Development of Code for 2-D Distribution Temperature Transient Analysis of Asymmetric Element Linier Using Finite Element Method

摘要

Transient of temperature distribution is found in many physical and engineering events that affect the state of the end of a process. Transient state in the form of geometry and complex boundary conditions is generally difficult to be solved analytically and can only be solved by a computer code. This study is aimed to develop a software code using the finite element method for the analysis of temperature transient distribution with the form of field element discretization asymmetric linier. The completion of the temperature distribution in the transient state is essential following the same procedure on the conditions of temperature distribution at steady state. The main difference is the load at which the load transient analysis is a function of time. Resolution process using finite element method (FEM) involves three stages, namely:the provision of data (preprocessor), problem solving (processor/ solver), interpretation of the results in the form of graphs and contour (postprocessor). Stages of the software development process start from the preprocessor program as making patterns/geometric shapes to be analyzed, discretized field with shape of element asymmetric, writing the number of nodes and elements, loads, initial conditions and boundary conditions. The process of the program code includes completing the matrix stiffness coefficient (K), and matrix load (a) time-based, or called the discretization time. The completion of time discretization uses the Galerkin Method. The stiffness of coefficient consists of stiffness geometry, capacitance matrices, or matrix moisture and the burden imposed as transient loads, such as heat flux load boundary, centralized heat load of boundary, and the initial temperature. In this way the expected completion of temperature transient distribution can be done more easily, quickly, and inexpensively. The code is written using Visual Basic.