Test of Large Eddy Simulation in Complex Flow with High Schmidt Number

机译：高施密特数的复杂流动大涡模拟试验

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Turbulent concentration field with Sc=50 was investigated via large eddy simulation. Dynamic mixed model for the passive scalar was tested in a strong shear layer. Both mean and rms eddy diffusivities were shown to be reduced in the middle of the channel as the Schmidt number becomes large. A sudden increase of SGS turbulent Prandtl number in the vicinity of the wall suggests that more careful choice of filter size is required to capture the subgrid-scale dynamics correctly in this region when analyzing high Schmidt number flow.

机译：通过大涡模拟研究了Sc = 50的湍流浓度场。在强剪切层中测试了被动标量的动态混合模型。随着Schmidt数变大，平均和均方根涡流扩散率均在通道中间减小。壁附近的SGS湍流Prandtl数突然增加表明，在分析高Schmidt数流时，需要更谨慎地选择过滤器尺寸，以正确捕获该区域的亚网格规模动态。

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来源
《International Conference on Computational Science and Its Applications(ICCSA 2006) pt.5; 20060508-11; Glasgow(GB)》|2006年|P.476-483|共8页
会议地点 Glasgow(GB)
作者
Yang Na; Seungmin Lee;
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作者单位

CAESIT, Dept. of Mechanical Engineering, Konkuk University, Hwayang-dong 1, Gwangjin-gu, Seoul 143-701, Korea;

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原文格式 PDF
正文语种 eng
中图分类计算技术、计算机技术;
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Test of Large Eddy Simulation in Complex Flow with High Schmidt Number

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