同心环空 meaning in English

concentric a ulus
concentric annulus

In order to study the stability of non - newtonian fluid and its flow pattern discrimination method , the integral stability theory and local stability theory are applied to the concentric annulus flowing of plastic fluid and power - law fluid , then a relevant stability parameter expression of discriminating flow pattern is derived and set up in the paper
摘要针对非牛顿流体的稳定性问题及其流态判别的研究，将整体稳定性理论及局部稳定性理论应用于塑性流体和幂律流体在同心环空的流动中，建立和推导出相对应的判别流动状态的稳定性参数表达式。