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ARS Home » Southeast Area » Oxford, Mississippi » National Sedimentation Laboratory » Watershed Physical Processes Research » Research » Publications at this Location » Publication #350117

Research Project: Computational Tools and a Decision Support System for Management of Sediment and Water Quality in Agricultural Watersheds

Location: Watershed Physical Processes Research

Title: 2D automatic body-fitted structured mesh generation using advancing extraction method

Author
item Zhang, Yaoxin - University Of Mississippi
item Jia, Yafei - University Of Mississippi

Submitted to: Journal of Computational Physics 2
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 10/14/2017
Publication Date: 10/18/2017
Citation: Zhang, Y., Jia, Y., Bingner, R.L. 2017. 2D automatic body-fitted structured mesh generation using advancing extraction method. Journal of Computational Physics 2. 353:316-335.

Interpretive Summary: A Computational Fluids Dynamics (CFD) analysis is used to solve a set of highly non-linear partial differential equations using various methods that are often labor-intensive for complex shaped physical domains. A new method has been developed that is composed of an automatic structured mesh generation approach for complex geometries for channel branches or tributaries and dikes. With this method, the hierarchical levels of sub-domains can be identified, and the block boundary of each sub-domain in convex polygon shape in each level can be extracted in an advancing scheme. In this paper, several examples were used to illustrate the effectiveness and applicability of the proposed algorithm for automatic structured mesh generation, and the implementation of the method.

Technical Abstract: This paper presents an automatic mesh generation algorithm for body-fitted structured meshes in Computational Fluids Dynamics (CFD) analysis using the Advancing Extraction Method (AEM). The method is applicable to two-dimensional domains with complex geometries, which have the hierarchical tree-like topography with extrusion-like structures (i.e., branches or tributaries) and intrusion-like structures (i.e., peninsula or dikes). With the AEM, the hierarchical levels of sub-domains can be identified, and the block boundary of each sub-domain in convex polygon shape in each level can be extracted in an advancing scheme. In this paper, several examples were used to illustrate the effectiveness and applicability of the proposed algorithm for automatic structured mesh generation, and the implementation of the method.