جستجوی مقالات مرتبط با کلیدواژه « Concentration distribution » در نشریات گروه « فیزیک »

This study aims to investigate changes in radon concentrations in residuals areas, using a sample closed room with the surface area of 12 m2. In the room, radon gas emitted from the floor and walls surfaces with different emission rates, and gaps under the door and around the window were the natural ventilation routes. Radon concentrations were measured in different points of the room in different circumstances and times using an accurate radon detector and then compared with the simulation results from Computational Fluid Dynamics (CFD) technique under corresponding conditions and times. The analytical data were used to validate the results of these two techniques. The results indicate that the radon concentration decreases from a relatively uniform distribution of about 81 Bq/m3 to a relative non-uniform distribution in the range from 12 Bq/m3 to 44 Bq/m3 after a very slow natural ventilation. The simulation results demonstrate an appropriate agreement with the experimental data that indicate the accuracy of performed modeling.