Adaptive boundary layer meshing for viscous flow simulations

Sahni, Onkar; Jansen, Kenneth E.; Shephard, Mark S.; Taylor, Charles A.; Beall, Mark W.

doi:10.1007/s00366-008-0095-0

Cited by 69 publications

(72 citation statements)

References 33 publications

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“…It is a parallelization of mesh adaptation technique previously presented and proved the robustness of the method with the analysis of simulation results [11,12]. The advantage of this method is the ability to handle curved complex 3D geometries while being able to achieve a desired degree of anisotropy with inexpensive solution transfer process.…”

Section: Introductionmentioning

confidence: 94%

“…A common method to construct boundary layer meshes, referred to as the advancing layers method [12,15,17], inflates the unstructured surface mesh on no-slip walls, where boundary layers form. This inflation is done into the volume, along the local surface normals as a structured stack of layers, up to a specified distance and fills the rest of the domain with unstructured elements.…”

Section: Meshes With Boundary Layersmentioning

confidence: 99%

“…The boundary layer structure is decomposed as the product of a layer surface (2D) and thickness (1D) mesh [12]. The mesh composed of triangles located at the top of each layer is referred to as layer surface, while the lines orthogonal to the wall composed of edges are called growth curves (see Figure 1(a)).…”

Section: Meshes With Boundary Layersmentioning

confidence: 99%

“…In these regions carefully constructed boundary layers that consider the physics of the flow and the abilities of the flow models used result in the most effective means to construct the local portions of the mesh [11][12][13][14]. The best method of construction of such boundary layer meshes is to decompose the mesh in an unstructured mesh in the "plane of the surface" and a graded and structured mesh in the normal direction [11,12,[15][16][17]. Layered structure of elements in boundary layer meshes near no-slip walls plays a critical role.…”

Section: Introductionmentioning

confidence: 99%

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Parallel Adaptive Boundary Layer Meshing for CFD Analysis

Ovcharenko

Chitale

Sahni

et al. 2013

Proceedings of the 21st International Meshing Roundtable

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Summary. This paper describes a parallel procedure for anisotropic mesh adaptation with boundary layers for use in scalable CFD simulations. The parallel mesh adaptation algorithm operates with local mesh modification operations developed for both unstructured and boundary layer parts of the mesh. The adaptive approach maintains layered elements near the viscous walls and accounts for the mesh modification operations that are carried out in parallel on a distributed mesh. In the process mesh relationships and approximations with respect to curved complex 3D geometries of interest are properly maintained. The parallel mesh adaptation procedures are applied to two problems: a heat transfer manifold and a scramjet engine.

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Section: Introductionmentioning

confidence: 94%

Section: Meshes With Boundary Layersmentioning

confidence: 99%

Section: Meshes With Boundary Layersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Parallel Adaptive Boundary Layer Meshing for CFD Analysis

Ovcharenko

Chitale

Sahni

et al. 2013

Proceedings of the 21st International Meshing Roundtable

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“…In addition to the CFD flow solver PHASTA, adaptive meshing [8,9,11,10] and mesh partitioning [7] techniques are other essential ingredients required to generate and partition significantly large (in the order of 5 billion or more elements) 3D unstructured finite element meshes for the target applications. Indeed, the application of reliable numerical simulations requires them to be executed in an automated manner with explicit control of the approximations made.…”

Section: Adaptive Mesh Control and Mesh Partitioningmentioning

confidence: 99%

Petascale, Adaptive CFD (ALCF ESP Technical Report): ALCF-2 Early Science Program Technical Report

Jansen¹,

Rasquin²

2013

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Metric field construction for anisotropic mesh adaptation with application to blood flow simulations

Sauvage

Remacle

Marchandise

2014

Numer Methods Biomed Eng

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The goal of this paper is to generate an anisotropic metric field suitable for cardiovascular geometries before a fluid simulation. Starting from a curvature map, an initial surface metric field is computed. This metric is used for anisotropic surface mesh adaptation and consecutively extended inside the volume in a frontal manner. The algorithm is based on the method proposed by Alauzet but replaces the metric intersection steps by an original metric 'blending'. This allows for a graded anisotropic volume mesh with a refinement layer close to the walls. The benefits of the resulting mesh are multiple: a reduced number of degrees of freedom, a priori refinement in areas with strong gradients of velocity and automatically increased resolution in regions with high surface curvature. The primal application of this method is in the domain of cardiovascular flows. Flow fields and derived quantities (wall shear stress) through a model bypass around a stenosed artery obtained on an adapted and standard isotropic mesh are compared. In addition, the mesh generation method is tested on a more complex patient-specific geometry. Values of computed wall shear stress are shown to be close to values obtained on anisotropic Hessian-adapted mesh, demonstrating the computational efficiency of the approach in comparison with adaptation based on error indicators derived from flow field.

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Adaptive boundary layer meshing for viscous flow simulations

Cited by 69 publications

References 33 publications

Parallel Adaptive Boundary Layer Meshing for CFD Analysis

Parallel Adaptive Boundary Layer Meshing for CFD Analysis

Petascale, Adaptive CFD (ALCF ESP Technical Report): ALCF-2 Early Science Program Technical Report

Metric field construction for anisotropic mesh adaptation with application to blood flow simulations

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