CAJ | 학술논문

研究了恒定剪切速率下的不可压缩非牛顿流体在突扩管中的流动行为,通过给定突扩管的前后管的直径比来观察流动现象,突扩管流动中的分歧流动是一个普遍现象,早先课题组已经用水作为试验来验证模型的正确性,通过使用Herschel-Bulkley模犁对于非牛顿流体进行模拟,模拟结果使用流线、分歧图表、回流区、压力分布和流速分布来分析.
연구료항정전절속솔하적불가압축비우돈류체재돌확관중적류동행위,통과급정돌확관적전후관적직경비래관찰류동현상,돌확관류동중적분기류동시일개보편현상,조선과제조이경용수작위시험래험증모형적정학성,통과사용Herschel-Bulkley모리대우비우돈류체진행모의,모의결과사용류선、분기도표、회류구、압력분포화류속분포래분석.
The incompressible flow with constant shear viscosity through a symmetric expansion is studied numerically. The geometry model is given as a ratio of diameter of tube,especially upstream and downstream. The bifurcation-breakup is a common phenomenon in expansion simulation. Newtonian fluid,water,is used for validity. For non-Newtonian case the transition process is analyzed,using Herschel-Bulkley model. Detailed simulations are carried out in form of streamline plots,bifurcation diagrams,vortex length,pressure distribution and velocity profiles.