A hybrid lattice Boltzmann - Navier-Stokes method for unsteady aerodynamic and aeroacoustic computations

Suss, Alexandre; Mary, Ivan; Garrec, Thomas Le; Marié, Simon

doi:10.1016/j.jcp.2023.112098

Cited by 4 publications

(15 citation statements)

References 68 publications

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“…). As proposed in [20], the communication is performed through halo exchange: each grid is extended with halo regions (or ghost-cells) where the flow solution is imposed by the facing numerical method. To be consistent with the finite volume scheme presented in Section II.A (which is based on a five-point stencil) two layers of ghost cells are added to each sub-zone making up the computational domain.…”

Section: A General Methodologymentioning

confidence: 99%

“…Using Equation (3), the density and velocity components of W are directly obtained by taking the discrete moments of the distribution functions. As discussed in [20], a rescaling step has to be performed before the exchange since the lattice Boltzmann and Navier-Stokes solvers are implemented in different systems of units. In addition, special handling must be made on the temperature.…”

Section: A General Methodologymentioning

confidence: 99%

“…Indeed, the aim of the present work is to enable the seamless switch between numerical methods across the grids making up the computational domain. In the following, the key components of the hybrid lattice Boltzmann -Navier-Stokes method introduced in [20] are recalled and adapted to an overset framework.…”

Section: Extension To the Hybrid Lattice Boltzmann -Navier-stokes Met...mentioning

confidence: 99%

“…Consequently, finite-volume Navier-Stokes methods might outperform the LBM in near-wall flow regions, benefiting from their great flexibility through the use of body-fitted anisotropic meshes or implicit time-stepping. Following this idea, a hybrid lattice Boltzmann -Navier-Stokes method has recently been proposed to perform efficient and accurate direct aerodynamic and aeroacoustic computations around complex geometries [20].…”

Section: Introductionmentioning

confidence: 99%

“…The present work aims to increase the flexibility of the hybrid lattice Boltzmann -Navier-Stokes method introduced in [20] by extending it to the case of overset grids. The idea is to apply a finite-volume Navier-Stokes method on structured body-fitted grids around obstacles (where high accuracy is usually required within the boundary layer) and to use the lattice Boltzmann method elsewhere on Cartesian grids so as to efficiently propagate acoustic waves or wakes.…”

Section: Introductionmentioning

confidence: 99%

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A hybrid lattice Boltzmann - Navier-Stokes method on overset grids

Suss

Mary

Garrec

et al. 2023

AIAA AVIATION 2023 Forum

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This paper presents an overset grid strategy in the context of a hybrid lattice Boltzmann -Navier-Stokes method for unsteady aerodynamic and aeroacoustic applications. While the overset grid approach is usually used to couple multiple overlapping grids with different mesh topologies together through interpolations, it is proposed to extend this methodology by enabling to switch between numerical methods across the grids making up the computational domain. Thereby, one can reach nearly optimal running conditions in terms of meshing strategy and numerical properties for the simulation of high Reynolds number flows. The key feature of this work lies in the way the information exchange is performed at the interface between the lattice Boltzmann method (applied on Cartesian grids) and the finite-volume Navier-Stokes method (dedicated to curvilinear meshes). All the numerical aspects of the coupling procedure are thoroughly discussed and the developed strategy is assessed on unsteady test cases representative of aerodynamic and aeroacoustic problems.

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Section: A General Methodologymentioning

confidence: 99%

Section: A General Methodologymentioning

confidence: 99%

Section: Extension To the Hybrid Lattice Boltzmann -Navier-stokes Met...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A hybrid lattice Boltzmann - Navier-Stokes method on overset grids

Suss

Mary

Garrec

et al. 2023

AIAA AVIATION 2023 Forum

Self Cite

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Generalized interpolation-supplemented cascaded lattice Boltzmann method for noise radiated from a circular cylinder

Song,

Hu,

et al. 2024

Journal of Computational Physics

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Highly underexpanded rarefied jet flows

2023

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A highly underexpanded jet outflow into the background in transition and scattering regimes is studied computationally. The direct simulation Monte Carlo method and Navier–Stokes equations are used. The main parameters’ impact on the jet flow is analyzed. It is shown that a drastic flow structure transformation occurs in a relatively narrow Reynolds numbers’ range, 5 ≤ ReL ≤ 30, featuring the jet–surrounding gas interaction. At ReL = 5, a shock wave structure that is typical for the underexpanded jet degenerates completely. The existing empirical expressions application for the estimation of the characteristic dimensions of the shock wave structure in the transition regime leads to significant inaccuracy. For the considered parameters’ range, the approaches based on the direct simulation Monte Carlo method and Navier–Stokes (NS) equations’ solution lead to similar results in the nozzle region, where the flow regime is hydrodynamic. Nevertheless, the NS approach employment for the assessment of flow parameters within rarefied shock layers is debatable.

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A hybrid lattice Boltzmann - Navier-Stokes method for unsteady aerodynamic and aeroacoustic computations

Cited by 4 publications

References 68 publications

A hybrid lattice Boltzmann - Navier-Stokes method on overset grids

A hybrid lattice Boltzmann - Navier-Stokes method on overset grids

Generalized interpolation-supplemented cascaded lattice Boltzmann method for noise radiated from a circular cylinder

Highly underexpanded rarefied jet flows

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