Analysis method based on power balance as applied to wind driven flow

Currently, various studies have demonstrated some doubt about the accuracy of the orifice equation when applied to the calculation of cross-ventilation. As a result, a computational fluid dynamic (CFD) simulation is considered the best method of analyzing cross-ventilation properties under present conditions. However, repetition of CFD analysis to determine the optimum ventilation performance is particularly complex. Accordingly, a flow network model that corresponds to cross-ventilation was developed and suggested as a more efficient means of determining the optimal opening conditions. At least one instance of CFD analysis using a model with openings is necessary to investigate the airflow property around a building. The suggested flow network model was established by utilizing the results of the CFD analysis, and relaxing the total pressure loss coefficients.