Utilizing simulation to predict natural ventilation and wind flow

To predict ventilation and related air flow parameters, a lot of calculation techniques could be utilized; however the main difficulties concern ease of use and the providingof input data. Today, many advances are taking place, especially in the areas of user friendly access and embedded databases. To find reliable result in designingprocess and evaluate the performance of ventilation simulating methods are increasingly needed in every step of designing. They are especially important for making preliminary evaluations of complex ventilation and air flow strategies. (Liddament, 1996)In both methods which have been reviewed in this paper,not only their needed data are easy to find and use, but also the results are applicable in a general and wide fields of design. The first one is a graphic base method which could be helpful in predicting wind speed and quality by using a minimum data required. The second one is based on raster image analyzing which will be more and more developed in future as remote sensing technology accelerates developments.The outputs are useful in basic steps of design and in a scale between urban scale and a single building scale but not applicable in an especial building unless the utilizeddata and method become more accurate and developed.Therefore these approaches introduced as useful methods in very early stage of design.Conference them: simulation of natural ventilation