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?
不知道版上的人怎麼解讀這段話?

對於有definite shear rate 的液體，在一圓柱形的槽中，該槽有同心軸固定在pits(?)中，軸上有若干相間隔之葉片，當葉片順時針或逆時針旋轉時，該液體之flow pattern為何？*垂直的圓柱形槽