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按照微元法进行数学建模,以非牛顿流体在歧路管中的全展流动模型和在狭缝流道中的全展流动模型为理论基础,应用所有流径上压力降相等和歧路管内外壁剪切速率相等的设计准则,实现沿模头幅宽方向的流量分布均匀设计目标,并用Pro/E进行参数化建模和几何模型网格划分,最后采用Polyflow有限元软件对理论设计进行数值模拟验证,得到压力分布、速度场和壁面剪切速率。模拟结果表明:压力降符合较好,均匀性在宽幅方向上基本一致,剪切速率与设计准则相符。
According to the mathematical modeling of the micro-element method, taking the non-Newtonian fluid full-flow model in the manifold and the full-flow model in the slit flow channel as the theoretical basis, the pressure drop across all the flow paths is equal and the inner and outer wall shear Cutting rate equal to the design criteria to achieve uniform distribution along the width of the die flow direction design goals and use Pro / E parametric modeling and geometric model meshing, and finally the use of Polyflow finite element software to verify the theoretical design of numerical simulation , Get pressure distribution, velocity field and wall shear rate. The simulation results show that the pressure drop is in good agreement and the uniformity is basically consistent in the width direction, and the shear rate is in accordance with the design criterion.