Analysis and Modeling of Buoyancy Generated Turbulence using Numerical Data.

Abstract

Rayleigh-Bernard convection offers a unique flow situation in which buoyancy-generated turbulence can be studied in isolation, free of the complicating influence of shear production of turbulence. The objective of this paper is to examine and model important aspects of buoyancy-generated turbulence using direct numerical simulation (DNS) data of Rayleigh-Bernard convection. In particular, we examine the pressure-strain and pressure temperature-gradient correlations, turbulent transport of Reynolds stress, and assumptions pertaining to algebraic modeling of thermal flux and Reynolds stress.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1997
Accession Number
ADA329467

Entities

People

  • Sharath S. Girimaji
  • Sivaramakrishnan Balachandar

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Boltzmann Equation
  • Boundary Layer
  • Buoyancy
  • Computational Fluid Dynamics
  • Convection
  • Differential Equations
  • Diffusion
  • Engineering
  • Equations
  • Kinetic Energy
  • Layers
  • Mathematics
  • Pressure Gradients
  • Reynolds Number
  • Simulations
  • Temperature Gradients
  • Turbulent Flow

Readers

  • Fluid Mechanics and Fluid Dynamics.
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