Hybrid RANS/LES Simulation of a Supersonic Coaxial He/Air Jet Experiment at Various Turbulent Lewis Numbers

Charrier, Lorris; Pont, Grégoire; Marié, Simon; Brenner, Pierre; Grasso, Francesco

doi:10.1007/978-3-319-70031-1_28

Cited by 4 publications

(5 citation statements)

References 7 publications

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“…However, these authors also report a strong overestimation of turbulent mixing which is attributed to the settings of turbulence generation and to the use of a too dissipative numerical scheme. Another attempt to improve RANS/LES prediction for supersonic coaxial jet was proposed in [23] with the use of a variable Sc t /P r t model. Such an approach led to an overestimation of turbulent mixing for locations after 10 center jet diameters.…”

Section: Review Of Turbulent Mass Diffusion Modelling Techniquesmentioning

confidence: 99%

“…In order to contribute to the development of advanced numerical methods for bi-species supersonic mixing layers, two bi-species ZDES [22] computations are performed in this study on a well-known supersonic coaxial jets experiment run by Cutler et al [27,1] and reproduced numerically by several authors in the past with RANS [1,18] or RANS/LES formulations [17,23,19,21]. To meet the numerical challenges described above, the computations are run with an original hybrid numerical scheme [28] based on Ducros's sensor [29] associated to a low dissipation version of the AUSM scheme [30,31].…”

Section: Review Of Turbulent Mass Diffusion Modelling Techniquesmentioning

confidence: 99%

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A comprehensive framework for high fidelity computations of two-species compressible turbulent flows

Reynaud

Weiss

Deck

et al. 2022

Journal of Computational Physics

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Section: Review Of Turbulent Mass Diffusion Modelling Techniquesmentioning

confidence: 99%

Section: Review Of Turbulent Mass Diffusion Modelling Techniquesmentioning

confidence: 99%

A comprehensive framework for high fidelity computations of two-species compressible turbulent flows

Reynaud

Weiss

Deck

et al. 2022

Journal of Computational Physics

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“…In Figs. [21][22][23][24], dashed curves correspond to |V gN |/|c| >> 1, which represents discontinuity of dispersion φ j , and grey zones correspond to negative group velocity V gN j < 0. Remark: The choice of the CFL domain is dictated by the desire to compare several schemes.…”

Section: Analysis Of Q−wavesmentioning

confidence: 99%

“…This solver, developed by ArianeGroup, is used in the certification process of launchers during take-off and reentry, when complex physical phenomena occur. During the last years, the solver received attention and was the subject of many improvements [21,22,23,24,25,26] .…”

Section: Introductionmentioning

confidence: 99%

A coupled implicit-explicit time integration method for compressible unsteady flows

Muscat

Puigt

Montagnac

et al. 2019

Journal of Computational Physics

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This paper addresses how two time integration schemes, the Heun's scheme for explicit time integration and the second-order Crank-Nicolson scheme for implicit time integration, can be coupled spatially. This coupling is the prerequisite to perform a coupled Large Eddy Simulation / Reynolds Averaged Navier-Stokes computation in an industrial context, using the implicit time procedure for the boundary layer (RANS) and the explicit time integration procedure in the LES region. The coupling procedure is designed in order to switch from explicit to implicit time integrations as fast as possible, while maintaining stability. After introducing the different schemes, the paper presents the initial coupling procedure adapted from a published reference and shows that it can amplify some numerical waves. An alternative procedure, studied in a coupled time/space framework, is shown to be stable and with spectral properties in agreement with the requirements of industrial applications. The coupling technique is validated with standard test cases, ranging from one-dimensional to three-dimensional flows.

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“…It must be underlined that the adaptive version of the Heun's scheme was briefly described in Reference 15, and the full description of the scheme implemented in FLUSEPA, including mathematical properties, is also one objective of the article. As shown in References 16‐20, the time adaptive procedure is the basic time integration ingredient used in research and industrial applications with FLUSEPA. Mathematical analysis including order of accuracy, stability, and spectral behavior is then presented.…”

Section: Introductionmentioning

confidence: 99%

Mathematical analysis of the spatial coupling of an explicit temporal adaptive integration scheme with an implicit time integration scheme

Muscat

Puigt

Montagnac

et al. 2020

Numerical Methods in Fluids

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The Reynolds‐averaged Navier–Stokes equations and the large eddy simulation equations can be coupled using a transition function to switch from a set of equations applied in some areas of a domain to the other set in the other part of the domain. Following this idea, different time integration schemes can be coupled. In this context, we developed a hybrid time integration scheme that spatially couples the explicit scheme of Heun and Crank–Nicolson's implicit scheme using a dedicated transition function. This scheme is linearly stable and second‐order accurate. In this article, an extension of this hybrid scheme is introduced to deal with a temporal adaptive procedure. The idea is to treat the time integration procedure with unstructured grids as it is performed with Cartesian grids and local mesh refinement. Depending on its characteristic size, each mesh cell is assigned to a rank. And for two cells from two consecutive ranks, the ratio of the associated time steps for time marching the solutions is 2. As a consequence, the cells with the lowest rank iterate more than the other ones to reach the same physical time. In a finite‐volume context, a key ingredient is to keep the conservation property for the interfaces that separate two cells of different ranks. After introducing the different schemes, the article recalls briefly the coupling procedure, and details the extension to the temporal adaptive procedure. The new time integrator is validated with the propagation of 1D wave packet, the Sod's tube, and the advection of 2D vortex.

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Hybrid RANS/LES Simulation of a Supersonic Coaxial He/Air Jet Experiment at Various Turbulent Lewis Numbers

Cited by 4 publications

References 7 publications

A comprehensive framework for high fidelity computations of two-species compressible turbulent flows

A comprehensive framework for high fidelity computations of two-species compressible turbulent flows

A coupled implicit-explicit time integration method for compressible unsteady flows

Mathematical analysis of the spatial coupling of an explicit temporal adaptive integration scheme with an implicit time integration scheme

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