hp Discontinuous Galerkin Method for Computational Aeroacoustics

Peyret, Christophe; Delorme, Ph

doi:10.2514/6.2007-3475

Cited by 5 publications

(3 citation statements)

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“…The standalone SPACE code has already been carefully numerically assessed in terms of dispersion, dissipation and convergence error [31], and also applied to academic validation cases such as a convected isentropic vortex [29], diffraction by one or multiple circular obstacles [31], duct acoustic propagation [43] and wave propagation in a sheared flow [32].…”

Section: Computational Aeroacousticsmentioning

confidence: 99%

“…Consequently, the methodology has to deal with both the disparity of scheme order between the NS and the Euler regions, and a significant grid stretching near the coupling interface in the Euler region, which induces an accuracy discontinuity and can lead to spurious numerical oscillations [31]. An order mapping method (also called hp-adaptation) is used in the Euler region associated with the DG solver [43]. In order to illustrate the locally adapting element order, a part of the acoustic mesh further introduced in section 4 is shown in figure 3.…”

Section: High-order Scheme and Order Mappingmentioning

confidence: 99%

“…In particular, the order is lower where geometric details force mesh refinement in order to remain consistent in accuracy in the whole computational domain. It has been shown [31,43] that the order mapping enables a better compromise between numerical cost, accuracy and robustness.…”

Section: High-order Scheme and Order Mappingmentioning

confidence: 99%

See 2 more Smart Citations

Assessment of a Two-Way Coupling Methodology Between a Flow and a High-Order Nonlinear Acoustic Unstructured Solvers

Langenais

Vincent

Peyret

et al. 2018

Flow Turbulence Combust

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A two-way coupling on unstructured meshes between a flow and a high-order acoustic solvers for jet noise prediction is considered. The flow simulation aims at generating acoustic sources in the near field while the acoustic simulation solves the full Euler equations, thanks to a discontinuous Galerkin method, in order to take into account nonlinear acoustic propagation effects. This methodology is firstly validated on academic cases involving nonlinear sound propagation, shock waves and convection of aerodynamic perturbations. The results are compared to analytical solutions and direct computations. A good behaviour of the coupling is found regarding the targeted space applications. An application on a launch pad model is then simulated to demonstrate the robustness and reliability of the present approach.

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