On the scaling of impulsively started incompressible turbulent round jets
Abstract
A scaling law is reported for transient, turbulent, incompressible round jets. Numerical solutions of the NavierStokes equations are obtained using a kepsilon model for turbulence. The constants of the kepsilon model are optimized by comparing the computed centerline velocity, mean radial velocity distribution, and longitudinal kinetic energy distributions with those measured by other authors in steady round jets. The resulting constants are the ones also used in computations of steady planar jets except for the one that multiplies the source term in the epsilon equation. After optimization, the agreement is found to be satisfactory for all mean quantities but is still rather poor for the kinetic energy distribution.
 Publication:

ASME Journal of Fluids Engineering
 Pub Date:
 June 1982
 Bibcode:
 1982ATJFE.104..191K
 Keywords:

 Computational Fluid Dynamics;
 Incompressible Flow;
 Scaling Laws;
 Turbulent Jets;
 Equilibrium Flow;
 KEpsilon Turbulence Model;
 NavierStokes Equation;
 Fluid Mechanics and Heat Transfer