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Keywords: LES
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Proceedings Papers

Proc. ASME. FEDSM2021, Volume 1: Aerospace Engineering Division Joint Track; Computational Fluid Dynamics, V001T02A051, August 10–12, 2021
Paper No: FEDSM2021-65798
... for atmospheric turbulence using U Characteristic length scale Large-Eddy Simulations (LES) and analyze characteristic structures arising from these. These could include contours of L velocity magnitude, as well as of levels of a passive scalar introduced into the simulated flows. We will then identify features 1...
Proceedings Papers

Proc. ASME. FEDSM2021, Volume 1: Aerospace Engineering Division Joint Track; Computational Fluid Dynamics, V001T02A035, August 10–12, 2021
Paper No: FEDSM2021-65812
... the velocity to the vertical distance (velocity profile). We will perform a regression analysis to fit data from Large-Eddy Simulations (LES) and apply Fourier transformation from a time domain to a frequency domain. The objective is to use Fourier transform analysis to determine eddy size distribution...
Proceedings Papers

Proc. ASME. FEDSM2021, Volume 3: Fluid Mechanics; Micro and Nano Fluid Dynamics; Multiphase Flow, V003T05A027, August 10–12, 2021
Paper No: FEDSM2021-65494
...Abstract Abstract Flow over arrays of cubes is an extensively studied model problem for rough wall turbulent boundary layers. While considerable research has been performed in computationally investigating these topologies using DNS and LES, the ability of sublayer-resolved RANS to predict...
Proceedings Papers

Proc. ASME. FEDSM2020, Volume 3: Computational Fluid Dynamics; Micro and Nano Fluid Dynamics, V003T05A026, July 13–15, 2020
Paper No: FEDSM2020-20336
...-dimensional room, using a commercial CFD (Computational Fluid Dynamics) software package which employs the Finite Volume Method. A LES (Large-Eddy Simulations) formulation with Smagorinsky SGS (Sub-Grid Scale) model is used. All fluid properties are assumed to be constant and corresponding to those of air...
Proceedings Papers

Proc. ASME. FEDSM2020, Volume 2: Fluid Mechanics; Multiphase Flows, V002T03A041, July 13–15, 2020
Paper No: FEDSM2020-20254
... simulations we have found that after a complete parametric study, a correlation was formed between turbulent flow parameters and optical parameters of interest. Keywords: LES, CFD, Atmospheric Turbulence NOMENCLATURE Large-Eddy Simulations Courant-Friedrichs-Lewy condition Velocity Velocity Fluctuation...
Proceedings Papers

Proc. ASME. AJKFluids2019, Volume 1: Fluid Mechanics, V001T01A053, July 28–August 1, 2019
Paper No: AJKFluids2019-5506
.... Keywords: CFD, Turbulence Model, LES, HHSTT, Hypersonic, Supersonic, High-Speed Test Track INTRODUCTION Operated by the 846th Test Squadron (TS), the Holloman High-Speed Test Track (HHSTT) at the Holloman Air Force Base (HAFB), New Mexico is the world's premier facility for testing full-scale high-speed...
Proceedings Papers

Proc. ASME. AJKFluids2019, Volume 2: Computational Fluid Dynamics, V002T02A052, July 28–August 1, 2019
Paper No: AJKFluids2019-4920
...Hybrid RANS-LES Simulation of Turbulent Heat Transfer in a Channel Flow with Imposed Spanwise and Streamwise Mean Temperature Gradient Olalekan O. Shobayo and D. Keith Walters School of Aerospace and Mechanical Engineering University of Oklahoma Norman, OK 73019 USA ABSTRACT Computational fluid...
Proceedings Papers

Proc. ASME. AJKFluids2019, Volume 3A: Fluid Applications and Systems, V03AT03A012, July 28–August 1, 2019
Paper No: AJKFluids2019-5521
... rate chemistry typically yields more accurate predictions, they depend significantly on the detailed kinetics mechanism used. To demonstrate the effect, Large Eddy Simulation (LES) of Sandia Flame D [1] has been performed using various combustion models. Four different detailed kinetics mechanisms have...
Proceedings Papers

Proc. ASME. AJKFluids2019, Volume 4: Fluid Measurement and Instrumentation; Micro and Nano Fluid Dynamics, V004T04A012, July 28–August 1, 2019
Paper No: AJKFluids2019-5493
... alone and both turbines operating in series. The field measurements include meteorological evaluation tower (MET) data and light detection and ranging (lidar) data. Computations were performed by coupling large eddy simulations (LES) in the three-dimensional, transient code Nalu-Wind with engineering...
Proceedings Papers

