Question

The pressure gradient in the direction of flow is equal to the

• A. Shear gradient parallel to the direction of flow
• B. Shear gradient normal to the direction of flow
• C. Velocity gradient parallel to the direction of flow
• D. Velocity gradient normal to the direction of flow

Answer 1

The correct option is B Shear gradient normal to the direction of flow

$\frac{dp}{dx}=\frac{d\tau }{dy}$
This is Navier-Stokes' equation for steady incompressible flow.