HEAT AND MASS TRANSFER IN TURBULENT FLOWS

CALCULATION OF THE STATISTICAL CHARACTERISTICS OF A TURBULENT FLOW UNDER THE ACTION OF EXTERNAL FORCES
V. A. Babenko and Yu. V. Zhukova UDC 532.517.4 A study is made of the statistical characteristics of isotropic velocity and scalar fields in supply of the kinetic energy of turbulence from the energy of the average flow. Two models based on the distributions of the kinetic turbulence energy and the intensity of scalar-field pulsations by wave numbers and length scales are used for calculation of the statistical characteristics of turbulent velocity and scalar fields. The calculation results are compared to the data of the direct numerical modeling performed under the same initial conditions. A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15 P. Brovka Str., Minsk, 220072, Belarus; email: svaturb@nsl.hmti.ac.by. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 79, No. 1, pp. 148-154, January-February, 2006. Original article submitted December 10, 2004.