A two-dimensional incompressible frictionless flow field is given by u = xˆi – yˆj . If r is the density of the fluid, the expression for pressure gradient

Q. A two-dimensional incompressible frictionless flow field is given by u = xˆi – yˆj . If r is the density of the fluid, the expression for pressure gradient vector at any point in the flow field is given as

Ans: – ρ (xi + yj)