Accession Number : ADA181494

Title :   Zonal Models For Incompressible Flows.

Descriptive Note : Annual progress rept. 1 Jan-31 Dec 86,

Corporate Author : STANFORD UNIV CA DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Kline,S. J. ; Ferziger,J. H.

Report Date : 28 FEB 1987

Pagination or Media Count : 7

Abstract : A successful Unified Zonal model has been created for the entire class of free-shear flows (wakes, jets, and mixing layer) by S. Tzuoo working with J. H. Kline. Results check data within 10% for all well-documented cases including the near and far fields and planar and axisymmetric cases. Programs run in a few minutes in a VAX. The solution provides, for the first time, a sufficient set of non-dimensional governing parameters for the entire class of flows and thus provides both a single model and improved understanding of the physics of free-shear flows. As a class for flows, free shear flows are important in jet engines, combustion systems, separated flows and many other applications. Adequate solutions for the near field of any of these flows has not been available previously even though most applications are in the near field region. Consideration of the processes used suggests that the zonal methods developed will generalize successfully to many other flow types. Keywords: Turbulence; Free-shear layers: computer modeling; Zonal modeling; Mathematical models.

Descriptors :   *INCOMPRESSIBLE FLOW, *TURBULENCE, COMBUSTION, COMPUTERIZED SIMULATION, FAR FIELD, FLOW, FLOW SEPARATION, JET ENGINES, LAYERS, MATHEMATICAL MODELS, MIXING, MODELS, NEAR FIELD, SHEAR PROPERTIES, WAKE, JET FLOW, AXISYMMETRIC

Subject Categories : Fluid Mechanics
      Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE