eddy viscosity model

eddy viscosity model

[′ed·ē vi′skäs·əd·ē ‚mäd·əl]
(fluid mechanics)
A model of the Reynolds stresses in turbulent flow which is based on the idea that turbulent mixing, analogous to molecular mixing, is governed by an effective viscosity (the eddy viscosity) which is not a property of the fluid but a consequence of the local state of turbulence.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Taking consideration of local eddy-viscosity and near wall behaviours, the wall-adapting local eddy viscosity model is used.
Transient Simulation Research on Automobile Aerodynamic Lift Based on LBM Method
[13.] Shih, T.-H., "Anew k - [member of] eddy viscosity model for high reynolds number turbulent flows," Computers & Fluids 24(3):227-238, 1995, doi:http://dx.doi.org/10.1016/0045-7930(94)0032-T.
Turbulence Models and Model Closure Coefficients Sensitivity of NASCAR Racecar RANS CFD Aerodynamic Predictions
Classical turbulence models based on the Reynolds decomposition (RANS) with an eddy viscosity model lead to a calculated turbulent viscosity up to a hundred times higher than that suitable for resolving turbulent structures important for detailed in-cylinder flow analyses [6].
Analysis of cycle-to-cycle variations of the mixing process in a direct injection spark ignition engine using scale-resolving simulations
[19.] Germano, M., Piomelli, U., Moin, P., and Cabot, W.H., "A dynamic subgrid-scale eddy viscosity model," Physics of Fluids A3, 1760 (1991), doi:10.1063/l.857955.
Aerodynamics of an unloaded timber truck - A CFD investigation
The most simple and basic model in Reynolds stress modeling -<[u'.sub.i][u'.sub.j]> is the eddy viscosity model. In analogy with the interaction formula for the shearing stress and velocity gradient generated by a coefficient of kinematic viscosity v, eddy viscosity coefficient [v.sub.t], and the Reynolds stress -<[u'.sub.i][u'.sub.j]> in relation to an average velocity gradient and [v.sub.t],
Analysis of change in the wind speed ratio according to apartment layout and solutions
The eddy viscosity [v.sub.t] is computed using simple mixing-length eddy viscosity model with near-wall damping in Wang and Moin [30] as follows:
Large Eddy simulation of unstably stratified turbulent flow over urban-like building arrays
A dynamic subgrid-scale eddy viscosity model. Proceedings of the 1990 Summer Program, Standford University, Stanford, CA, pp.
Assessment of various turbulence models for transitional flows in an enclosed environment (RP-1271)
(4) eddy viscosity model: [[tau].sub.ij] - 1/3 [[delta].sub.ij][[tau].sub.kk] = -2C[[DELTA].sup.2]|[bar.S]|[[bar.S].sub.ij]
Large-Eddy simulation and multigrid methods
New turbulence models are added in this upgraded version, including a large eddy simulation and a nonlinear eddy viscosity model. The postprocessing procedure has been enhanced, according to the developer, to provide a reduction in numerical processing times.
Multidimensional fludi flow analysis. (Software exchange)
A dynamic subgrid scale eddy viscosity model. Physics of Fluids A: Fluid Dynamics (1989-1993), 3(7):1760-1765, 1991.
Assessment of Advanced SGS Models for LES Analysis of ICE Wall-Bounded Flows - Part I: Basic Test Case
Development and application of a cubic eddy viscosity model of turbulence, Int.
Numerical investigation of the heat transfer in an annulus cylindrical space/Silumos perdavimo ziediniame cilindre skaitine analize
A dynamic subgrid-scale eddy viscosity model. Physics of Fluids 3: 1760-1765.
Large eddy simulation of airflows in a full scale room at different ventilation rates
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