PRESSURE SPECTRA FOR VORTEX MODELS OF FINE-SCALE HOMOGENEOUS TURBULENCE

被引：8
|
作者：
PULLIN, DI
机构：
[1] Graduate Aeronautical Laboratories 105-50, California Institute of Technology, Pasadena
来源：
PHYSICS OF FLUIDS | 1995年 / 7卷 / 04期
关键词：
D O I：
10.1063/1.868608
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Pressure spectra at large wave numbers are calculated for Lundgren-Townsend vortex models of the fine scales of homogeneous turbulence. Specific results are given for the Burgers vortex and also for the Lundgren-strained spiral vortex. For the latter case, it is found that the contribution to the shell-summed spectrum produced by the interaction between the axisymmetric and nonaxisymmetric components of the velocity field is proportional to k- 7/3 (k=|k| is the modulus of the wave number) in agreement with Kolmogorov-type dimensional arguments. Numerical estimates of the dimensionless prefactors for this component are obtained in Kolmogorov scaling variables and comparisons are made with results from the Batchelor-Kolmogorov theory, and with experimental measurement. © 1995 American Institute of Physics.
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页码：849 / 856
页数：8
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