Accession Number : ADA454777


Title :   Filtered Mass Density Function for Subgrid Scale Modeling of Turbulent Diffusion Flames


Descriptive Note : Final technical rept. 1 Jan 2003-31 Dec 2005


Corporate Author : PITTSBURGH UNIV PA DEPT OF MECHANICAL ENGINEERING


Personal Author(s) : Givi, P ; Sheikhi, M R ; Drozda, T G ; Madnia, C K


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a454777.pdf


Report Date : 27 Aug 2005


Pagination or Media Count : 46


Abstract : This research was primarily concentrated on the following issues: (1) development of the joint velocity-scalar filtered density function for subgrid scale (SGS) closure of turbulent combustion; and (2) implementation of the scalar filtered density function for large eddy simulation of complex turbulent flames. An extensive systematic study was performed and resulted in significant new findings. With regard to (1), a modelled transport equation was developed and solved for the joint density function. The predicted results via this model were more accurate than other existing SGS models. With regard to (2), the model was employed for prediction of a piloted jet diffusion flame and a bluff-body stabilized flame. The predicted results compared very well with experimental data.


Descriptors :   *TURBULENCE , *EDDIES(FLUID MECHANICS) , *COMBUSTION , *FLAMES , *FILTERS , SIMULATION , NORMAL DENSITY FUNCTIONS , EQUATIONS , EXPERIMENTAL DATA , TRANSPORT PROPERTIES , DIFFUSION , SCALAR FUNCTIONS


Subject Categories : Fluid Mechanics
      Combustion and Ignition


Distribution Statement : APPROVED FOR PUBLIC RELEASE