Developing New Generation of Models for Turbulent Flows

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.

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Document Details

Document Type
Technical Report
Publication Date
Aug 15, 1997
Accession Number
ADA332885

Entities

People

  • K. R. Sreenivasan

Organizations

  • Yale University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Brownian Motion
  • Channel Flow
  • Energy Transfer
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Layers
  • Mechanical Engineering
  • Pipe Flow
  • Probability
  • Random Variables
  • Reynolds Number
  • Simulations
  • Three Dimensional
  • Turbulent Flow

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Fluid Mechanics and Fluid Dynamics.
  • Theoretical Analysis.

Technology Areas

  • Space