A pdf description of turbulent axisymmetric free jet flow

NCUIR > Engineering College > Graduate Institute of Mechanical Engineering > journal & Dissertation > Item 987654321/26907

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/26907

Title:	A pdf description of turbulent axisymmetric free jet flow
Authors:	Chen,MH;Hong,ZC
Contributors:	機械工程研究所
Keywords:	PROBABILITY DENSITY-FUNCTION;REYNOLDS-STRESS;SHEAR FLOWS;VELOCITY CORRELATION;EQUATION;MODEL
Date:	1999
Issue Date:	2010-06-29 18:02:59 (UTC+8)
Publisher:	中央大學
Abstract:	This study presents the application of a turbulence probability density function (pdf) equation to compute an axisymmetric turbulent free jet flow. II; view of the difficulty of solving this pdf equation directly by conventional numerical methods, an approximate moment method is applied. The calculated triple velocity correlations appearing in the second-or der moments equation are calculated and compared with measured values and with those estimated by moment-closure models. The results reveal that the pdf approach gives consistency in the higher-order moments and radial budget of third moments of velocity, and that the neglect of the mean-strain production, the rapid part of the pressure correlation and the dissipation are responsible for deviations between moment-closure models and experiments. Therefore, pdf methods ap pear to be more suitable than conventional moment-closure models in terms of revealing turbulence structure.
Relation:	JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME
Appears in Collections:	[Graduate Institute of Mechanical Engineering] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	521	View/Open

社群 sharing