Results 291 to 300 of about 14,104 (341)

Turbulent channel and Couette flows using an anisotropic k-epsilon model

AIAA Journal, 1987
Turbulent channel and Couette flows are studied numerically by using an anisotropic k-epsilon model. A feature of this model lies in an anisotropic expression for the Reynolds stress and the deviation of the Reynolds stress from an isotropic eddy-viscosity representation is incorporated.
Nisizima, Shoiti, Yoshizawa, Akira
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Adaptive Remeshing for the k-Epsilon Model of Turbulence

AIAA Journal, 1994
Summary: An adaptive finite element method for solving incompressible turbulent flows using the \(k\)-\(\varepsilon\) model of turbulence is presented. Solutions are obtained in primitive variables using a highly accurate quadratic finite element on unstructured grids.
Pelletier, D., Ilinca, F.
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Asymptotic behavior of solutions of the renormalization group k-epsilon turbulence model

AIAA Journal, 1994
The authors' point of view is that the only efficient way to elaborate practical engineering problems of complex geometries and physical complexity in turbulent flows is to employ Reynolds-averaged Navier- Stokes equations. For this purpose, a renormalization group (RNG) \(K - \varepsilon\) turbulence model derived from incompressible Navier-Stokes ...
Yakhot, A., Staroselsky, I., Orszag, S. A.   +2 more
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Limitations of the near-wall k-epsilon turbulence model

AIAA Journal, 1986
Comparisons are given at two different Reynolds numbers between the measured turbulent kinetic energy in channel flow and the predictions of several near-wall variants of the k-e closure. Included among these are new calculations based on a form of the e equation that is consistent with the physically correct boundary condition. It is observed that all
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Study of non-linear k-epsilon model for turbulent swirling flows

34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 1998
Computations on the axisymmetric turbulent flows were conducted to investigate the applicability of the non-linear models. Three kinds of the turbulence models of the standard k-s model, quadratic Reyno Ids stress-strain model, and cubic Reynolds stress-strain model were applied and computations were compared with data. The effects of inlet dissipation
Mohammad Nikjoo, Hukam Mongia
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Explicit Navier-Stokes computation of cascade flows using the k-epsilon turbulence model

AIAA Journal, 1992
A fully explicit two-dimensional flow solver, based on a four-stage Runge-Kutta scheme, has been developed and used to predict two-dimensional viscous flow through turbomachinery cascades for which experimental data are available. The formulation is applied to the density-weighted time-averaged Navier-Stokes equations. Several features of the technique
Kunz, Robert F., Lakshminarayana, Budugur   +1 more
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Study of turbulent compressible mixing layers using two-equation turbulence models including an RNG k-epsilon model

36th AIAA Aerospace Sciences Meeting and Exhibit, 1998
For compressible mixing layers, the most widely used turbulence models, without further modification, cannot predict key compressibility effects. The present study examines both the capability of compressibility correction methods implemented in two-equation models and the improvements proposed by RNG methods.
John Papp, K. Ghia
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Comparative study of turbulence models in predicting turbulent pipe flow. I - Algebraic stress and k-epsilon models

AIAA Journal, 1989
Developing turbulent pipe flow in a smooth circular pipe with a length of about 80 diameters is simulated at Reynolds numbers of 10,000, 38,000, 90,000 and 380,000, using seven different turbulence models. The governing equations are solved in their fully elliptic forms.
R. Martinuzzi, A. Pollard
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A Note on the Numerical Treatment of the k-epsilon Turbulence Model*

International Journal of Computational Fluid Dynamics, 2001
Numerical solution of the equations arising from the κ mdash; e turbulence model has difficulties inherent to nonlinear convection-reaction-diffusion equations with strong reaction terms, resulting in that numerical schemes easily become unstable. We present a formulation that stresses on the robustness of the solution method, tackling common problems ...
ADRIAN J. LEW†, GUSTAVO C. BUSCAGLIA, PABLO M. CARRICA   +2 more
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Numerical simulation of aerosound from an airfoil using k-epsilon turbulence model

34th Aerospace Sciences Meeting and Exhibit, 1996
Numerical simulation of aerosound from low-speed turbulent flow over a NACA 0012 airfoil by using the k-epsilon turbulence model has been performed. Various attack angles and various freestream velocities are tested. The aerodynamics and fluid dynamics from numerical results were compared with experimental data.
William Meecham, Wei-Jen Huang
openaire   +1 more source