Diffusion Concentration Field Simulation Of Indoor Pollutants Based On Coupling Multiple Factors

Now people spend more and more time in indoor rooms. With the social development and improvement of people's living standards, people have paid more attention to the indoor environment, so researches on indoor air environment are particularly important. Meanwhile, the recent years, a large number of chemical raw materials are used in the building decoration and the furniture industry. These chemical raw materials will cause various harmful pollutants such as benzene, formaldehyde and the radioactive gas. Benzene is harmful for people's health. Its interior amount exceeds much after renovation, and it will stay at rooms for a long time, so domestic and foreign researchers have paid highly attention to it.At first, the principles and methods of CFD calculation is described from the perspective of mathematical theory .And on this basis, the feasibility of putting CFD calculation technology into indoor contamination simulation is identified in this paper. Dissemination of benzene that is distributed by chemical materials used in building decoration in a small room which was decorated not long ago is simulated and separate dissemination situation under wind pressure, hot pressure, both wind pressure and hot pressure is simulated by CFD too. Meanwhile, the release hot character of indoor benzene as well as the movement rule of indoor air is also simulated. Purpose of this paper is to guide the final interior design, reduce the harm for human health coming form benzene released form of chemical material during decorating. Concrete contents are as follows:1.Construct the residential three-dimensional simulation model and simulate the indoor air movement and distribution when the room is under wind pressure, hot pressure, both wind pressure and hot pressure respectively;2.According to the specific circumstances of this residential, the main source of benzene is selected as the substances which are in high concentration of benzene. The whole residential which is constructed according to the actual situation is seen as the research object;3.Simulate distribution and diffusion of benzene each room in this residential and get the details of benzene of this residential; 4.According to the simulation results, the impact of dissemination of benzene concentration under wind pressure, hot pressure, both wind pressure and hot pressure is compared and studied respectively.5.Detect the benzene concentration of this residential after it has been decorated for more than one month, get benzene parameters and to prove its feasibility;6.Compare the simulation results with the detected values and analyze them, and conclude rules of benzene distribution and dissemination to guide the indoor design;The reliability of putting CFD technology into study distribution and dissemination of indoor pollutants is proved in this paper by theoretical research, simulation and actual testing. Meanwhile, much theoretical knowledge of practical applications value is gotten through processing and analysis of calculation results which will be an important reference for present and future research on CFD and indoor engineering.