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.
References in periodicals archive ?
Taking consideration of local eddy-viscosity and near wall behaviours, the wall-adapting local eddy viscosity model is used.
Anew k - [member of] eddy viscosity model for high reynolds number turbulent flows," Computers & Fluids 24(3):227-238, 1995, doi:http://dx.
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].
A dynamic subgrid-scale eddy viscosity model," Physics of Fluids A3, 1760 (1991), doi:10.
Cabot, "A dynamic subgrid-scale eddy viscosity model," Physics of Fluids A, vol.
is introduced in a Large-Eddy Simulation with a pure eddy viscosity model.
New turbulence models are added in this upgraded version, including a large eddy simulation and a nonlinear eddy viscosity model.
2006) simulated ventilation in tunnels and galleries with the constant turbulent eddy viscosity model, the k-[epsilon] model, and the S-A model.
The turbulence modeling community has responded by developing model equations of ever increasing complexity, ranging from the nonlinear eddy viscosity models where the Reynolds stress is nonlinearly related to the mean rate of strain, to the full Reynolds-stress transport models where each component of the Reynolds stress is governed by its own transport equation (able to resolve secondary flows).
Thus, it was not very surprising to see the good performance of these eddy viscosity models.