Question

For a laminar flow of fluid, identify the correct statement regarding the magnitude and direction of the velocity at a given point in the fluid.

• A. Both magnitude and direction of velocity are constant
• B. Only magnitude is constant
• C. Only direction of velocity is constant
• D. Both are not constant

Answer 1

The correct option is A Both magnitude and direction of velocity are constant

In fluid dynamics, laminar flow is characterized by fluid particles following smooth paths.

In a laminar flow, the streamlines are uniformly spaced, with no stream lines crossing each other at a given time.
The tangent drawn at a point on a streamline will represent the velocity $\left(\overrightarrow{v}\right)$ of fluid particle. Hence, the magnitude and direction of fluid velocity will be constant at a given point on a streamline of fluid flow.