Shape optimization of polymer extrusion die using three-dimensional flow simulation and non-Newtonian fluid models

3차원 흐름 모사와 비뉴톤 유체모델을 이용한 고분자 압출 다이의 형상 최적화

Three-dimensional optimum design of coat-hanger die is performed using power-law and Carreau models. It is found that the three-dimensional optimum design algorithm shows good convergence with the non-Newtonian fludis. the nore realistic optimum design is accomplished by employing Carreau model with the three-dimensional design method. The effect of vixcosity modles is investigated by comparing the optimum manifold profiles and flow rate distributions of power-law and Carreau modles. Through the accurated viscosity representation of Carreau model, the effect of total flow rate on the optimum manifold profile is investigated.