Research On Engineering Thermophysics In The Caue Of Haze

In recent years,with the rapid development of national economy and urbanization,the problem of air pollution has become increasingly serious,fog and haze weather occur frequently.Particulate matter is the main pollutant in the atmosphere.The social activities of high-density populations inevitably emit fine particulate matter(PM2.5).When the fine particulate matter emissions exceed the atmospheric carrying capacity,its concentration will continue to accumulate.If there are other influencing factors such as static weather,it is very easy to form a wide range of haze.In this paper,the research on engineering thermophysics in the cause of haze is carried out.Based on theoretical analysis and numerical simulation,the influencing factors of haze particle sedimentation are explored.The theoretical analysis of the sedimentation process of smog particles was carried out.Mathematical models and physical models were established.The corresponding boundary conditions were set.The CFD software was used to simulate the sedimentation process of particulate matter,and the effects of environmental momentum disturbance and environmental temperature difference were analyzed.The similarity theory is designed to simulate the sedimentation of particulate matter,and the numerical simulation results are verified.By analyzing the composition of environmental system entropy,the system dynamic entropy model is established,and the effects of entropy changes on the sedimentation of particulate matter are studied in combination with energy consumption and energy processing conversion efficiency.The research shows that under the environmental disturbance momentum,the kinetic energy is affected by the disturbance of the air,the sedimentation of the particles is affected,the kinetic energy is increased,and the settlement efficiency is reduced.The greater the disturbance momentum,the greater the influence on the sedimentation of the smog particles and the longer the settlement time.When the time reaches a certain level,the influence of the disturbance momentum on the sedimentation of the haze particles gradually disappears.The greater the environmental temperature difference,the greater the impact of the particulate matter in the sedimentation process.This is due to the lifting effect of the floating force generated by the air on the particulate matter under the influence of the temperature difference,so that the particle falling speed is slowed down,and the closer to the high temperature surface,the particulate matter The greater the resistance.The total energy consumption in the system is the most important factoraffecting the entropy production.The more energy consumption,the increase of free energy consumption in the system,the increase of entropy production,the increase of the internal energy of the system,and the forest greening can enhance the internal purification of the system.The ability to form a negative entropy flow,so the wider the forest area is,the stronger the negative entropy flow capacity is.When the energy consumption tends to be stable,the negative entropy flow can be continuously formed through the purification of forest trees to achieve the purpose of reducing the entropy of the system and promoting the system.Ordering,the environment’s ability to absorb particulate matter is enhanced.