适应性网格技术在异向双螺杆挤出机中的仿真

Simulation in counter-rotating twin screw extruder by adaptive grid technology

将现有的适应性网络技术应用到异向双螺杆挤出机中,利用AutoCAD软件绘制异向螺纹元件的端面型线,并在Solidworks软件上建立相应的三维模型,将几何模型导入Gambit软件进行网格划分,在Polyflow软件中采用适用性网格技术,根据Maxdiv值对流体流道的网格进行局部加密,设计异向双螺杆等温瞬态流动问题的有限元求解任务,研究Maxdiv值对流道的剪切速率场、黏度场和压力场等方面的影响情况,还对比适应性网格技术中网格细化次数对计算资源的影响,并说明该方法在双螺杆挤出过程仿真过程中的应用潜力。

Applied the existing adaptive grid technology to the counter-rotating twin-screw extruder,useed Autocad software to draw the end profile of the counter-rotating thread element,and establisheed the corresponding 3 D model on the Solidworks software.Then imported the geometric model Gambit software for mesh generation.Selecting the adaptable mesh technology of Polyflow software,the mesh of the fluid channel is locally densified according to the Maxdiv value.The finite element solution task of isothermal transient flow problem of counter-rotating twin-screw was designed,and the Maxdiv value was also studied.The effects of the value were studied,on the shear rate field,viscosity field,and pressure field of the flow channel.And compared the effects of the number of mesh refinements in the adaptive grid technology on the computing resources.It is showed that Application potential of the method in the twin-screw extrusion process during the simulation.