为了能在不太密的网格上捕捉到流场的细致结构，通常采用高阶精度的差分格式进行数值模拟。
In order to capture the subtle structure in the flow field using not too dense grids, the high order accuracy difference schemes are often adopted in numerical simulations.
数值实验表明了该类格式的高阶精度和分辨率，且过间断基本无振荡。
Numerical results show their high-order accuracy and high resolution, and low oscillations across discontinuities.
本文提出了一种新的处理涡量边界条件的方法，并且应用了高阶精度的差分格式。
In this paper, the author advances a new method for handling the vorticity boundary condition and USES the higher order accurate schemes to solve the steam function-vorticity equation.
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