Results 221 to 230 of about 3,003 (261)
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LES at Work: Quality Management in Practical Large-Eddy Simulations
2008This paper aims at reviewing some important aspects of Large Eddy Simulation (LES) as applied to engineering applications. In particular we focus on aspects relevant to quality management and validation and verification procedures. After outlining the LES formalism and the numerical methods considered appropriate for engineering applications we discuss
Christer Fureby, Rickard E. Bensow
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Large Eddy Simulation (LES) for Steady-State Turbulent Flow Prediction
2014The aim of this work is to simulate a steady turbulent flow using the Large Eddy Simulation (LES) technique in computational fluid dynamics (CFD). The simulation was done using an in-house code developed in the programming platform of Visual C++. The Finite Volume Method was used to compute numerically the solutions of the Navier-Stokes equation under ...
T. Ganesan, M. Awang
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Journal of Fluids Engineering, 2002
We present a new implementation of the spectral vanishing viscosity method appropriate for alternative formulations of large-eddy simulations. We first review the method and subsequently present results for turbulent incompressible channel flow.
Robert M. Kirby, George Em Karniadakis
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We present a new implementation of the spectral vanishing viscosity method appropriate for alternative formulations of large-eddy simulations. We first review the method and subsequently present results for turbulent incompressible channel flow.
Robert M. Kirby, George Em Karniadakis
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Very-Large Eddy Simulation (V-LES) of the flow across a tube bundle
Nuclear Engineering and Design, 2011A new turbulence modelling approach (Very-Large Eddy Simulation; V-LES) is developed and compared to conventional RANS and LES for a flow across a tube bundle. The method, which belongs to the large-scale simulation category, represents a good compromise between efficiency and precision, and may thus be used for industrial problems for which LES ...
Mathieu Labois, Djamel Lakehal
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A family of large eddy simulation (LES) filters with nonuniform filter widths
Physics of Fluids, 1995In this Brief Communication a family of filters for large eddy simulation (LES) with nonuniform filter widths is constructed that commute with differentiation up to any given order.
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Analysis of Compound Open Channel Flow Using Large Eddy Simulation (LES)
Ecology and Resilient Infrastructure, 2017 본 연구는 OpenFOAM의 large eddy simulation (LES)를 이용하여 복단면 흐름을 분석하였다. LES는 여과된 연속방정식과 운동량 방정식을 수치적으로 해석하였다. 일방정식 LES와 비균일 격자를 적용하여 벽 부근의 난류 비등방성과 이차류를 재현하였다. 복단면 개수로 난류의 LES 결과는 홍수터의 수심이 깊은 경우와 얕은 경우에 대해서 제시하였다. 이들 결과는 실험 결과와 비교하였으며 실험결과와 계산 결과는 부합되는 양상을 보여준다. 또한 이차류를 생성하는 난류 비등방성의 역할에 대해서 제시하고 있다.
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A Large Eddy Simulation (LES) of Plate-Fin and Tube Heat Exchangers
2010 14th International Heat Transfer Conference, Volume 4, 2010Plate-fin and tube heat exchangers are extensively studied both experimentally and numerically. With a large eddy simulation technique (LES), this study performs a detailed investigation of the temporal oscillations of streamwise, spanwise and normal velocity components in the exchanger passage and their effects on heat transfer between fins and fluid.
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Parametric studies on acoustics of corrugated tubes using large eddy simulation (LES)
Noise Control Engineering Journal, 2014Airflow through a corrugated tubing can generate loud tonal sounds. The production of these tones, sometimes called as whistling, in a corrugated tubing is an interesting phenomenon because the presence of corrugations in a straight tube transforms the tube into an aerodynamic sound source that may produce significant tones and resonance responses ...
B. Rajavel, M.G. Prasad
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Large Eddy Simulation of Unsteady Flow in the LE-7A Liquid Hydrogen Pump
43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2007The prediction of vibration generated from the turbopump is becoming increasingly important in rocket engine development. In some cases, the vibration of the turbopump originates from the interaction between the rotating impeller and the stationary parts such as diffuser vanes and casing tongues.
Nobuhiro Yamanishi +3 more
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Board level thermal analysis via Large Eddy Simulation (LES) tool
The Ninth Intersociety Conference on Thermal and Thermomechanical Phenomena In Electronic Systems (IEEE Cat. No.04CH37543), 2004Large Eddy Simulation (LES) is a step beyond widely used Reynolds Averaged Navier Stokes formulation (RANS) with turbulence model. LES is unsteady, therefore, predicts evolution of turbulent eddies in time. The only physic that is not resolved is the evolution of so-called sub-grid eddies, these are turbulent eddies smaller then local grid resolution ...
F. Roknaldin, A. Panigrahy
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