Thermodynamic Characteristics Of Single Phase Dielectric System Under Electrostatic Field

The thermodynamic characteristics of dielectric system under the action of electrostatic field is an important part of thermodynamic research and the basis of industrial application.The research object of thermodynamics is the macroscopic material system composed of a large number of microscopic particles,which reveals the law that energy follows when it is transformed from one form to another.The concept of electric field is an important development achievement of modern physics,In recent years,the method of using external field to strengthen industrial production to improve production efficiency has become a hot research topic.Electrostatic field is different from gravitational field,and it is widely used in industrial production and manufacturing because of its controllability and easy operation.Dielectric includes a wide range of substances such as gaseous,liquid and solid.Dielectric that comes into contact with in daily life includes insulating materials such as glass,resin and polymer.Studying the thermodynamic characteristics of dielectric system under the action of electric field can make up for the deficiency of traditional dielectric research.In this paper,the gas-liquid equilibrium mechanism of dielectric system under the action of electric field is deeply explored by using the effect of electrostatic field on dielectric,which provides a theoretical basis for the research of dielectric under the action of electric field.Based on the law of thermodynamics,a system with uniform distribution of internal and external substances is established,and a theoretical model of electric field composed of parallel electrode plates is added to the system.A series of state equations and specific parameter changes under the action of electric field are deduced.By drawing the obtained results,the changes of physical properties of dielectric under uniform electric field and action,such as pressure,mole fraction,etc.,are obtained,thus the potential application of electric field to dielectric is obtained.After studying the theoretical model of uniform electric field composition,this paper begins to discuss the non-uniform electric field.To simplify the problem,the electric field generated by two metal cylindrical surfaces and two flat plates placed in a sector is discussed.Although the electric field generated in this way is not uniform,the relationship between the field strength and the studied points can be calculated by its symmetry,and the spatial distribution formula of components can be obtained.One-component gas,one-component liquid,two-component gas and two-component liquid are added to the established capacitor system model formed by parallel electrode plates.When the system reaches thermodynamic equilibrium,the difference between the physical properties of the dielectric inside the capacitor and those of other dielectrics outside the capacitor system is the effect of electrostatic field.By drawing the theoretical results,it is found that the internal pressure of single-component gas and single-component liquid increases with the increase of system temperature under the action of uniform electric field,and the molar fraction of substances with large molar mass in the mixture will increase under the action of uniform electric field.Under the action of non-uniform electric field,the pressure of single-component gas and liquid changes with the position of electric field.The greater the electric field strength,the greater the regional pressure.In non-uniform electric field,the molar fraction of gas and liquid mixture will change with the position of electric field,and the molar fraction of substances with large molar mass will increase under the action of electric field.By discussing the obtained results,the potential application value of uniform electric field and non-uniform electric field to dielectric system can be obtained,for example,the engineering application of electric field can be added to industrial production and aerospace industry for phase change and liquid level rise.Under the action of uniform electric field,the molar fraction of mixed gas and liquid will change,which can be used for gas enrichment and composition control of mixed gas.The molar fraction of mixed gas and liquid will also change under the action of non-uniform electric field,and the molar fraction of substances will directly affect the properties of the mixture,which can be used to control the physical properties of the mixture by electric field.