Analysis and modeling of subgrid scalar mixing using numerical data
Analysis and modeling of subgrid scalar mixing using numerical data
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DOI：
10.1063/1.868894
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发表时间：
1996-05-01
影响因子：
4.6
通讯作者：
Zhou, Y
中科院分区：
文献类型：
--
作者：
Girimaji, SS;Zhou, Y
各向同性湍流中被动标量混合的直接数值模拟 (DNS) 用于研究、分析并随后对小尺度（子网格）在混合过程中的作用进行建模。特别是，我们尝试通过将子网格尺度引起的大规模（超网格）标量波动的耗散分解为两部分来对其耗散进行建模：（i）由于子网格尺度之间的相互作用而产生的影响，E（phi）（>）；以及，(ii) 由于超级网格和次网格尺度之间的相互作用而产生的影响，E(phi)(>
Direct numerical simulations (DNS) of passive scalar mixing in isotropic turbulence is used to study, analyze, and, subsequently, model the role of small (subgrid) scales in the mixing process. In particular, we attempt to model the dissipation of the large-scale (supergrid) scalar fluctuations caused by the subgrid scales by decomposing it into two parts: (i) the effect due to the interaction among the subgrid scales, E(phi)(>); and, (ii) the effect due to interaction between the supergrid and the subgrid scales, E(phi)(>