Heat Transfer Analysis in irregular Domain

• Main Authors: Hung-Cheng Lee, 李宏哲
• Other Authors: Han-Chern Ling;Chuei-Tin Chang
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/67856955501041624006

碩士 === 國立成功大學 === 化學工程研究所 === 82 === The understanding of solidifying and melting phenomena is of great importance in modeling numerous industrial processes for design and/or control purposes.This is often a difficult task since,in addition to heat conduction, the transport of a large amount of latent heat occurs at the phase boundary and the time- variant position of the melting front cannot be determined a priori. Thus, the development of an efficient numerical algorithm with stationary grid points for simulating such phenomena has been the focus of many studies in recent years. In addition, we are interested in studying the solidification process in a container with arbitrary shape. Therefore, other than the problem of describing heat transfer during phase change, one also has to face the numerical problems caused by irregular system domain. In this research, we use the temperature model as the base governing equation for assessing the performance of various different approaches published in the literature, e.g.\ equivalent heat capacity method, nominal heat capacity method and apparent heat capacity method. As for the numerical techniques for handling irregular domain, we have decided to use the adaptive grid eneration method after careful evaluation of several popular algorithms.Finally, we have integrated the above methods to solve the heat transfer model of steel-casting process in an H-shaped beam blank. And from the numerical results we have obtained so far, it can be observed that the adaptive grid generation method do work for irregular domain.