Direct numerical simulation of passive scalar in decaying compressible turbulence

被引：6

作者：

Li, XL ^{[1
]}

Fu, DX ^{[1
]}

Ma, YW ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Mech, State Key Nonlinear Mech, Beijing 100080, Peoples R China

来源：

SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY | 2004年 / 47卷 / 01期

基金：

中国国家自然科学基金;

关键词：

passive scalar; decaying compressible turbulence; direct numerical simulation;

D O I：

10.1360/03yw0029

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The passive scalars in the decaying compressible turbulence with the initial Reynolds number (defined by Taylor scale and RMS velocity) Re=72, the initial turbulent Mach numbers (defined by RMS velocity and mean sound speed) Mt=0.2-0.9, and the Schmidt numbers of passive scalar Sc=2-10 are numerically simulated by using a 7th order upwind difference scheme and 8th order group velocity control scheme. The computed results are validated with different numerical methods and different mesh sizes. The Batchelor scaling with k(-1) range is found in scalar spectra. The passive scalar spectra decay faster with the increasing turbulent Mach number. The extended self-similarity (ESS) is found in the passive scalar of compressible turbulence.

引用

页码：52 / 63

页数：12

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