Predictions of axisymmetric and two-dimensional impinging turbulent jets

✍ Scribed by M. Dianat; M. Fairweather; W.P. Jones

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 831 KB
• Volume: 17
• Category: Article
• ISSN: 0142-727X
• DOI: 10.1016/s0142-727x(96)00076-8

✦ Synopsis

The ke turbulence model and a version of a second-moment closure, modified to include the effect of pressure reflections from a solid surface, have been used as the basis of predictions of the flow that results from the orthogonal impingement of circular and two-dimensional (2-D) jets on a flat surface. Comparison of model predictions has been made with velocity measurements obtained in the stagnation and wall jet regions of the impinging flows. Results, in general, confirm the superiority of the Reynolds stress transport equation model for predicting mean and fluctuating velocities within the latter regions of such flows. In particular, modifications to the second-moment closure to account for the influence of the surface in distorting the fluctuating pressure field away from the wall successfully predict the damping of normal-to-wall velocity fluctuations throughout the impinging flows. In contrast, results derived from the eddy-viscosity-based approach do not, in general, accurately reproduce experimental observations.