Accession Number : ADA329467

Title :   Analysis and Modeling of Buoyancy Generated Turbulence using Numerical Data.

Descriptive Note : Research paper,

Corporate Author : INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA

Personal Author(s) : Girimaji, Sharath S. ; Balachandar, S.

PDF Url : ADA329467

Report Date : SEP 1997

Pagination or Media Count : 35

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.

Descriptors :   *TURBULENT FLOW, *BUOYANCY, MATHEMATICAL MODELS, ALGEBRA, TEMPERATURE GRADIENTS, SHEAR STRESSES, CORRELATION TECHNIQUES, HEAT FLUX, MOMENTUM TRANSFER.

Subject Categories : Numerical Mathematics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE