Taking consideration of local eddy-viscosity and near wall behaviours, the wall-adapting local
eddy viscosity model is used.
[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.
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].
[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.
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],
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:
A dynamic subgrid-scale
eddy viscosity model. Proceedings of the 1990 Summer Program, Standford University, Stanford, CA, pp.
(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]
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.
A dynamic subgrid scale
eddy viscosity model. Physics of Fluids A: Fluid Dynamics (1989-1993), 3(7):1760-1765, 1991.
Development and application of a cubic
eddy viscosity model of turbulence, Int.
A dynamic subgrid-scale
eddy viscosity model. Physics of Fluids 3: 1760-1765.
