Results 11 to 20 of about 107,584 (238)

Modelling of jet noise: a perspective from large-eddy simulations

Philosophical Transactions Series A, Mathematical, Physical, and Engineering Sciences, 2019
In the last decade, many research groups have reported predictions of jet noise using high-fidelity large-eddy simulations (LES) of the turbulent jet flow and these methods are beginning to be used more broadly. A brief overview of the publications since
G. Brès, S. Lele
semanticscholar   +3 more sources

Predictive large eddy simulations for urban flows: Challenges and opportunities

Building and Environment, 2018
Computational fluid dynamics predictions of urban flow are subject to several sources of uncertainty, such as the definition of the inflow boundary conditions or the turbulence model.
C. García-Sánchez, J. van Beeck, C. Gorlé   +2 more
semanticscholar   +3 more sources

A Coupled LES-Synthetic Turbulence Method for Jet Noise Prediction

Aerospace, 2022
Large-eddy simulation (LES)-based jet noise predictions do not resolve the entire broadband noise spectra, often under-predicting high frequencies that correspond to un-resolved small-scale turbulence. The coupled LES-synthetic turbulence (CLST) model is
Joshua D. Blake, Adrian Sescu, David Thompson, Yuji Hattori   +3 more
doaj   +1 more source

A Reduced Order Model based on Large Eddy Simulation of Turbulent Combustion in the Hybrid Rocket Engine [PDF]

MATEC Web of Conferences, 2019
A combined method of large eddy simulations for non-premixed combustion in a turbulent boundary layer coupled with proper orthogonal decomposition of instantaneous velocity, pressure and temperature fields is developed in order to obtain a reduced order ...
Dănăilă Sterian, Isvoranu Dragos, Levențiu Constantin, Bogoi Alina   +3 more
doaj   +1 more source

Large Eddy Simulation (LES) for IC Engine Flows [PDF]

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles, 2013
Numerical computations are carried out using an engineering-level Large Eddy Simulation (LES) model that is provided by a commercial CFD code CONVERGE. The analytical framework and experimental setup consist of a single cylinder engine with Transparent Combustion Chamber (TCC) under motored conditions.
Kuo Tang-Wei, Yang Xiaofeng, Gopalakrishnan Venkatesh, Chen Zhaohui   +3 more
openaire   +3 more sources

Cutting-Edge Turbulence Simulation Methods for Wind Energy and Aerospace Problems

Fluids, 2021
The availability of reliable and efficient turbulent flow simulation methods is highly beneficial for wind energy and aerospace developments. However, existing simulation methods suffer from significant shortcomings.
Stefan Heinz, Joachim Peinke, Bernhard Stoevesandt   +2 more
doaj   +1 more source

Near-Field Simulations of Film Cooling with a Modified DES Model

Inventions, 2020
Modeling the heat transfer characteristics of highly turbulent flow in gas turbine film cooling is important for providing better insights and engineering solutions to the film cooling problem. This study proposes a modified detached eddy simulation (DES)
Feiyan Yu, Savas Yavuzkurt
doaj   +1 more source

Leray and LANS-$\alpha$ modeling of turbulent mixing [PDF]

, 2005
Mathematical regularisation of the nonlinear terms in the Navier-Stokes equations provides a systematic approach to deriving subgrid closures for numerical simulations of turbulent flow.
Bardina J., Bernard J. Geurts, Berselli L. C., Bos F. van der, Cao C., Cheskidov A., Darryl D. Holm, Domaradzki J. A., Foias C., Frisch U., Germano M., Germano M., Germano M., Geurts B. J., Geurts B. J., Geurts B. J., Geurts B. J., Geurts B. J., Geurts B. J., Ghosal S., Holm D. D., Holm D. D., Holm D. D., Holm D. D., Horiuti K., Jameson A., Kolmogorov A. N., Kuerten J. G.M., Leray J., Lilly D. K., Meneveau C., Meneveau C., Meyers J., Meyers J., Moser R. D., Sagaut P., Smagorinsky J., Speziale C. G., Stolz S., Vreman A. W., Vreman A. W., Vreman A. W., Vreman A. W., Vreman A. W., Winckelmans G. S.   +44 more
core   +16 more sources

Wall-Modeled and Hybrid Large-Eddy Simulations of the Flow over Roughness Strips

Fluids, 2022
The flow over alternating roughness strips oriented normally to the mean stream is studied using wall-modeled large-eddy simulations (WMLES) and improved delayed detached-eddy simulations (IDDES) (a hybrid method solving the Reynolds-averaged Navier ...
Teresa Salomone, Ugo Piomelli, Giuliano De Stefano   +2 more
doaj   +1 more source

Addressing the Grid-size Sensitivity Issue in Large-eddy Simulations of Stable Boundary Layers [PDF]

, 2020
In this study, we have identified certain fundamental limitations of a mixing length parameterization used in a popular turbulent kinetic energy-based subgrid-scale model. Replacing this parameterization with a more physically realistic one significantly
Basu, Sukanta, Dai, Yi, de Roode, Stephan R, Maronga, Björn   +3 more
core   +3 more sources