Modeling and application of a stochastic drag for fibers in turbulent flows

Considering the dynamics of long slender elastic fibers in turbulent flows, there exists a stochastic aerodynamic force concept for a general drag model based on a k– ϵ turbulence description in literature. In this paper we generalize the concept and formulate an air drag model that is universally v...

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Bibliographic Details
Published in:International journal of multiphase flow 2011-03, Vol.37 (2), p.136-148
Main Authors: Marheineke, Nicole, Wegener, Raimund
Format: Article
Language:English
Subjects:
Aerodynamic drag
Aerodynamics
Computational fluid dynamics
Data interpolation
Dimensional analysis
Drag
Exact sciences and technology
Fibers
Fiber–fluid interactions
Fluid dynamics
Fluid flow
Fundamental areas of phenomenology (including applications)
Long slender fibers
Mathematical models
Multiphase and particle-laden flows
Nonhomogeneous flows
Numerical simulations
Physics
Stochastic partial differential algebraic equation
Turbulence
Turbulence modeling
Turbulence simulation and modeling
Turbulent flow
Turbulent flows, convection, and heat transfer
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Summary:Considering the dynamics of long slender elastic fibers in turbulent flows, there exists a stochastic aerodynamic force concept for a general drag model based on a k– ϵ turbulence description in literature. In this paper we generalize the concept and formulate an air drag model that is universally valid for all Reynolds number regimes and incident flow directions. The associated turbulent force overcomes the hitherto existing limitations and allows the simulation of all kind of fibers (flexible, stiff, light, heavy) immersed in turbulent flows. Moreover, the comparison of the numerical results with PIV-measurements shows very convincing agreements in the industrial application of technical textile manufacturing.
ISSN:0301-9322
1879-3533
DOI:10.1016/j.ijmultiphaseflow.2010.10.001