Composite Structured Mesh Generation With Automatic Domain Decomposition In Complex Geometries

Zhang, Yaoxin; Jia, Yafei; Wang, Sam S. Y.; Altinakar, Mustafa S.

doi:10.1080/19942060.2013.11015456

Cited by 7 publications

(6 citation statements)

References 10 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is a need to code in chromosomes of the individual in the beginning. A chromosome is represented by binary values val [2] on account of solving two variables at the same time. Traditional 32-bit binary string is used to be on behalf of float value between 0 and 1, indicating the proportional position of this point in the computational domain.…”

Section: Serial Optimization Algorithmmentioning

confidence: 99%

“…In global optimization, the number n of binary values pairs in the chromosome is a variable value, which is determined by the specific problems. A two-dimensional array is used to represent individuals in chromosomes, that is, val[n] [2]. Each binary string will be translated to a value between 0 and 1, indicating the proportional position of the point at the top or bottom edge.…”

Section: Global Optimization Algorithmmentioning

confidence: 99%

“…In general, there are two strategies of structured grid optimization. One is the domain decomposition method that divides a complicated domain into several sub-domains (blocks) with simpler and smaller shapes [2]. Sub-domains are easier to manipulate because it is possible to control grid quality within smaller units.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Automatic optimal block decomposition for structured mesh generation using genetic algorithm

Zhao

Liu

Zhang

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

This paper presents a novel system of evaluating the block quality in order to obtain the optimal block. Two algorithms for an automatic optimal block decomposition for complex geometries with arbitrary profiles based on genetic algorithm theory are proposed. One is serial optimization, which decomposes the domain according to a certain sequence. The other is global optimization, performed by optimizing all blocks simultaneously. The results will be demonstrated with an example of the basin of a turbine blade to indicate that two proposed optimization algorithms are capable of decomposing complex domains into a series of optimal structured blocks automatically in a matter of seconds. Compared to some commercial programs, the two optimization approaches not only significantly alleviate the difficulties of decomposing those domains, but also ensure the generated meshes with high quality. The quality among the blocks divided by serial optimization algorithm has a wider range. However, the global optimization algorithm can more efficiently give a decomposition scheme, in which the blocks have more even qualities.

show abstract

Section: Serial Optimization Algorithmmentioning

confidence: 99%

Section: Global Optimization Algorithmmentioning

confidence: 99%

See 1 more Smart Citation

Automatic optimal block decomposition for structured mesh generation using genetic algorithm

Zhao

Liu

Zhang

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…Various commercial software programs have been developed and applied to numeral calculations in recent years [11] , [12] , [13] , [14] . For example, HyperMesh can generate all the mesh types required in finite element calculations and ANSA is similar to HyperMesh.…”

Section: Introductionmentioning

confidence: 99%

Method for generating high-quality tetrahedral meshes of geological models by utilizing CGAL

Wang

Mei

2020

MethodsX

View full text Add to dashboard Cite

High-quality computational meshes are crucial in the analysis of displacements and stabilities of rock and soil masses. In this paper, we present a method for generating high-quality tetrahedral meshes of geological models to be used in stability analyses of rock and soil masses. The method is implemented by utilizing the Computational Geometry Algorithms Library (CGAL). The input is a geological model consisting of triangulated surfaces, and the output is a high-quality tetrahedral mesh of the geological model. To demonstrate the effectiveness of the presented method, we apply it to generate a series of computational meshes of geological model, and we then analyse the stabilities of the rock and soil slopes on the basis of the generated tetrahedral mesh models. The applications demonstrate the effectiveness and practicability of the present method. A method for generating high-quality tetrahedral meshes of geological models is presented. We evaluate the quality of the tetrahedral mesh of geological model using four metrics. Three applications demonstrate the effectiveness and practicability of the presented method.

show abstract

“…In addition, the time required for solving unstructured meshes in CFD problems is often higher than for the structured ones (Zhang, Jia, Wang, & Altinakar, 2013). The solver of choice has been OpenFOAM, which is a free, open source CFD software package based on the finite volume method.…”

Section: Introductionmentioning

confidence: 99%

On the applicability of 2D URANS and SSTk-ωturbulence model to the fluid-structure interaction of rectangular cylinders

Nieto

Hargreaves

Owen

et al. 2015

Engineering Applications of Computational Fluid Mechanics

View full text Add to dashboard Cite

In this work the practical applicability of a 2D URANS approach adopting a block structured mesh and Menter's SST k-ω turbulence model in fluid-structure interaction (FSI) problems is studied using as a test case a ratio B/H = 4 rectangular cylinder. The vortex-induced vibration (VIV) and torsional flutter phenomena are analyzed based on the computation of the out-of-phase and in-phase components of the forced frequency component of lift and moment coefficients when the section is forced to periodically oscillate both in heave and pitch degrees of freedom. Also the flutter derivatives are evaluated numerically from the same forced oscillation simulations. A good general agreement has been found with both experimental and numerical data reported in the literature. This highlights the benefits of this relatively simple and straightforward approach. These methods, once their feasibility has been checked, are ready to use in parametric design of bridge deck sections and, at a later stage, in the shape optimization of deck girders considering aeroelastic constraints.

show abstract

Composite Structured Mesh Generation With Automatic Domain Decomposition In Complex Geometries

Cited by 7 publications

References 10 publications

Automatic optimal block decomposition for structured mesh generation using genetic algorithm

Automatic optimal block decomposition for structured mesh generation using genetic algorithm

Method for generating high-quality tetrahedral meshes of geological models by utilizing CGAL

On the applicability of 2D URANS and SSTk-ωturbulence model to the fluid-structure interaction of rectangular cylinders

Contact Info

Product

Resources

About