[求助]怎样理解ANSYS中的Rotating Frames of Reference

weicong0207

在ANSYS帮助文档Fluids Analysis Guide中的10.2节讲述关于旋转的情况
我没有看明白。
有没有高手对这个比较清楚，能够详细的讲解一下关于流体怎样加旋转，以及应该注意哪些东西。
谢谢！
You can choose to solve your problem in a rotating reference frame. In this case, the velocities are calculated and specified with respect to a coordinate system which is rotating at constant angular velocity. Such an approach is useful for pump blade passage analysis. Figure 10.2: "Rotating Flow Problem" shows a schematic of a rotating problem which requires moving coordinate systems. Figure 10.3: "roblem Schematic with Rotating Coordinate" shows the problem schematic in the rotating coordinate system.
The pressures specified by boundary conditions are in terms of the static pressure observable by the stationary analyst, not in terms of the rotating coordinate system. The transformations necessary to solve the equations in the rotating coordinate frame are done internally.
You can set rotational speeds using any of the following: Command(s):  CGOMGA  
GUI:  Main Menu> Preprocessor> FLOTRAN Set Up> Flow Environment> Rotating Coords
Main Menu> Solution> FLOTRAN Set Up> Flow Environment> Rotating Coords  

For all but 3-D Cartesian coordinate systems, you must specify the axis of rotation as being about the Z axis. For 2-D axisymmetric systems, the ANSYS program automatically interprets the specified Z-axis rotation as actually acting about the correct axis of symmetry (that is, about either the X or Y axis). For 3-D Cartesian geometries, the rotational axis need not be in the same direction as one of the principal axes of the global coordinate system, and may be offset from the origin of the global coordinate system.
To specify offsets for the axis of rotation, use one of the following: Command(s):  CGLOC  
GUI:  Main Menu> Preprocessor> FLOTRAN Set Up> Flow Environment> Rotating Coords
Main Menu> Solution> FLOTRAN Set Up> Flow Environment> Rotating Coords  

weicong0207

没有人研究过这个东西吗？
自己顶一下