Mixing mechanisms in turbulent pipe flow

Journal Article · Sat Mar 01 00:00:00 EST 1997 · Physics of Fluids (1994)

DOI:https://doi.org/10.1063/1.869211· OSTI ID:450304

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

---

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)

An experimental investigation of passive scalar mixing in turbulent pipe flow is carried out using a new non-intrusive scalar initialization technique. The measurements support a recently predicted similarity scaling of concentration spectra in flows that are unbounded in one direction. Reflecting this scaling, the scalar variance exhibits a power-law rather than exponential decay, indicating that the traditional plug-flow reactor picture of turbulent pipe-flow mixing omits key physical mechanisms.{copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 450304
• Journal Information: Physics of Fluids (1994), Vol. 9, Issue 3; Other Information: PBD: Mar 1997
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
22 NUCLEAR REACTOR TECHNOLOGY
TURBULENT FLOW
MIXING
REACTOR COOLING SYSTEMS
TURBULENCE
SCALAR FIELDS
SCALING
SPECTRA
FLUCTUATIONS
PIPES