三维柱坐标系下流场计算差分方程的建立

The establishment of difference equations for the calculation of fluid field in three-dimensional cylindrical coordinates

针对三维柱坐标系下流场计算的问题,对所涉及的各物理量详细给出了具体的差分过程,特别是关于网格划分过程中出现的弧度变成弧长时的半径问题,进行了详细的讨论.在速度场3个方向动量方程的差分过程中,考虑到采用交错网格,对于各方程对应的网格处理,分别进行了对应的介绍.最后给出所有方程所对应的差分方程的推导过程.

Aiming at the problems of fluid field calculation, the specific processes of difference were given in detail for the various phys- ical quantities concerned in the calculation. The radius problem appeared during the change of radian into arch length in the process of mesh generation was especially discussed in great length. The mesh processing of every equation was introduced in the difference process of the three momentum equations on three directions in the velocity field based on the staggered mesh system, and then the der- ivation processes were presented for the difference equations corresponding to all equations.