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This paper is concerned with a mathematical model for simulating hydrodynamics of 2D circular dam-break flows with the WENO scheme and the Finite Volume Method. The time discretization uses the Runge-Kutta TVD scheme. By using the proposed model, we calculated the flow property of circular dam-break, and obtained the flow velocity field distributions. The calculated results show that the WENO scheme has higher accuracy and better stability, and has the ability to automatically capture shock waves, and may suppress the oscillations of numerical solution. This model can effectively simulate the hydrodynamics of 2D river flow with irregular boundaries.

Tungsten oxide thin films with different stoichiometry have been deposited on In2O3 : SnO2 glass (ITO) and Si wafer by pulsed laser deposition (PLD) technique at different deposition temperatures and oxygen pressure. The structural properties of WO3 thin films were analyzed by using a scanning accessory of transmission electron microscope (STEM), X-ray diffraction (XRD), Fourier transform infrared spectrum (FT-IR), Raman spectrum (RS). Thin films deposited at 200 °C on ITO showed amorphous structure, those deposited at 300 and 400 °C on ITO showed nanocrystalline triclinic structure. As for samples deposited at 400 °C, in which the crystals keep nanocrystalline, cyclic voltammograms at sweep rate of 50 mV/s shows that no long-term degradation was noted at least up to 1000 cycles, and durability was verified to 8000 cycles in the voltage range between —1.2 and 1.4 V. Its open and porous structure is suitable for Li-ions going into and out, and induced improved cycle stability and reversibility.