Abstract
To promote so-called eco-design, a simulation system was developed primarily focusing on to estimate outdoor thermal environment as visual schemes. Holistic frame of the presented system consists of two parts. One is the heat balance analysis at various surfaces of ground or buildings, and the 3-dimentional fluid analysis is another. Those two phases for analysis are connected effectively and unilaterally, the former to the latter. This system was originally aimed at the practical use by designers and engineers to assist their works. That's why this system is fully conscious of Graphical User Interface, GUI. One of the specific features is that the system includes quite a few hydrothermal properties such as various natural coverings, artificial soil surface, and green-covered roof, which were obtained by a series of experiments and observations of authors.
