이질재료 복합벽체 접합부의 다차원 전열해석 방법에 관한 연구 ( A Study on the Method of Multi-dimensional Heat Transfer Analysis of Composite Wall Joint )

In this study, the features of FEM(Finite Element Method) and FDM(Finite Differential Method) which can analyze multi -dimensional heat transfer process was evaluated by analyzing one of the thermal bridges in building(the composite wall joint). And two grid systems with FDM(central face method and central node method) were also evaluated by analyzing the same part of a thermal bridge. According to the results, there is a little difference between FEM and FDM. With FEM, it is easy to model the complicated geometrical shapes, but difficult to make the equations simple, so the caculation time is increased. With FDM, it is easy to understand the physical meaning and to arrange the nodes. In FDM, the grid system with central node method can easily handle the nodes at surface, edge and joint of different materials, so it can make the programming more convenient than the grid system with central face method.