Large Eddy Simulation of Rotor-Stator Cavity Flow11This research was supported by National Science Council of Taiwan NSC 90-2212-E-007-058 and the computational facilities were provided by the National Centre for High-Performance Computing of Taiwan which the authors gratefully acknowledge.

2003 ◽  
pp. 547-554
Author(s):  
Weng P.S. ◽  
Lo W. ◽  
C.A. Lin
Keyword(s):  
Large Eddy Simulation ◽  
High Performance Computing ◽  
High Performance ◽  
Eddy Simulation ◽  
National Centre ◽  
Large Eddy ◽  
National Science ◽  
Performance Computing ◽  
National Science Council

Development of an Unsteady Aerodynamic Simulator Using Large-Eddy Simulation Based on High-Performance Computing Technique

2009 ◽  
Vol 2 (1) ◽  
pp. 168-178 ◽  
Author(s):  
Makoto Tsubokura ◽  
Takuji Nakashima ◽  
Kozo Kitoh ◽  
Yoshihiro Sasaki ◽  
Nobuyuki Oshima ◽  
...  
Keyword(s):  
Large Eddy Simulation ◽  
High Performance Computing ◽  
High Performance ◽  
Computing Technique ◽  
Unsteady Aerodynamic ◽  
Eddy Simulation ◽  
Simulation Based ◽  
Large Eddy ◽  
Performance Computing

High performance computing of the Darmstadt stratified burner by means of large eddy simulation and a joint ATF-FGM approach

2013 ◽  
Vol 16 (2) ◽  
pp. 77-88 ◽  
Author(s):  
Amer Avdić ◽  
Guido Kuenne ◽  
Anja Ketelheun ◽  
Amsini Sadiki ◽  
Suad Jakirlić ◽  
...  
Keyword(s):  
Large Eddy Simulation ◽  
High Performance Computing ◽  
High Performance ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Performance Computing

Current Status on High Performance Computing for Vehicle Aerodynamics Using Large Eddy Simulation

2007 ◽  
Author(s):  
Makoto Tsubokura ◽  
Takuji Nakashima ◽  
Nobuyuki Oshima ◽  
Kozo Kitoh ◽  
Huilai Zhang ◽  
...  
Keyword(s):  
Large Eddy Simulation ◽  
High Performance ◽  
Current Status ◽  
Navier Stokes ◽  
Eddy Simulation ◽  
The Earth ◽  
Wind Tunnel Measurement ◽  
Large Eddy ◽  
Vehicle Aerodynamics ◽  
Performance Computing

The world’s largest class unsteady turbulence simulations of flow around vehicles were conducted using Large Eddy Simulation (LES) on the Earth Simulator in Japan. The main objective of our study is to investigate the validity of LES, as an alternative to a conventional wind tunnel measurement or the Reynolds Averaged Navier-Stokes method, for the assessment of vehicle aerodynamics.

The structure of self-sustained instability, transition and turbulence in the separating boundary layer under an internal solitary wave of depression

2021 ◽  
Author(s):  
Peter Diamessis ◽  
Takahiro Sakai ◽  
Gustaaf Jacobs
Keyword(s):  
Boundary Layer ◽  
Large Amplitude ◽  
High Performance ◽  
Separation Bubble ◽  
Computational Cost ◽  
Three Dimensional ◽  
Instability Mode ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Performance Computing

<p>The development of the separated bottom boundary layer (BBL) in the footprint of a large-amplitude ISW of depression is examined using high-accuracy/resolution implicit Large Eddy Simulation. The talk will focus on a single relatively idealized case of a large-amplitude ISW propagating against an oncoming barotropic current with its own, initially laminar, BBL under the inevitable restriction of laboratory-scale Reynolds number. Significant discussion will be dedicated to the non-trivial computational cost of setting up and conducting the above simulation, within long domains and over long-integration times, in a high-performance-computing environment. Results will focus on documenting the full downstream evolution of the structure of the separated BBL development. Particular emphasis will be placed on the existence of a three-dimensional global instability mode, at the core of the separation bubble where typically one might assume two-dimensional dynamics. The particular instability mode is spontaneously excited and is considered responsible for the self-sustained nature of the resulting near-bed turbulent wake in the lee of the ISW. Fundamental mean BBL flow metrics will then be presented along with a short discussion for potential for particulate resuspension. The talk will close with a discussion of the relevance of the existing flow configuration to both the laboratory and ocean, in light of recent measurements in the NW Australian Shelf.<br><br></p>

scholarly journals Towards Massively Parallel Large Eddy Simulation of Turbine Stages

2013 ◽  
Author(s):  
Gaofeng Wang ◽  
Dimitrios Papadogiannis ◽  
Florent Duchaine ◽  
Nicolas Gourdain ◽  
Laurent Y. M. Gicquel
Keyword(s):  
Experimental Data ◽  
Large Eddy Simulation ◽  
Gas Turbine ◽  
High Performance ◽  
Fluid Dynamic ◽  
Rotor Blades ◽  
Massively Parallel ◽  
High Fidelity ◽  
Eddy Simulation ◽  
Large Eddy

The context of integrated numerical simulations of gas turbine engines by use of high-fidelity Computational Fluid Dynamic (CFD) tools recently emerged as a promising path to improve engines design and understanding. Relying on massively parallel super-computing such propositions still have to prove feasibility to efficiently take advantage of the ever increasing computing power made available worldwide. Although Large Eddy Simulation (LES) has recently proven its superiority in the context of the combustion chamber of gas turbine, methodologies need to be developed and start addressing the problem of the turbomachinery stages, if integrated simulations based on LES are to be foreseen. In the proposed work an in-house code and strategy, called TurboAVBP, is developed for turbomachinery LES thanks to the coupling of multi-copies of the unstructured compressible reacting LES solver AVBP, designed to run efficiently on high performance massively parallel architectures. Aside from the specificity of such wall bounded flows, rotor/stator LES type simulations require specific attention and the interface should not interfere with the numeric scheme to preserve proper representation of the unsteady physics crossing this interface. A tentative LES compliant solution based on moving overset grids method is proposed and evaluated in this work for high-fidelity simulation of the rotor/stator interactions. Simple test cases of increasing difficulty with reference numerical are detailed and prove the solution in handling acoustics, vortices and turbulence. The approach is then applied to the QinetiQ MT1 high-pressure transonic turbine for comparison with experimental data. Two configurations are computed: the first one is composed of 1 scaled stator section and 2 rotors while the second computation considers the geometrically accurate periodic quarter of the machine, i.e. 8 stators and 15 rotors to test scalability issues of such applications. Although under-resolved, the LES pressure profiles on the stator and rotor blades appear to be in good agreement with experimental data and are quite competitive compared to the traditional (Unsteady) Reynolds-Averaged Navier-Stokes (RANS or URANS) modeling approach. Unsteady features inherently present in these LES underline the complexity of the flow in a turbine stage and clearly demand additional diagnostics to be properly validated.

scholarly journals Industry-Relevant Implicit Large-Eddy Simulation of a High-Performance Road Car via Spectral/hp Element Methods

SIAM Review ◽  
2021 ◽  
Vol 63 (4) ◽  
pp. 723-755
Author(s):  
Gianmarco Mengaldo ◽  
David Moxey ◽  
Michael Turner ◽  
Rodrigo Costa Moura ◽  
Ayad Jassim ◽  
...  
Keyword(s):  
Large Eddy Simulation ◽  
High Performance ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Implicit Large Eddy Simulation
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