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Anisotropic mesh adaptation : recovering quasi-structured meshes

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dc.contributor.author Sharbatdar, Mahkame
dc.date.accessioned 2012-11-07T17:48:03Z
dc.date.available 2012-11-07T17:48:03Z
dc.date.copyright 2012 en_US
dc.date.issued 2012-11-07
dc.identifier.uri http://hdl.handle.net/2429/43568
dc.description.abstract An adaptive method for producing anisotropic quasi-structured meshes is presented in this thesis. Current anisotropic adaptation schemes produce meshes without any regular structure which can hurt accuracy and efficiency of the solution. By modifying the anisotropic adaptation schemes, producing aligned, quasi-structured meshes is possible which means that the accuracy and efficiency of the flow solution are improved. By using quasi-structured meshes, we can get the advantages of flexibility of unstructured meshes for complex geometries and accuracy of the high directional qualities of the structured meshes at the same time. The construction of the quasi-structured meshes from initial isotropic unstructured meshes is accomplished by assigning metrics to vertices based on the error estimation methods. The metrics are used to communicate the desired anisotropy to the meshing program. After assigning a metric to each vertex, the mesh is refined anisotropically using four mesh quality improvements operations to produce high quality anisotropic quasi-structured meshes: swapping to choose the diagonal of the quadrilateral formed by two neighboring triangles which results the maximum quality, inserting vertices for large triangles, vertex removal to eliminate small edges and vertex movements to optimize the location of the vertices so that quasi-structured meshes are created. The idea in the optimization process is to smooth a vertex location by seeking so that the final mesh contains target elements dictated by the metrics assigned in the three vertices of that triangle. The final, high quality mesh is produced by using these operations iteratively based on the metrics assigned to each vertex in an adaptive, solution-based process. en_US
dc.language.iso eng en_US
dc.publisher University of British Columbia en
dc.title Anisotropic mesh adaptation : recovering quasi-structured meshes en_US
dc.type Electronic Thesis or Dissertation en
dc.degree.name Master of Applied Science - MASc en_US
dc.degree.discipline Mechanical Engineering en_US
dc.degree.grantor University of British Columbia en
dc.date.graduation 2013-05 en_US
dc.degree.campus UBCV en_US
dc.description.scholarlevel Graduate en


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