High-Reynolds-number simulation of turbulent mixing
High-Reynolds-number simulation of turbulent mixing
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DOI：
10.1063/1.2001690
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发表时间：
2005-08
影响因子：
4.6
通讯作者：
P. Yeung;D. Donzis;K. Sreenivasan
中科院分区：
文献类型：
--
作者：
P. Yeung;D. Donzis;K. Sreenivasan
简要报告了一个新的20483直接数值模拟的被动标量的混合均匀平均梯度强迫，定常各向同性湍流。泰勒尺度雷诺数接近700，考虑施密特数为1和1 scin8。这些数据提供了迄今为止最有说服力的证据的惯性对流标度。在常规测量中，小尺度各向同性的显著偏离是持续的。根据一些严格的分辨率要求，数据表明，通常观察到的能量和标量耗散率的不稳定性之间的差异可能部分是有限雷诺数效应。
A brief report is given of a new 20483 direct numerical simulation of the mixing of passive scalars with uniform mean gradients in forced, stationary isotropic turbulence. The Taylor-scale Reynolds number is close to 700 and Schmidt numbers of 1 and 1∕8 are considered. The data provide the most convincing evidence to date for the inertial-convective scaling. Significant departures from small-scale isotropy are sustained in conventional measures. Subject to some stringent resolution requirements, the data suggest that commonly observed differences between the intermittency of energy and scalar dissipation rates may in part be a finite-Reynolds-number effect.