Results 71 to 80 of about 377,594 (201)

Assessment of Effect of Flux Scheme and Turbulence Model on Blade-to-blade Calculations [PDF]

Journal of Applied Fluid Mechanics
Today, due to advances in computing power, Reynolds Averaged Navier-Stokes (RANS) solvers are widely preferred for quasi-three-dimensional (Q3D) blade-to-blade analysis.
M. Bilgiç, Ö. U. Baran, M. H. Aksel
doaj   +1 more source

A Low-Reynolds-Number k-.EPSILON. Model Reflecting Characteristics of a Reynolds Stress Model.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 1995
A new type of k-e model which incorporates some essential characteristics of a Reynolds stress model is proposed. The present model is a nonlinear k-e model taking into account the low-Reynolds-number effects near the wall and applicable to complex flows with separation and reattachment.
Ken-ichi Abe, Tsuguo Kondoh, Yasutaka Nagano   +2 more
openaire   +2 more sources

Large-Eddy vs. Reynolds-Averaged Navier–Stokes Simulations of Flow and Heat Transfer in a U-Duct with Unsteady Flow Separation

Energies
Large-eddy simulation (LES) and Reynolds-Averaged Navier–Stokes (RANS) equations were used to study incompressible flow and heat transfer in a U-duct with a high-aspect-ratio trapezoidal cross section.
Kenny S. Hu, Tom I-P. Shih
doaj   +1 more source

Improvement of the second- and third-moment modeling of turbulence: A study of Reynolds-stress closure model [PDF]

Four parts of the Reynolds-stress closure modeling are reported: (1) improvement of the k and epsilon equaitons; (2) development of the third-moment transport equation; (3) formulation of the diffusion coefficient of the momentum equation by using the ...
Amano, R. S., Goel, P.
core   +1 more source

Third-moment closure of turbulence for predictions of separating and reattaching shear flows: A study of Reynolds-stress closure model [PDF]

A numerical study of computations in backward-facing steps with flow separation and reattachment, using the Reynolds stress closure is presented. The highlight of this study is the improvement of the Reynold-stress model (RSM) by modifying the diffusive ...
Amano, R. S., Goel, P.
core   +1 more source

Accuracy Analysis of the Turbulence Models K–Ω GEKO and RSM Stress-BSL Using the Example of a 2D Hill Flow Problem

Journal of Mechanical Engineering
This paper presents a numerical simulation of a two-dimensional turbulent flow around a hill (2D Hill Flow) corresponding to the ERCOFTAC Case 018 reference case. Two turbulence models were used to calculate the turbulent flow: a modified two-parameter k-
Murodil Madaliev, Aybek Arifjanov, Lukmon Samiev, Zokhidjon Abdulkhaev   +3 more
doaj   +1 more source

Computation of turbulent near wake for asymmetric airfoils [PDF]

A numerical procedure for studying the turbulent near wake of two dimensional airfoil sections is presented. The Reynolds Navier-Stokes equations were written for flow about bodies of arbitrary geometry and solved on an arbitrary nonuniform curvilinear ...
Deiwert, G. S.
core   +1 more source

Development and validation of a CFD model prediction of temperature separation in swirling fluid flows

Авіаційно-космічна техніка та технологія
In this study, a numerical model was developed for performing 3D computational fluid dynamics (CFD) simulations of the total temperature separation phenomenon in rotating flows, and the accuracy of this model was validated.
Artem Karpenko, Yuriy Torba
doaj   +1 more source

Numerical analysis of friction factor for a fully developed turbulent flow using k–ε turbulence model with enhanced wall treatment

Beni-Suef University Journal of Basic and Applied Sciences, 2014
The aim of this study is to formulate a computational fluid dynamics (CFD) model that can illustrate the fully turbulent flow in a pipe at higher Reynolds number.
Muhammad Ahsan
doaj   +1 more source

Calculation of turbulence-driven secondary motion in ducts with arbitrary cross section [PDF]

Calculation methods for turbulent duct flows are generalized for ducts with arbitrary cross-sections. The irregular physical geometry is transformed into a regular one in computational space, and the flow equations are solved with a finite-volume ...
Demuren, A. O.
core   +1 more source