Results 1 to 10 of about 1,075,600 (388)
Analysis of a turbulence model related to that of k-epsilon for stationary and compressible flows [PDF]
arXiv, 2010 We shall study a turbulence model arising in compressible fluid mechanics. The model called $\theta - \phi$ we study is closely related to the k-epsilon model.
Dreyfuss, Pierre
core +7 more sources
A generalized k-epsilon model for turbulence modulation in fluid-particle flows [PDF]
arXiv, 2022 A large amount of published data show that particles with diameter above 10\% of the turbulence integral length scale ($D/l >0.1$) tend to increase the turbulent kinetic energy of the carrier fluid above the single-phase value, and smaller particles tend to suppress it.
Skartlien, Roar +2 more
arxiv +5 more sources
Near-wall k-epsilon turbulence modeling [PDF]
AIAA Journal, 1989 The flow fields from a turbulent channel simulation are used to compute the budgets for the turbulent kinetic energy (k) and its dissipation rate (epsilon). Data from boundary layer simulations are used to analyze the dependence of the eddy-viscosity damping-function on the Reynolds number and the distance from the wall.
John Kim, Nagi N. Mansour, Parviz Moin
openaire +3 more sources
Modeling of k-.EPSILON. Turbulence Model by Statistical Turbulence Theory and its Applications.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 1991 A new near wall k-e model has been proposed, which includes the Prandtl number effect. Modeling was made from the statistical theory developed by A. Yoshizawa. The model was compatible with near wall limiting behavior for turbulent energy and Reynolds stress.
Masanori Yamakawa, Shinichi Inage
openaire +4 more sources
EVALUATION OF K-EPSILON MODEL FOR TURBULENT BUOYANT JET
Platform : A Journal of Engineering, 2019 The modelling of a turbulent buoyant jet is challenging due to the complex nature of such flow, which consists of two fluids with different densities, as well as the multi-scale flow phenomena associated in both space and time. In this paper, the k-epsilon turbulence model is applied to model a turbulent buoyant jet at different flow regimes including ...
Osman Abu Bakr Mohmmed Ahmed +1 more
openaire +3 more sources
New time scale based k-epsilon model for near-wall turbulence [PDF]
AIAA Journal, 1993 A k-epsilon model is proposed for wall bonded turbulent flows. In this model, the eddy viscosity is characterized by a turbulent velocity scale and a turbulent time scale. The time scale is bounded from below by the Kolmogorov time scale. The dissipation equation is reformulated using this time scale and no singularity exists at the wall.
Tsan-Hsing Shih, Z. Yang
openaire +3 more sources
TURBULENT COMPRESSIBLE AXISYMMETRIC FLOWS COMPUTATION WITH THE K-EPSILON MODEL [PDF]
International Journal of Computational Fluid Dynamics, 1993 A new technique is proposed to compute axisymmetric flows using existing 2D Navier-Stokes conservative solvers. Turbulence modelling is done with a k - ∊ model for high Reynolds number regions and a k - e one-equation model for near-wall regions. Moreover, a new robust algorithm for the turbulent equations is presented. A hypersonic boundary layer on a
Bijan Mohammad, Jacques Hervé Saiac
openaire +2 more sources
Computational Fluid Dynamics (CFD) Mesh Independency Study of A Straight Blade Horizontal Axis Tidal Turbine [PDF]
, 2016 This paper numerically investigates a 3D mesh independency study of a straight blade horizontal axis tidal turbine modelled using Computational Fluid Dynamics (CFD).
Chapman, Craig +2 more
core +1 more source
Modelling the dynamics of turbulent floods [PDF]
, 2002 Consider the dynamics of turbulent flow in rivers, estuaries and floods. Based on the widely used k-epsilon model for turbulence, we use the techniques of centre manifold theory to derive dynamical models for the evolution of the water depth and of ...
Birkhoff Garrett +5 more
core +2 more sources
Calculations of Turbulent Flows with Pressure Gradients using a k-.EPSILON. Model.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 1993 A k-e turbulence model is developed to calculate wall turbulent shear flows under various pressure gradient conditions. In the present model, we set the dissipation rate of turbulent energy at a wall equal to zero, though the wall limiting behavior of velocity fluctuations is reproduced exactly.
Hirofumi Hattori, Yasutaka Nagano
openaire +5 more sources