What will be the dimension of the flow consistency index for a fluid with a flow behaviour index of -1?

Correct Answer: N/m2 s
The relation between shear stress Z and velocity gradient of a fluid is given by where A is the flow consistency index and n is the flow behaviour index. If n = -1, A = Z * Unit of Z is N/m2 and is s-1. Thus, the unit of A will be N/m2 s.