what's the flow pattern in a vertical cylindrical tank mounted with
concentric shafts in pits with several impellers gapped, rotated clockwisely
or counterclockwisely, for some liquids with definite shear rates?
不知道版上的人怎么解读这段话?

对于有definite shear rate 的液体，在一圆柱形的槽中，该槽有同心轴固定在pits(?)中，轴上有若干相间隔之叶片，当叶片顺时针或逆时针旋转时，该液体之flow pattern为何？*垂直的圆柱形槽