Simulated topographic ventilation model based on phoenics analysis in CFD

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As an effective process of passive energy saving, natural ventilation can not only use renewable energy to reduce non-renewable energy, but also improve indoor air quality, providing people with a healthier and more comfortable environment. With the gradual creation of sustainable development space, people pay more and more attention to energy saving, and natural ventilation is also regarded as a system and environmentally friendly ventilation technology. Natural ventilation is an important technical dimension in the construction of greenhouse today. The dual driving force of air pressure and thermal pressure can promote the generation of natural air, thus achieving global cooling, improve thermal comfort, and improve indoor air quality by blowing fresh air. The air pressure and the hot air pressure are always constant and unbalanced. Based on the scientific basis of near air pressure, the effect of the simulated ventilation model is analyzed using CFD phoenics software. Based on CFD numerical simulation technology, the typical structure is simulated on phoenics software platform, and some rules are obtained through analysis. The numerical model uses k-turbulence model, adopts the finite volume method for discrete, second order windward dispersion format, and the algorithm adopts SIMPLE algorithm coupled with speed and pressure. Finally, the outdoor building layout and the exterior window parameters of the typical rooms are obtained, so that the community building can meet the requirements of green ventilation. The experiment has proved that under the simulated terrain of this paper, the average number of indoor air ventilation can reach about 5 times, the air air age is small, and the air quality is improved.