Treffer: Influence of rheological parameters on polymer induced turbulent drag reduction

Title:
Influence of rheological parameters on polymer induced turbulent drag reduction
Authors:
LI, Chang-Feng, SURESHKUMAR, Radhakrishna, KHOMAMI, Bamin
Source:
The XIVth International Workshop on Numerical Methods for Non-Newtonian Flows, Santa Fe, 2005Journal of non-newtonian fluid mechanics. 140(1-3):23-40
Publisher Information:
Amsterdam: Elsevier, 2006.
Publication Year:
2006
Physical Description:
print, 34 ref
Original Material:
INIST-CNRS
Subject Terms:
Mechanics acoustics, Mécanique et acoustique, Polymers, paint and wood industries, Polymères, industries des peintures et bois, Sciences exactes et technologie, Exact sciences and technology, Physique, Physics, Domaines classiques de la physique (y compris les applications), Fundamental areas of phenomenology (including applications), Mécanique des fluides, Fluid dynamics, Méthodes de calcul en mécanique des fluides, Computational methods in fluid dynamics, Ecoulements turbulents, convection et transfert de chaleur, Turbulent flows, convection, and heat transfer, Contrôle de turbulence, Turbulence control, Ecoulements dans les tubes, les canaux et les conduites, Flows in ducts, channels, nozzles, and conduits, Ecoulement conduite, Pipe flow, Ecoulement turbulent, Turbulent flow, Fluide Oldroyd, Oldroyd fluid, Fluido Oldroyd, Modèle haltère, Dumbbell model, Modelo haltera, Modélisation, Modelling, Méthode spectrale, Spectral method, Método espectral, Propriété rhéologique, Rheological properties, Propiedad reológica, Réduction traînée, Drag reduction, Simulation numérique, Digital simulation, Solution diluée, Dilute solution, Solución diluida, Solution polymère, Polymer solutions, 4727R, Direct numerical simulation (DNS), Drag reduction: Dilute polymeric solutions, FENE-P model, Oldroyd-B model, Spectral techniques, Turbulent channel flows
Time:
4711, 4760
Document Type:
Konferenz Conference Paper
File Description:
text
Language:
English
Author Affiliations:
Department of Chemical Engineering and the Center for Materials Innovation, Washington University, St. Louis, MO 63130, United States
ISSN:
0377-0257
Access URL:
http://pascal-francis.inist.fr/vibad/index.php?action=search&terms=18430958
Rights:
Copyright 2007 INIST-CNRS
CC BY 4.0
Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS
Notes:
Physics: fluid mechanics
Accession Number:
edscal.18430958
Database:
PASCAL Archive

Weitere Informationen

Direct numerical simulations (DNS) of polymer induced drag reduction in turbulent channel flows up to the maximum drag reduction (MDR) limit have been performed using a fully spectral method in conjunction with kinetic theory based elastic dumbbell models for the description of polymer chain dynamics. It is shown that to obtain significant levels of drag reduction large polymer chain extensibility and high Weissenberg numbers are required. In addition, it is demonstrated that to capture flow dynamics in the high drag reduction (HDR) and MDR regimes, very long computational domain lengths of the order of 104 wall units are required. The simulation results in turn have been used to develop a scaling that describes the interplay between rheological parameters (i.e., maximum chain extension and relaxation time) and the extent of drag reduction as a function of Reynolds number. In addition, turbulence statistics are analyzed and correlations between the polymer body force and velocity fluctuations have been developed with particular emphasis on the HDR and MDR regimes. These observations have been used to decipher the effect of polymer additives on the dynamics of the flow and drag reduction.