격자 세분화 방법을 고려한 복사열전달 형상계수 계산 기법 연구STUDY ON VIEW FACTOR CALCULATION FOR RADIATIVE HEAT TRANSFER BY USING THE MESH SUBDIVISION METHOD
- Authors
- 김동건; 김태국; 최준혁; 이장준; 한국일
- Issue Date
- 2014
- Publisher
- 한국전산유체공학회
- Keywords
- 복사형상계수; 입체각; 격자 세분화; Radiation View Factor; Solid Angle; Mesh Subdivision
- Citation
- 한국전산유체공학회지, v.19, no.1, pp 1 - 6
- Pages
- 6
- Journal Title
- 한국전산유체공학회지
- Volume
- 19
- Number
- 1
- Start Page
- 1
- End Page
- 6
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/13612
- DOI
- 10.6112/kscfe.2014.19.1.001
- ISSN
- 1598-6071
- Abstract
- Since experiments on the actual operational status are said to be very impractical because of their economic and repeatability problems, it is difficult to understand the thermal profiles of aerospace or military equipments. Thus, the CFD codes with considering the radiation heat transfer are used to compensate the defect. In case, analyzing the radiation exchanges between the object surfaces are very important. Because the temperature and the IR signal distributions of the object surface are significantly affected by the radiative heat transfer. To achieve accurate thermal radiation exchange between surfaces, it is important to calculate the radiation view factor precisely. Finer subdivision of meshes can be used to increase the accuracy of radiation view factor, but if the mesh is subdivided infinitely, the time required for calculation increases significantly and thus decreasing the efficiency. If the subdivision is not sufficient, assurance of accuracy is not guaranteed. In this paper, optimal mesh subdivision method using the solid angle has been successfully tested and found to be useful in increasing the efficiency of calculating the shape factors.
Since experiments on the actual operational status are said to be very impractical because of their economic and repeatability problems, it is difficult to understand the thermal profiles of aerospace or military equipments. Thus, the CFD codes with considering the radiation heat transfer are used to compensate the defect. In case, analyzing the radiation exchanges between the object surfaces are very important. Because the temperature and the IR signal distributions of the object surface are significantly affected by the radiative heat transfer. To achieve accurate thermal radiation exchange between surfaces, it is important to calculate the radiation view factor precisely. Finer subdivision of meshes can be used to increase the accuracy of radiation view factor, but if the mesh is subdivided infinitely, the time required for calculation increases significantly and thus decreasing the efficiency. If the subdivision is not sufficient, assurance of accuracy is not guaranteed. In this paper, optimal mesh subdivision method using the solid angle has been successfully tested and found to be useful in increasing the efficiency of calculating the shape factors.
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