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Generation of non‐isotropic unstructured grids via directional enrichment
Author(s) -
Löhner Rainald,
Cebral Juan
Publication year - 2000
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/1097-0207(20000910/20)49:1/2<219::aid-nme930>3.0.co;2-3
Subject(s) - mesh generation , delaunay triangulation , isotropy , grid , euler's formula , point (geometry) , reynolds averaged navier–stokes equations , finite element method , topology (electrical circuits) , volume mesh , geometry , polygon mesh , unstructured grid , computer science , mathematics , mathematical analysis , structural engineering , mechanics , computational fluid dynamics , engineering , physics , combinatorics , quantum mechanics
A procedure for the generation of highly stretched grids suitable for Reynolds‐averaged Navier–Stokes (RANS) calculations is presented. In a first stage, an isotropic (Euler) mesh is generated. In a second stage, this grid is successively enriched with points in order to achieve highly stretched elements. The element reconnection is carried out using a constrained Delaunay approach. Points are introduced from the regions of lowest stretching towards the regions of highest stretching. The procedure has the advantages of not requiring any type of surface recovery, not requiring extra passes or work to mesh concave ridges/corners, and guarantees a final mesh, an essential requirement for industrial environments. Given that point placement and element quality are highly dependent for the Delaunay procedure, special procedures were developed in order to obtain optimal point placement. Copyright © 2000 John Wiley & Sons, Ltd.