4. Show that the velocity field V = 2y(2x + 1)î + [x(x+1) – 2y²1j represents a possible incompressible flow and determine the stream function p(x, y) that will yield the given velocity field.

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Properties of Fluids

The term fluid represents a type of substance that can easily change its shape under any external pressure/force and can flow. Fluids can acquire any shape in which it is stored and can resist normal stresses but cannot resist shear stress in rest condition. Whenever external shear stress is applied to fluids, it starts to flow. The fluids may be liquid or gas. Example- water, air, etc.