Theoretical and numerical analysis of nonconforming grid interface for unsteady flows

Vanharen, Julien; Puigt, Guillaume; Montagnac, Marc

doi:10.1016/j.jcp.2015.01.013

Cited by 4 publications

(1 citation statement)

References 36 publications

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“…The method for coupling a block-structured zone to an unstructured depends on the restrictions placed on the interface ( 23 ) . The most restrictive case is the one where the interface is required to be conformal.…”

Section: Hybrid Methods Implementationmentioning

confidence: 99%

An implicit hybrid method for the computation of rotorcraft flows

Woodgate

Barakos

2018

Aeronaut. j.

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There is a wide variety of CFD grid types including Cartesian, structured, unstructured and hybrids, as well as, numerous methodologies of combining these to reduce the time required to generate high-quality grids around complex configurations. If the grid methodologies were implemented in different codes, they should be written in such a way as to obtain the maximum performance from the available computer resources. A common interface should also be required to allow for ease of use. However, it is very time consuming to develop, maintain and add extra functionally to different codes. This paper examines the possibility of taking an existing CFD solver, the Helicopter Multi-Block (HMB) CFD method, and implementing a new grid type while reusing as much as possible the original code base. The paper presents some of the challenges encountered in extending the code which was written for a single mesh type, to a more flexible solver that is still computationally efficient but can cope with a variety of grid types.

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Section: Hybrid Methods Implementationmentioning

confidence: 99%

An implicit hybrid method for the computation of rotorcraft flows

Woodgate

Barakos

2018

Aeronaut. j.

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Non-manifold anisotropic mesh adaptation: application to fluid–structure interaction

Vanharen

Loseille

Alauzet

2021

Engineering with Computers

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Optimized compact finite volume formulation with dispersion relation preserving characteristics in structured space discretizations

Gutierrez Pimenta,

Lopes,

Maldonado

et al. 2024

International Journal of Aeroacoustics

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Computationally extensive fluid flow simulations usually require numerical schemes with a high degree of numerical precision, where high wavenumber and frequency capturing capability is desired in solutions with high physical fidelity. Numerical dispersion and diffusion errors must be reduced to a minimum in order to caputre low amplitude and high frequency flow aspects, such as flow induced sound waves and minor instabilities. Such schemes also must be capable of dealing with flow discontinuities, such as shockwaves and expansion waves in cases where the flow velocity stands near or above sound velocity. In this work the Dispersion Relation Preserving (DRP) optimization is formally extended to the compact Finite Volume (FV) framework where the error is minimized along a given spectral interval. This is done by equaling the resulting algebraic compact spectral optimized Finite Difference (FD) operators with the Finite Volume formulation with the desired numeric characteristics. Numerical tests are carried over linear and nonlinear governing equations models for one and three-dimensional cases, where the travelling Gaussian wave, the transient expansion wave and the smooth to nonsmooth step wave flows are considered. The proposed compact DRP FV schemes surpasses its counterparts in some numerical tests while maintaining comparable capabilities with other more basic schemes in the remaining numerical tests. Excellent broadband content capturing capability is observed, while possessing reduced numerical instabilities generation.

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Theoretical and numerical analysis of nonconforming grid interface for unsteady flows

Cited by 4 publications

References 36 publications

An implicit hybrid method for the computation of rotorcraft flows

An implicit hybrid method for the computation of rotorcraft flows

Non-manifold anisotropic mesh adaptation: application to fluid–structure interaction

Optimized compact finite volume formulation with dispersion relation preserving characteristics in structured space discretizations

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