Results 41 to 50 of about 21,860,116 (312)
A LES-Langevin model for turbulence [PDF]
The European Physical Journal B - Condensed Matter and Complex Systems, 2005 We propose a new model of turbulence for use in large-eddy simulations (LES). The turbulent force, represented here by the turbulent Lamb vector, is divided in two contributions. The contribution including only subfilter fields is deterministically modeled through a classical eddy-viscosity.
Laval, Jean-Philippe +1 more
openaire +4 more sources
Comprehensive CFD Aerodynamic Simulation of a Sport Motorcycle
Energies, 2022 Nowadays, aerodynamics is a key focal point in the vehicle design process. Beyond its direct impact on the performance of a vehicle, it also has significant effects on economics and safety. In the last decade numerical methods, mainly Computational Fluid
Krzysztof Wiński, Adam Piechna
doaj +1 more source
A stability condition for turbulence model: From EMMS model to EMMS-based turbulence model [PDF]
, 2013 The closure problem of turbulence is still a challenging issue in turbulence modeling. In this work, a stability condition is used to close turbulence. Specifically, we regard single-phase flow as a mixture of turbulent and non-turbulent fluids, separating the structure of turbulence. Subsequently, according to the picture of the turbulent eddy cascade,
arxiv +1 more source
Helicity advection in turbulent models [PDF]
Le Journal de Physique IV, 1998 6 pages, 2 figures, contribution to the proceedings of the conference: Disorder and Chaos, in honour of Giovanni Paladin, September 22-24, 1997 ...
L Biferale, D Pierotti, F Toschi
openaire +5 more sources
On the Relative Effect of Underwater Optical Turbulence in Different Channel Conditions
IEEE AccessThis paper presents a simulation framework for modelling optical underwater turbulence in conjunction with absorption and scattering. Using this technique, the channel is evaluated in two ways: the turbulent statistics in different channel conditions ...
Callum T. Geldard +2 more
doaj +1 more source
Comparison of Different Turbulence Models in Open Channels with Smooth-Rough Bedforms [PDF]
Mehran University Research Journal of Engineering and Technology, 2013 The turbulence models play an important role in all types of computational fluid dynamics based numerical modelling. There is no universal turbulence model which can be applied in all the scenarios.
Usman Ghani, Shahid Ali, Sabahat Arif
doaj
Numerical Studies of Quantum Turbulence [PDF]
J. Low. Temp. Phys. 188, 119 (2017), 2017 We review numerical studies of quantum turbulence. Quantum turbulence is currently one of the most important problems in low temperature physics and is actively studied for superfluid helium and atomic Bose--Einstein condensates. A key aspect of quantum turbulence is the dynamics of condensates and quantized vortices. The dynamics of quantized vortices
arxiv +1 more source
A Machine Learning Approach to Improve Turbulence Modelling from DNS Data Using Neural Networks
International Journal of Turbomachinery, Propulsion and Power, 2021 In this paper, we investigate the feasibility of using DNS data and machine learning algorithms to assist RANS turbulence model development. High-fidelity DNS data are generated with the incompressible Navier–Stokes solver implemented in the spectral/hp ...
Yuri Frey Marioni +5 more
doaj +1 more source
Multiscale Turbulence Models Based on Convected Fluid Microstructure
, 2012 The Euler-Poincar\'e approach to complex fluids is used to derive multiscale equations for computationally modelling Euler flows as a basis for modelling turbulence.
Holm, Darryl D., Tronci, Cesare
core +1 more source
Large-scale magnetic flux concentrations from turbulent stresses [PDF]
, 2009 In this study we provide the first numerical demonstration of the effects of turbulence on the mean Lorentz force and the resulting formation of large-scale magnetic structures.
Brandenburg +44 more
core +3 more sources