Scalar flux measurements in turbulent pipe flow employing combined particle image velocimetry and planar laser induced fluorescence

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Publication Type thesis
School or College College of Engineering
Department Mechanical Engineering
Author Oldroyd, Holly Jayne
Title Scalar flux measurements in turbulent pipe flow employing combined particle image velocimetry and planar laser induced fluorescence
Date 2010-08
Description Turbulent mixing, the dominant mixing mechanism in turbulent pipe flow, is important for understanding contaminant dispersion in pipe ow applications. The scalar fluxes, or the covariance velocity and concentration, are important quantities in understanding the underlying turbulent mixing mechanisms because they are present in the turbulent scalar transport equation. However, the scalar flux terms give rise to a closure problem, and cannot be directly prescribed by the governing equation. Currently, limited information exists regarding the scalar fluxes. In order to contribute to the body of knowledge concerning turbulent mixing in pipe flow, scalar flux measurements were made for a centerline injection of a passive scalar. PIV and PLIF were employed to measure the velocity and concentration fields for Re = 12; 700 at x=D ? 6:5. The results of mean velocity and concentration fields compared reasonably well with theory and previously published results. Subsequently, scalar flux profi les were extracted from the planar measurements.
Type Text
Publisher University of Utah
Subject PIV PLIF; Scalar flux measurements; Scalar transport; Turbulent mixing; Turbulent pipe flow
Subject LCSH Eddy flux;Pipe -- Fluid dynamics; Turbulence
Dissertation Institution University of Utah
Dissertation Name MS
Language eng
Rights Management ©Holly Jane Oldroyd.
Format Medium application/pdf
Format Extent 6,783,810 bytes
Source Original in Marriott Library Special Collections, TJ7.5 2010 .O43
ARK ark:/87278/s65m6m91
Setname ir_etd
Date Created 2012-04-23
Date Modified 2017-12-06
ID 193050
Reference URL https://collections.lib.utah.edu/ark:/87278/s65m6m91