ESTIMATION OF LAGRANGIAN PARAMETERS FROM A DIFFUSION EXPERIMENT

被引：3

作者：

DEGRAZIA, GA

MORAES, OLL

GOEDERT, J

机构：

[1] Departmento de Física, Universidade Federal de Santa Maria, Santa Maria, 97119, RS

[2] Departmento de Física, Universidade Federal do Rio Grande do Sul, Porto Alegre, 91500, RS

来源：

NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA C-GEOPHYSICS AND SPACE PHYSICS | 1991年 / 14卷 / 06期

关键词：

homogeneous turbulence; Isotropic turbulence; Meteorology; Turbulent flows; convection; and heat transfer;

D O I：

10.1007/BF02507389

中图分类号：

学科分类号：

摘要：

Taylor's statistical theory in the limits of small and large diffusion times is used to assess the Lagrangian parameters of a local atmospheric turbulence. Experimental data, representing the dispersion of tracers in the atmosphere, are examined in order to derive the values of the local turbulence parameters pertaining to the Hanford-67 (Nickola P. W., 1977) experiment. Once determined, these Lagrangian parameters allow for a renormalization of the lateral dispersion as a function of time, that exhibits data dispersion smaller by two to three orders of magnitude, as compared to that obtained by normalization through the use of corresponding Eulerian parameters. This closer packing of the experimental data allows for a more precise fitting of a theoretical curve that is basic to the determination of local Lagrangian velocity autocorrelation coefficients.

引用

页码：615 / 621

页数：7

共 10 条

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