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preprocessing methodology to reducing calculation errors in 3 dimensional model for development of heat transfer analysis program for 3 dimensional structure of building
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  • Journal title : KIEAE Journal
  • Volume 16, Issue 1,  2016, pp.89-94
  • Publisher : Korea Institute of Ecological Architecture and Environment
  • DOI : 10.12813/kieae.2016.16.1.089
 Title & Authors
preprocessing methodology to reducing calculation errors in 3 dimensional model for development of heat transfer analysis program for 3 dimensional structure of building
Lee, Kyusung; Lee, Juhee; Lee, Yongjun;
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 Abstract
This study is part of three-dimensional(3D) heat transfer analysis program developmental process. The program is being developed without it`s own built in 3D-modeller. So 3D-model must be created from another 3D-modeller such as generic CAD programs and imported to the developed program. After that, according to the 3D-geometric data form imported model, 3D-mesh created for numerical calculation. But the 3D-model created from another 3D-modeller is likely to have errors in it`s geometric data such as mismatch of position between vertexes or surfaces. these errors make it difficult to create 3D-mesh for calculation. These errors are must be detected and cured in the pre-process before creating 3D-mesh. So, in this study four kinds of filters and functions are developed and tested. Firstly, `vertex error filter` is developed for detecting and curing for position data errors between vertexes. Secondly, `normal vector error filter` is developed for errors of surface`s normal vector in 3D-model. Thirdly, `intersection filter` is developed for extracting and creating intersection surface between adjacent objects. fourthly, `polygon-line filter` is developed for indicating outlines of object in 3D-model. the developed filters and functions were tested on several shapes of 3D-models. and confirmed applicability. these developed filters and functions will be applied to the developed program and tested and modified continuously for less errors and more accuracy.
 Keywords
Numerical methods;Heat transfer;Unstructured grid, matrix solver;Cell-centered scheme;
 Language
Korean
 Cited by
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