The prediction of turbulent jets and plumes by use of the kW model of turbulence
Abstract
A buoyancyextended version of the kW model of turbulence is presented for calculating the flow in turbulent jets and plumes in uniform or stratified ambients. Differential transport equations are solved for the turbulence kinetic energy, the mean square vorticity fluctuations, and the mean square temperature fluctuations. The model incorporates an algebraic stress closure for the turbulent shear stress, and the crossstream turbulent heat flux is calculated by means of a prescribed constant value of turbulent Prandtl number. The vertical turbulent heat flux is evaluated by relating this quantity not to the gradients, but to the local values of turbulence kinetic energy and mean square temperature fluctuations. Some additional calculations are reported where the crossstream turbulent heat flux is calculated from an algebraic heatflux closure. The turbulence model is applied to the calculation of selfsimilar jets and plumes, and also to forced plumes in uniform and stratified environments. The results are compared with the available experimental data and are found to be in good agreement with the measurements.
 Publication:

PhysicoChemical Hydrodynamics
 Pub Date:
 1984
 Bibcode:
 1984PhChH...5..153S
 Keywords:

 Buoyancy;
 Mathematical Models;
 Plumes;
 Prediction Analysis Techniques;
 Turbulence Models;
 Turbulent Jets;
 Axisymmetric Flow;
 Differential Equations;
 Kinetic Energy;
 Steady Flow;
 Two Dimensional Flow;
 Vorticity;
 Fluid Mechanics and Heat Transfer