盲肠河段口门紊动掺混区水流运动的相似分析

Similarity analysis for water movement of turbulent mixing region at the mouth of cecum reach

本文应用湍流模式，建立了盲肠口门紊动掺混区水流运动的数学模型，在定常流动中，近似具有自相似性．利用相似理论，给出了流函数和流速的相似函数，对掺混区的水流运动进行了模拟计算，并分析了掺混区横向流速梯度及涡粘性系数的变化特性．

In this paper, a mathematical model for flow of turbulent mixing region at the mouth of cecum reach is established based on turbulence model. In the conditions of steady flow, it is proved that the flow has similarity structure at turbulent mixing region. From the theory of similarity, the similarity functions of flow function and velocity are obtained. The flow of turbulent mixing region is numerically simulated and the velocity gradient, virtual kinematic viscosity are analysed.