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传热学
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传热学

DOI: 10.1615/HeatTransRes.v36.i4.30
pages 281-294

Calculation of the Statistical Characteristics of a Turbulent Flow Subjected to the Action of External Forces

Valery A. Babenko
A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, Minsk, Belarus
Yu. V. Zhukova
Turbulence Laboratory, A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, P. Brovka Str. 15, 220072 Minsk, Belarus
J. Hierro
University of Zaragoza, Spain

ABSTRACT

The statistical characteristics of isotropic fields of velocity and scalar are studied for the case of the presence of external pumping of the kinetic energy of turbulence. Two models of distributions of the kinetic energy of turbulence and intensity of fluctuations of the scalar field over the spectra of wave numbers and scales of lengths are considered. These models are used to calculate dispersions, rates of dissipation, and several third-order moments of the velocity and scalar fields. Both models are tested by comparing them with each other and with the data of direct numerical modeling performed for the same conditions.


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