Accession Number : ADA317609

Title :   Developing New Generation of Models for Turbulent Flows.

Descriptive Note : Final rept. 1 Jun 93-31 Aug 96,

Corporate Author : YALE UNIV NEW HAVEN CT

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

PDF Url : ADA317609

Report Date : 15 AUG 1996

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. 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 :   *TURBULENCE, SIGNAL PROCESSING, COMPUTERIZED SIMULATION, STOCHASTIC PROCESSES, TURBULENT FLOW, TURBULENT BOUNDARY LAYER, CHANNEL FLOW, REYNOLDS NUMBER, BOUNDARY LAYER FLOW.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE