Results 131 to 140 of about 11,201 (183)
Some of the next articles are maybe not open access.
Reynolds Stress Closure in Hybrid RANS-LES Methods
2015The feasibility of using the elliptic blending Reynolds stress model (EB-RSM) in hybrid RANS-LES methods is investigated in this paper. The advantage of the EB-RSM is that it does not use any geometrical wall distance or wall normal vector information which makes it well suited for application in flows with complex wall geometries.
Michael Stoellinger +2 more
openaire +1 more source
Numerical Study of an Iced Airfoil Using Window-Embedded RANS/LES Hybrid Method
9th AIAA Atmospheric and Space Environments Conference, 2017Unsteady and massive flow separation around a GLC-305 airfoil with a 22.5 min leadingedge horn ice accretion is numerically investigated using Delayed Detached-Eddy Simulation (DDES) based on shear layer stress transport model (SST). To resolve abundant turbulent structures, a low dissipation scheme called SLAU/MDCD is applied.
Xiao, Maochao +2 more
openaire +1 more source
ATAAC – An EU-Project Dedicated to Hybrid RANS/LES Methods
2012This paper presents the European collaborative project “Advanced Turbulence simulation for Aerodynamic Application Challenges”, i.e. its background, objectives, approach and status. As an example of the outcome of this project, results obtained by some partners for one of the test cases employed are compared and discussed highlighting the status of ...
Schwamborn, Dieter, Strelets, Mikhail
openaire +2 more sources
Comparison of Hybrid RANS-LES Methods for Massively Separated Flows
2012The numerical analysis of massively separated flow around a circular cylinder at a high Reynolds number is presented in this paper. The simulations are carried out using the hybrid RANS-LES simulations, namely detached-eddy simulation (DES) and its modified version, delayed detached-eddy simulation (DDES).
Naveed Durrani, Ning Qin
openaire +1 more source
Numerical simulations of a pebble bed configuration using hybrid (RANS–LES) methods
Nuclear Engineering and Design, 2013Abstract A High Temperature Reactor (HTR) is envisaged to be one of the reactor designs to play a role in nuclear power generation including process heat applications. The HTR design concept exhibits excellent safety features due to the low power density and the large amount of graphite present in the core which gives a large thermal inertia in the ...
A. Shams +3 more
openaire +1 more source
Hybrid RANS-LES Methods Applied to Acoustic Problems
2015In this paper, two acoustic problems of importance to the engineering community are solved using hybrid RANS-LES methods. More specifically, results from the problems of supersonic flow over a surface mounted protuberance and that of a supersonic jet impingement on a flat plat are presented.
openaire +1 more source
Numerical Investigation of a Laboratory Combustor Applying Hybrid RANS-LES Methods
2008In this paper the three-dimensional non-reacting turbulent flow field of a swirl-stabilized gas turbine model combustor is analysed with compressible CFD. For the flow analysis URANS and Hybrid RANS/LES (DES, SAS) turbulence models were applied. The governing equations and the numerical method are described.
Widenhorn, Axel +3 more
openaire +2 more sources
Interface methods for grey-area mitigation in turbulence-resolving hybrid RANS-LES
International Journal of Heat and Fluid Flow, 2018© 2018 A grey area mitigation method is proposed for hybrid RANS-LES modeling. The proposed methodology is evaluated using a hybrid RANS-LES method based on a Low-Reynolds-Number k−ω model applied to channel flow, boundary layer flow and a spatially developing mixing layer flow. Emphasis is put on the use of commutation terms at the RANS-LES interfaces
S. Arvidson, L. Davidson, S.-H. Peng
openaire +1 more source
Hybrid RANS-LES simulations with the discontinuous Galerkin method
2020In recent years, a growing interest has been shown for hybrid RANS-LES approaches and their application to high-fidelity simulations of massively separated flows. Such modelling approach is intended as a way to go beyond the known limitations of the RANS in simulating massively separated flows and the computational cost of LES, which is nowadays still ...
Bassi F. +4 more
openaire +2 more sources
Investigation of Practical Flow Control Methodologies with RANS/LES Hybrid Methods
2010Passive flow control methods, such as vortex generators (VG) on supercritical wing and before a cavity, spoiler in a large expanded diffuser, boat-tailed or multi-step afterbodies are numerically investigated with RANS or RANS/LES hybrid methods. The basic turbulence models are two-equation k-( models, such as shear stress transport (SST) and with ...
S. Fu +3 more
openaire +1 more source