Adaptive remeshing for compressible flow computations

Peraire, J.; Vahdati, Mehdi; Morgan, K.; Zienkiewicz, O.C.

doi:10.1016/0021-9991(87)90093-3

Cited by 925 publications

(395 citation statements)

References 5 publications

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“…Although a variety of mesh generation techniques are available [21], the generation of a suitable mesh for complex, multielement, geometries is still a complex and tedious task. The two traditional approaches are: the use of a structured body-fitted mesh utilising a multi-block structure, in which the blocks may overlap, [22,23,24,25] and the use of a completely unstructured body-fitted mesh [26,27,28]. Both of these approaches require significant effort to ensure that the generated mesh is of sufficient quality to both accurately represent the geometry and provide a high quality solution.…”

Section: Clash -Evk3-ct-2001-00058mentioning

confidence: 99%

Estudo do Galgamento de Estruturas Marítimas utilizando um Modelo Numérico baseado na Teoria da Onda em Condições de Água pouco Profunda

Reis¹,

Neves²

2010

RGCI

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The main objective of Workpackage 5 is to use numerical simulation of wave overtopping in order to solve the problem of suspected scale effects. A second, related, objective is to improve existing codes in such a way as they are able to simulate wave overtopping in a reliable way. The final, single, objective is to numerically model long waves on the shallow foreshore at Petten in order to understand the phenomenon of long waves and their effect on overtopping. This report deals with the work undertaken towards the first two objectives, the simulations undertaken for objective 3 are the subject of a separate report entitled "Influence of low-frequency waves on wave overtopping" by M.R.A. van Gent and C.C. Giarrusso and published by WL | Delft hydraulics in November 2003.Realistic simulations of wave overtopping require numerical methods which are able accurately to simulate the shoaling, breaking and possible overturning of waves prior to their impact on the seawall. It is a further requirement that the simulation continues after impact, modelling the formation of the overtopping jet and the reflection of the wave. The research groups at Manchester Metropolitan University (MMU) and the University of Gent (UGent) have been working in parallel on the development of such numerical codes. The MMU code, AMAZON-SC, is a numerical wave flume based on the free surface capturing approach. While the UGent code, LVOF, is a numerical wave basin based on the volume of fluid approach. This report describes the progress of these numerical methods, in order to address the first two objectives of Workpackage 5. Their application to various cases, is also discussed, including: a test problem involving wave overtopping of a smooth sea-dike, wave overtopping at Samphire Hoe and an investigation of scale effects on rough impermeable structures.The Report begins with a general introduction, followed by a section describing AMAZON-SC (the MMU code), a section describing LVOF (the UGent code) and then some general conclusions.

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Section: Clash -Evk3-ct-2001-00058mentioning

confidence: 99%

Estudo do Galgamento de Estruturas Marítimas utilizando um Modelo Numérico baseado na Teoria da Onda em Condições de Água pouco Profunda

Reis¹,

Neves²

2010

RGCI

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“…Hybrid methods 18 treat the highly anisotropic regions of the domain as separate semi-structured zones lacking the generality to treat changes in the topology of these anisotropic regions off body. Global 19 and local 20 regeneration can suffer from the same robustness issues as initial grid generation. Methods that apply isotropic techniques in a metric mapped space have been successful in two dimensions (2D).…”

Section: -14mentioning

confidence: 99%

“…19,[21][22][23][24] The metric-based adaptation process has two principle components: determining an improved resolution request and creating an improved grid that satisfies that request. The improved resolution request is commonly based on local error estimates 17,19,25,26 and can include the effect of local errors on a global output quantity. 11,27,28 The use of anisotropic grid metrics has become a very standard way to specify a resolution request, but it does have limitations.…”

Section: -14mentioning

confidence: 99%

Parallel Anisotropic Tetrahedral Adaptation

Park¹,

Darmofal

2008

46th AIAA Aerospace Sciences Meeting and Exhibit

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An adaptive method that robustly produces high aspect ratio tetrahedra to a general 3D metric specification without introducing hybrid semi-structured regions is presented. The elemental operators and higher-level logic is described with their respective domaindecomposed parallelizations. An anisotropic tetrahedral grid adaptation scheme is demonstrated for 1000-1 stretching for a simple cube geometry. This form of adaptation is applicable to more complex domain boundaries via a cut-cell approach as demonstrated by a parallel 3D supersonic simulation of a complex fighter aircraft. To avoid the assumptions and approximations required to form a metric to specify adaptation, an approach is introduced that directly evaluates interpolation error. The grid is adapted to reduce and equidistribute this interpolation error calculation without the use of an intervening anisotropic metric. Direct interpolation error adaptation is illustrated for 1D and 3D domains.

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“…An optimal mesh is obtained when the Root-Mean-Square error is equidistributed over the elements, that is (Peraire et al, 1987):…”

Section: Error Estimationmentioning

confidence: 99%

An adaptive mesh strategy for high compressible flows based on nodal re-allocation

Bono¹,

Awruch²

2008

J. Braz. Soc. Mech. Sci. & Eng.

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Adaptive remeshing for compressible flow computations

Cited by 925 publications

References 5 publications

Estudo do Galgamento de Estruturas Marítimas utilizando um Modelo Numérico baseado na Teoria da Onda em Condições de Água pouco Profunda

Estudo do Galgamento de Estruturas Marítimas utilizando um Modelo Numérico baseado na Teoria da Onda em Condições de Água pouco Profunda

Parallel Anisotropic Tetrahedral Adaptation

An adaptive mesh strategy for high compressible flows based on nodal re-allocation

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