constant anode surface area, identical process operating parameters and batch process mode, the iron mesh double layer electrode showed better performance compared to the conventional single layer iron mesh. The double layer electrode was characterized by RB5 and chemical oxygen demand（COD） removal efficiency of 98.2% and 97.7%, respectively, kinetic rate constant of 0.0385/min, diffusion coefficient of 4.9 × 10^（-5）cm^2/sec and electrical energy consumption of 20.53 kWh/kgdye removed. In the continuous flow system, the optimum conditions suggested by Response Surface Methodology（RSM） are： initial solution p H of 6.29,current density of 1.6 m A/cm^2, electrolyte dose of 0.15 g/L and flow rate of 11.47 m L/min which resulted in an RB5 removal efficiency of 81.62%.展开更多
文摘To improve the computational efficiency of Lattice Boltzmann Method (LBM), inthis paper, LBM with doule meshes is presented, whose basic ideology is borrowed from the FiniteDifference Method (FDM). Taking merits of both the coarse and fine meshes, the presented methodspeeds up the convergence, and increases the computational efficiency. Three numerical examples,two-dimensional Poiseuille flow, backward-facing step flow and flow in channel with a rectangularslot, are illustated, proving that time cost by double-mesh LBM is much less than that by commonlyused u-niform-mesh LBM, and the results obtained are correct and dependable.
基金the financial support provided by the High Impact Research Grant UM.C/HIR/MOHE/ENG/43the Bright Sparks Program which made this research possible
文摘In this work a novel anode configuration consisting of an iron mesh double layer is proposed for the electrochemical treatment of wastewater. The removal of Reactive Black 5 dye（RB5） from synthetic contaminated water was used as a model system. At a constant anode surface area, identical process operating parameters and batch process mode, the iron mesh double layer electrode showed better performance compared to the conventional single layer iron mesh. The double layer electrode was characterized by RB5 and chemical oxygen demand（COD） removal efficiency of 98.2% and 97.7%, respectively, kinetic rate constant of 0.0385/min, diffusion coefficient of 4.9 × 10^（-5）cm^2/sec and electrical energy consumption of 20.53 kWh/kgdye removed. In the continuous flow system, the optimum conditions suggested by Response Surface Methodology（RSM） are： initial solution p H of 6.29,current density of 1.6 m A/cm^2, electrolyte dose of 0.15 g/L and flow rate of 11.47 m L/min which resulted in an RB5 removal efficiency of 81.62%.
