Long-tailed probability distributions in turbulent-pipe-flow mixing

Journal Article · Fri Aug 01 00:00:00 EDT 1997 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

DOI:https://doi.org/10.1103/PhysRevE.56.1753· OSTI ID:528023

Guilkey, J E ^[1]; Kerstein, A R ^[2]; McMurtry, P A; Klewicki, J C ^[1]

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1. Department of Mechanical Engineering, University of Utah, Salt Lake City, Utah 84112 (United States)
2. Combustion Research Facility, Sandia National Laboratories, Livermore, California 94551-0969 (United States)

Exponential-tailed scalar probability density functions (PDF{close_quote}s) are obtained by high-pass filtering scalar concentration time series measured in turbulent pipe flow. This behavior reflects the scale separation of scalar and velocity fluctuations that develops in this flow, such that the low-wave-number scalar fluctuations act as an imposed scalar gradient stirred by finer-scale wall-generated shear. This observation broadens the class of flows in which long-tailed scalar PDF{close_quote}s are anticipated to occur. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 528023
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 56, Issue 2; Other Information: PBD: Aug 1997
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
TURBULENT FLOW
PROBABILITY
TURBULENCE
PIPES
MIXING
DENSITY
DISTRIBUTION
SCALARS
FLUCTUATIONS
TIME-SERIES ANALYSIS