**Q. Consider the flow of fluid in a boundary layer. Take a control volume which has a shape of a parallelopiped with dimensions (dx x dy x 1) **

u = velocity of the fluid entering the control volume

v = velocity of the fluid leaving the control volume

Considering above condition, the equation

(∂u / ∂x) + (∂v / ∂y) = 0

is known as *- Published on 12 Aug 15***a.** continuity equation for incompressible, steady, two dimensional flow

**b.** continuity equation for compressible, steady, two dimensional flow

**c.** continuity equation for incompressible, unsteady, two dimensional flow

**d.** continuity equation for incompressible, steady, three dimensional flow

**ANSWER: continuity equation for incompressible, steady, two dimensional flow**