Results for a turbulent system with unbounded viscosities: weak formulations, existence of solutions, boundedness, smoothness' [PDF]
, 2007 We consider a circulation system arising in turbulence modelling in fluid dynamics with unbounded eddy viscosities. Various notions of weak solutions are considered and compared. We establish existence and regularity results.
Bernardi +10 more
core +5 more sources
On Modelling Wind-Farm Wake Turbulence Autospectra and Coherence from a Database
Energies, 2018 This study addresses the feasibility of modeling wind-farm wake-turbulence autospectra and coherences from a database: flow velocity points from experimental and computational fluid dynamics (CFD) investigations. Specifically, it first applies an earlier-
Kyle A. Schau +2 more
doaj +1 more source
Simulation of hydrogen auto-ignition in a turbulent co-flow of heated air with LES and CMC approach [PDF]
, 2011 Large-Eddy Simulations (LES) with the first order Conditional Moment Closure (CMC) approach of a nitrogen-diluted hydrogen jet, igniting in a turbulent co-flowing hot air stream, are discussed. A detailed mechanism (nine species, 19 reactions) is used to
Lacor, Chris +4 more
core +1 more source
Numerical Analysis of Turbulent Combustion in a Model Swirl Gas Turbine Combustor
Journal of Combustion, 2016 Turbulent reacting flows in a generic swirl gas turbine combustor are investigated numerically. Turbulence is modelled by a URANS formulation in combination with the SST turbulence model, as the basic modelling approach.
Ali Cemal Benim +3 more
doaj +1 more source
Anisotropic Organised Eddy Simulation for the prediction of non-equilibrium turbulent flows around bodies [PDF]
, 2008 The unsteady turbulent flow around bodies at high Reynolds number is predicted by an anisotropic eddy-viscosity model in the context of the Organised Eddy Simulation (OES).
Bourguet, Rémi +3 more
core +1 more source
Prediction of flow and dispersion in cross–ventilated buildings [PDF]
E3S Web of Conferences, 2019 The present paper presents a detailed computational analysis of flow and dispersion in a generic isolated single–zone buildings. First, a grid generation strategy is discussed, that is inspired by a previous computational analysis and a grid independence
Benim Ali Cemal +2 more
doaj +1 more source
Interaction of suspended cohesive sediment and turbulence [PDF]
, 2002 This paper describes the work done in the COSINUS project, carried out within the framework of the European MAST3 research programme, on the interaction between suspended (cohesive) sediment and turbulence, with particular emphasis on its modelling ...
Bruens, A.W. +3 more
core +1 more source
Modelling supernova-driven turbulence [PDF]
Geophysical & Astrophysical Fluid Dynamics, 2019 High Mach number shocks are ubiquitous in interstellar turbulence. The Pencil Code is particularly well suited to the study of magnetohydrodynamics in weakly compressible turbulence and the numerical investigation of dynamos because of its high-order advection and time evolution algorithms.
Gent, F. A. +5 more
openaire +5 more sources
Shell Models of Superfluid Turbulence [PDF]
Journal of Physics: Conference Series, 2011 25 pages, 14 figures, to be published in ...
Wacks DH, Barenghi CF
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Renormalization of the shell model of turbulence
Physical Review E, 2023 Renormalization enables a systematic scale-by-scale analysis of multiscale systems. In this paper, we employ \textit{renormalization group} (RG) to the shell model of turbulence and show that the RG equation is satisfied by $ |u_n|^2 =K_\mathrm{Ko} ε^{2/3} k_n^{-2/3}$ and $ ν_n = ν_* \sqrt{K_\mathrm{Ko}} ε^{1/3} k_n^{-4/3}$, where $k_n, u_n $ are the ...
Mahendra K. Verma, Shadab Alam
openaire +3 more sources