Mathematical Model Of Bubble Formation And Dissolution Process In Polymer

Foam plastic is a kind of composite plastics,is produced by foaming method. According to different principles of gas process,it can be divided into physical foaming and chemical foaming. Particularly the physical foaming use of inert gas as CO2 N 2 meet environmental protection requirements,is payed more attention. In the physical foaming , the most crucial part is formation of homogeneous phase. So the study of homogeneous phase have a very important significance.The energy in the flow field reflects the dynamic conditions on the bubble nucleation contribution in terms of energy for bubble nucleation. Previous studies are under constant temperature. Do not conside the effect of the melt temperature. Use of the relationship between temperature and viscosity and shear energy formula .A new formula of shear energy and temperature is got.On the basis of experiments, building a mathematical model reflect the dissolution process of bubbles in the polymer is necessary.In this paper, A mathematical model of the process of bubble dissolution is built .In this model , the DeWitt constitutive equationreflect is used, it can reflect the performance of non-Newtonian fluid and calculation is relatively simple.The mathematical model is too complex.Obtain its analytical solution is impossible.This paper only calculate the numerical solution.In order to simplify the calculation process, euler method were used.Use of Matlab, solving the mathematical model. The mathematical model reflects the dissolution process of bubbles. With the help of visual technology,the diffusion process of gas bubbles were observed. The difference between theoretical prediction and experimental results is small.In this paper a input interface of Matlab is designed, When the input of different parameters in the interface ,the computer will draw the curve of dissolution.At the same time output time of the process of dissolution.This moldel accurately meet the process of dissolution .Results of this study have some theoretical innovation, and has an important guiding significance in the industrialization of the porous plastic.