Proc. ASME. FEDSM2012, Volume 1: Symposia, Parts A and B, 291-295, July 8–12, 2012
Paper No: FEDSM2012-72362
... of the building model matched with those measured by the pressure taps, some aspects of the airflow velocity profile were not in agreement with the PIV data. The computational modeling of the wind flow around the building was then performed using the Large-Eddy Simulation (LES) approach. The mean velocity...
Proceedings Papers

Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 507-514, July 24–29, 2011
Paper No: AJK2011-06091
... fans. In this paper, 3D simulation has been done on flow field of counter-rotating fans for heat exchange, and the method of large eddy simulation (LES) and FW-H acoustic model have been used to simulate the distribution of noise field. The frequency spectrum from different sound sources has been...
Proceedings Papers

Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 203-209, July 24–29, 2011
Paper No: AJK2011-06041
... noise FH-W LES Proceedings of ASME-JSME-KSME Joint Fluids Engineering Conference 2011 AJK2011-FED July 24-29, 2011, Hamamatsu, Shizuoka, JAPAN AJK2011-06041 EXPERIMENTAL AND NUMERICAL INVESTIGATION OF BLADES EFFECT ON AERODYNAMIC PERFORMANCE OF SMALL AXIAL FLOW FAN Zhang Li Faculty...
Proceedings Papers

Proc. ASME. FEDSM2010, ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 1, Symposia – Parts A, B, and C, 2549-2555, August 1–5, 2010
Paper No: FEDSM-ICNMM2010-30739
... In this research the flow field obtained by LES technique is compared with laboratory data measured around a low rise building model with 1:1:0.3 (length: width: height) aspect ratio. The results also are compared with some other turbulence models. The turbulence models include standard k-ε...
Proceedings Papers

Proc. ASME. FEDSM2010, ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 1, Symposia – Parts A, B, and C, 289-293, August 1–5, 2010
Paper No: FEDSM-ICNMM2010-30768
... as the Large Eddy Simulations (LES). Particular attention was given to the case with Reynolds number of 80,000 for which the experimental data of Hussein and Matinuzzi [1] are available. The nature of the 3D wakes behind the cube as well as the vortices in front and at the back of the cube were investigated...
Proceedings Papers

Proc. ASME. FEDSM2002, Volume 2: Symposia and General Papers, Parts A and B, 597-604, July 14–18, 2002
Paper No: FEDSM2002-31370
... 04 03 2009 A grid-free method for the LES of turbulent incompressible flow is presented. The computational engine is based on the Lagrangian Vortex Element Method to account for the dynamics of the resolved vorticity field and the Vorticity Redistribution Method (VRM) to account...
Proceedings Papers

Proc. ASME. FEDSM2002, Volume 1: Fora, Parts A and B, 1173-1178, July 14–18, 2002
Paper No: FEDSM2002-31352
...@caltech.edu sible flow, LES, dynamic model of the vortices at the downstream edge, the transmission of acoustic waves upstream, and their conversion to votical fluctuations at the cavity leading edge. This feedback process is first investigated by Rossiter [1]. His semi-empirical formula to predict...
Proceedings Papers

Proc. ASME. HT-FED2004, Volume 2, Parts A and B, 391-399, July 11–15, 2004
Paper No: HT-FED2004-56165
...-56165London SW7 2BY UK s.lardeau@imperial.ac.uk F-86962 Futuroscope Chasseneuil jean-paul.bonnet@lea.univ-poitiers.fr Keywords: Inflow conditions, LES, Linear Stochastic Estimation, Proper Orthogonal Decomposition ABSTRACT Due to the difficulty of specifying realistic inflow conditions for numerical...
Proceedings Papers

Proc. ASME. HT-FED2004, Volume 2, Parts A and B, 715-725, July 11–15, 2004
Paper No: HT-FED2004-56356
... The paper provides a view of some developments and a perspective on the future role of the Reynolds-averaged Navier-Stokes (RANS) approach in the computation of turbulent flows and heat transfer in competition with Large-eddy simulations (LES). It is argued that RANS will further play...
Proceedings Papers

Proc. ASME. FEDSM2003, Volume 2: Symposia, Parts A, B, and C, 1887-1894, July 6–10, 2003
Paper No: FEDSM2003-45334
... adjusts the necessary modelling for the unresolved scales while the larger (resolved) scales are computed as in traditional LES. However, FSM is distinctly different from LES in that it allows for a consistent transition between (unsteady) RANS, LES, and DNS within the same simulation depending...
Proceedings Papers

Proc. ASME. FEDSM2005, Volume 1: Symposia, Parts A and B, 833-845, June 19–23, 2005
Paper No: FEDSM2005-77185
... eddy simulations (LES) of the two-phase air-water mixer. The impeller-induced flow at the blade tip radius is modeled by using sliding mesh method. The results demonstrate the existence of large structures such as tip-vortex tips, and also some finer details. In addition, the stability of the jet...