Calculations of axisymmetric turbulent jets by the pdf method
Abstract
The probability density function (pdf) method is applied to calculate the flow field of two concentric jets issuing into stagnant surroundings. A modeled transport equation for the turbulence frequency is proposed and solved, in contrast to previous studies with the pdf method that assume the frequency to be constant across the flow. This results in a significant improvement in the agreement of the model predictions with experimental data. Other aspects of the modeling are investigated, including the modeling of intermittency, the effect of the universal constant in the Langevin model for velocities, and the assumption of a coflow for the simulations.
 Publication:

7th Symposium on Turbulent Shear Flows, Volume 1
 Pub Date:
 1989
 Bibcode:
 1989tsf.....1....3A
 Keywords:

 Axisymmetric Flow;
 Flow Distribution;
 Probability Density Functions;
 Turbulence Models;
 Turbulent Jets;
 Flow Velocity;
 Intermittency;
 Langevin Formula;
 Transport Theory;
 Fluid Mechanics and Heat Transfer