Reynolds-number dependence of the longitudinal dispersion in turbulent pipe flow.

Hawkins, Christopher; Angheluta, Luiza; Krotkiewski, Marcin; Jamtveit, Bjørn

Hawkins, Christopher; Angheluta, Luiza; Krotkiewski, Marcin; Jamtveit, Bjørn.

Afiliación

Hawkins C; Physics of Geological Processes, Department of Physics, University of Oslo, P.O. 1048 Blindern, 0316 Oslo, Norway.
Angheluta L; Physics of Geological Processes, Department of Physics, University of Oslo, P.O. 1048 Blindern, 0316 Oslo, Norway.
Krotkiewski M; Physics of Geological Processes, Department of Geoscience, University of Oslo, P.O. 1048 Blindern, 0316 Oslo, Norway.
Jamtveit B; Physics of Geological Processes, Department of Geoscience, University of Oslo, P.O. 1048 Blindern, 0316 Oslo, Norway.

Phys Rev E ; 93: 043119, 2016 04.

Article en En | MEDLINE | ID: mdl-27176402

RESUMEN

In Taylor's theory, the longitudinal dispersion in turbulent pipe flows approaches, on long time scales, a diffusive behavior with a constant diffusivity K_{L}, which depends empirically on the Reynolds number Re. We show that the dependence on Re can be determined from the turbulent energy spectrum. By using the intimate connection between the friction factor and the longitudinal dispersion in wall-bounded turbulence, we predict different asymptotic scaling laws of K_{L}(Re) depending on the different turbulent cascades in two-dimensional turbulence. We also explore numerically the K_{L}(Re) dependence in turbulent channel flows with smooth and rough walls using a lattice Boltzmann method.

Texto completo

Añadir a Mi BVS

Imprimir

XML

PubMed Links

Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies / Risk_factors_studies Idioma: En Revista: Phys Rev E Año: 2016 Tipo del documento: Article País de afiliación: Noruega Pais de publicación: Estados Unidos

Texto completo

Añadir a Mi BVS

Imprimir

XML

PubMed Links

Buscar en Google