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 ?
is introduced in a Large-Eddy Simulation with a pure eddy viscosity model.
But still the evolution of the mixed and eddy viscosity model is very similar.
2006) simulated ventilation in tunnels and galleries with the constant turbulent eddy viscosity model, the k-[epsilon] model, and the S-A model.
A new eddy viscosity model for high Reynolds number turbulent flows.
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.
Although not shown here, most of the eddy viscosity models underpredicted the air velocity, especially at position 5.
Different type of eddy viscosity models have been developed in [8] assuming a three-layer eddy viscosity distribution.
In addition, FLUENT makes available a large suite of turbulence models ranging from one-equation eddy viscosity models through full second-moment closures.