These factors resulted in partial obstruction of nephron by increasing resistance to the outflow of tubular fluid with elevation of intracystic pressure, leading to dilatation of nephron and finally cyst formation. 这些梗阻因素使管内尿流阻力增大,压力升高,管腔局部扩张,最终囊肿形成。
Tubular fixed-bed reactor is widely used in the petrochemical industry, the performance of tubular fixed-bed reactor is closely related with the heat transfer mode, fluid flow of reaction medium and the distribution of heat in the reactor. 列管式固定床反应器在石油化工工业中应用广泛,反应器的操作性能与其传热方式、反应介质流体流动以及其内部温度分布密切相关。
It is suggested that more attention should be paid to the research on non-Newtonian fluid tubular flow models. Laboratory experiment is the direct method of studying the non-Newtonian fluid tubular jet flow behavior. 建议应加强适用于非牛顿流体湍流模型的研究,实验的方法是研究非牛顿流体湍流射流的最直接方法。
Seesaw effect leads to the false dynamic trend for tubular exchanger real-time model. Compared with the character of real exchanger device, the dynamic curve of fluid outlet temperature is reverse when the inlet temperature of fluid changes in step. 跷跷板效应使管式换热器动态数学模型的流体出口温度动态扰动曲线出现错误,与实际设备的变化趋势相反。