Numerical Simulation of 3-D Pollution Propagated from a Gaseous Source Through ‎Indoor Space by Applying Pressure Zonal Model

Simulating the distribution of emissions in indoor spaces is usually done using very time-consuming and costly ýcomputational fluid dynamics methods. In this paper, in order to achieve a suitable accuracy and high-speed method for ýsimulating three-dimensional emission propagation in a room due to a gaseous pollution source, a pressure version of the ýzonal method has been developed. To demonstrate the capabilities of this developing method, two problems of the air ýemission within a room have been investigated. At the first problem, for validating the results of this research, the emission ýsimulation through contaminated air into a room with dimension of 3×4×2.5 m via an air-conditioning gate mounted on the ýwall near the ceiling is done and the results have been compared with the experimental data and the results of the numerical ýsolution of Navier-Stocks Equations. According to this comparison, the percentage of average error between the present ýresults and the experimental data is 26.8 and also the percentage of average error between the present results and the results ýof numerical solution is 10. After that, considering both constant and instantaneous gaseous pollution sources in a room with ýdimensions of 3×4×3 m, pollution distributions in the room have been evaluated. According to the results of this research, ýthis zonal method can obtain acceptable results in far less time than those of the experimental and computational fluid ýdynamics methods. Therefore, this method can be efficient for considering time-consuming environmental problems.ý