Two components of a two-dimensional flow in polar coordinates are given as Is this a steady incompressible flow? The velocity vector in a flow field is represented by where are the unit vectors of...

Two components of a two-dimensional flow in polar coordinates are given as

Is this a steady incompressible flow?

The velocity vector in a flow field is represented by

where

are the unit vectors of the spherical coordinate system. Does this represent an incompressible flow field?