Document Type
Article
Publication Date
2007
Journal or Book Title
Physics of Fluids
Volume
19
First Page
055104-1
Last Page
055104-17
DOI
10.1063/1.2718580
Abstract
Experimental results for the conditional statistics, such as the velocity conditioned on a conserved scalar and the scalar conditioned on velocity, in a confined liquid-phase rectangular jet are presented and analyzed for a data set collected using simultaneous particle image velocimetry and planar laser-induced fluorescence. The joint velocity-scalar probability density function (PDF) is not joint Gaussian in this flow, as the PDF of the conserved scalar is accurately described by a beta-PDF. The conditional mean velocity is found to agree with a linear model when the scalar is close to its local mean value. A gradient PDF model is found to give poor predictions for the streamwise conditional velocity. However, the improved gradient PDF model predicts both the streamwise and transverse conditional velocities well. A linear model for the scalar fluctuation conditioned on velocity is also tested against the experimental data, showing that this model only obtains good approximations when the joint velocity-scalar PDF approaches a joint Gaussian at farther downstream locations in this flow.
Copyright Owner
American Institute of Physics
Copyright Date
2007
Language
en
File Format
application/pdf
Recommended Citation
Feng, H.; Olsen, Michael G.; Fox, Rodney O.; and Hill, James C., "Conditional statistics for passive-scalar mixing in a confined rectangular turbulent jet" (2007). Chemical and Biological Engineering Publications. 106.
https://lib.dr.iastate.edu/cbe_pubs/106
Included in
Biological Engineering Commons, Chemical Engineering Commons, Mechanical Engineering Commons
Comments
This article is from Physics of Fluids 19 (2007): 055104-1 - 055104-17, doi: 10.1063/1.2718580. Posted with permission.