Accession Number : ADA332885

Title :   Developing New Generation of Models for Turbulent Flows

Descriptive Note : Final rept. 1 Mar 93-30 Jun 97

Corporate Author : YALE UNIV NEW HAVEN CT

Personal Author(s) : Sreenivasan, K. R.

PDF Url : ADA332885

Report Date : 15 AUG 1997

Pagination or Media Count : 10

Abstract : The goal of the study was to generate, from a simple set of rules, a stochastic signal in space-time that would closely resemble the real turbulent data. This goal has been achieved and the work is reported in a journal article (Phys. Rev. E. 49, 5179, 1994) and Chapter 4.4 of the Ph.D thesis by A. Juneja (May 1995). The paper explains the principles and deals with one dimensional signals whereas the thesis chapter deals with three dimensional signals. These synthetic signals possess most of the statistical properties of real turbulence, and have been used as initial conditions in a direct numerical simulation of homogeneous turbulence. A comparable scheme was attempted for wall bounded flows, and the principal hypothesis relating to this attempt was successfully verified in a high-Reynolds-number turbulent pipe flow and a moderate-Reynolds-number turbulent boundary layer.

Descriptors :   *TURBULENT FLOW, SIGNAL PROCESSING, STOCHASTIC PROCESSES, TURBULENCE, TURBULENT BOUNDARY LAYER, REYNOLDS NUMBER.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE