Fluid Mechanics

Exam #$3$

$12/23/2024$

Please decide the following statements are true or false. $((10$pts$))$

If the flow is steady, it implies the particle's acceleration is zero.

When Reynolds number is small enough, we don't need to consider the viscous force.

Major loss is always the dominant loss, that is$,$ major loss will always be greater than minor loss.

There is not a unique set of pi terms which arises from a dimensional analysis. However, the required number of pi terms is fixed.

A stagnation point is where the particle acceleration equals to zero.

Pitot tube is used to measure the flow pressure.

If the flow is steady, the streamlines are fixed lines in space that coincides with the path lines.

A control volume always consists of the same fluid particles.

Lagrangian view is to track a fluid particle or a system.

If the flow speed remains unchanged, so the momentum flux remains unchanged.

sloved it for fluid mechanic