An Algebraic Non-Equilibrium Turbulence Model of the High Reynolds Number Transition Region

An Algebraic Non-Equilibrium Turbulence Model of the High Reynolds Number Transition Region

We present a mixing length-based algebraic turbulence model calibrated to pipe flow; the main purpose of the model is to capture the increasing turbulence production-to-dissipation ratio observed in connection with the high Reynolds number transition region. The model includes the mixing length desc...

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Bibliographic Details
Published in:Water (Basel) Vol. 15; no. 18; p. 3234
Main Author: Basse, Nils T.
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-09-2023
Subjects:
Algebra
algebraic turbulence model
Boundary conditions
Equilibrium
Fluid dynamics
Friction
high Reynolds number transition region
Kinematics
mixing length
non-equilibrium flow
Reynolds number
Simulation methods
Turbulence
Turbulence models
Velocity
Viscosity
United Kingdom
Germany
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Summary:We present a mixing length-based algebraic turbulence model calibrated to pipe flow; the main purpose of the model is to capture the increasing turbulence production-to-dissipation ratio observed in connection with the high Reynolds number transition region. The model includes the mixing length description by Gersten and Herwig, which takes the observed variation of the von Kármán number with Reynolds number into account. Pipe wall roughness effects are included in the model. Results are presented for area-averaged (integral) quantities, which can be used both as a self-contained model and as initial inlet boundary conditions for computational fluid dynamics simulations.
ISSN:2073-4441
2073-4441
DOI:10.3390/w15183234