Simulation Of Flow Field And Electromagnetic Field In Higee Microwave Coupling Field

As a kind of process strengthening equipment,the hypergravity reactor plays an important role in chemical separation,nanomaterial preparation,environmental protection.However,at present,hypergravity equipment adopts the jacket heating method.This traditional heating method not only has a slow heating speed,cannot meet the development requirements of energy saving and emission reduction,but also affects the smooth progress of the reaction.Therefore,it is necessary to upgrade the heating method of the high gravity equipment.In view of the advantages of microwave heating,such as fast heating speed and low environmental pollution,this paper proposes to carry out the simulation research on the flow field and electromagnetic field of the hypergravity microwave coupling field,so as to optimize the structural parameters of the hypergravity microwave coupling reactor and realize the enhancement of the coupling effect.The main research contents and conclusions are as follows:(1)Simulation study of flow field in hypergravity microwave coupling field.The fluid flow pattern in the hypergravity microwave coupling field was simulated by Fluent software,the effect of the number of grids on the fluid flow pattern was investigated,the grid independence test was carried out,the grid division basis was determined,and the better fluid flow pattern was obtained.(2)Simulation study of electromagnetic field in hypergravity microwave coupling field.On the basis of obtaining the best fluid flow pattern,the average thickness of the liquid film on the rotating disk was obtained by calculation,and then the loss density in the hypergravity microwave coupling field was simulated by HFSS,and the effect of the relevant parameters of the single microwave source and the double microwave source on the loss density was investigated respectively,and the structural parameters with better effects were obtained: in the case of single microwave source,the input length of microwave is 40 mm,the power is 1500 w,the position is 120 mm,and the installation mode is horizontal installation,at this time,the loss density is the largest,and the medium absorbs more energy;in the case of dual microwave sources,the relative positions of microwave are perpendicular to each other,the power distribution ratio is 1:5,and the height difference between microwave sources is 60 mm,at this time,the loss density is the largest,the medium absorbs more energy,and the effect is good.(3)Experimental study of temperature field in hypergravity microwave coupling field.It is found that in the process of microwave heating,the more energy the medium absorbs,the greater the power loss density and the higher the temperature rise of the medium.On the basis of the simulation study,the effect of the parameters of single microwave source on the temperature rise of the fluid was investigated,and the experiment and simulation were compared.The results showed that when the power of microwave source was 1500 w,the location was 120 mm,and the installation method was horizontal installation,the temperature rise of the fluid was the highest,which was 14.5 °C,indicating that the two had a high coincidence degree.