Instantaneous Three-Dimensional Vortex Structure and Heat Transfer of Turbulent Flow in Expanding Concentric Annular Flow-Passage with Rotating Inner-Wall

五个流动通道的凹，凸，锥形，圆柱形，和磁盘类型的湍流行为进行了检查。在这些通道中，多种流动不稳定因素可以同时影响流动。进行了大涡模拟（LES）、直接数值模拟（DNS）和粒子跟踪测速（PTV）测量。通流雷诺数，泰勒数和几何形状的流动通道上的瞬时三维涡结构，湍流统计，和传热系数的影响进行了澄清。

Five flow passages of concave, convex, conical, cylindrical, and disk types were examined for their turbulence behavior. In these passages, multiple flow-instability factors can simultaneously affect the flow. Large Eddy Simulation (LES), Direct Numerical Simulation (DNS), and Particle Tracking Velocimetry (PTV) measurement were performed. The effects of through-flow Reynolds number, Taylor number, and geometry of flow passages on instantaneous three-dimensional vortex structure, turbulence statistics, and heat transfer coefficients were clarified.