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Xflow 2013 壁面和尾流自适应加密算法和效率改进

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Xflow 2013 V90 在算法和效率方面有最新的改进,大大提高了Xflow求解流体问题的能力,这些改进包括:


1)尾流自适应加密算法优化,提高25%计算效率 (Wake refinement algorithm optimization)

New refinement/de-refinement scheme: up to 25% computational time saved!

Cells that are refined based on their vorticity respect the refinement transition length parameter, thus avoiding the case where cells with more than one level of difference were in close contact, ensuring the 2:1 balance condition and simplifying the interpolation procedure, which improves the speed of the code.

The wake now has several levels of refinement, and the fine resolution is only used where the vorticity is really high. It therefore requires higher wake refinement threshold to reach at the same number of elements

The automatic wake refinement threshold is therefore now set to 0.1, which should provide an equivalent number of elements to previous versions. Furthermore, the automatic wake refinement should now work for both high and small scales!



2)流场计算初始化阶段的壁面和尾流自适应能力增强 (Initial refinement based on vorticity available for the near walls and wake refinement)