Fluid Mechanics Fundamentals Quiz

A substance that continuously deforms when subjected to a stress.

The study of forces on fluids at rest (statics) or in motion (dynamics).

A tool to convert system analysis (entire system) to control volume analysis (specific region).

A specific region of interest in fluid flow used for analysis.

The rate at which mass flows through a given area.

The rate at which volume flows through a given area.

Mass cannot be created or destroyed in a closed system.

The total distance travelled by fluid divided by the total time.

The mass of a substance flowing per unit time.

Mass flow rate entering a system.

Mass flow rate leaving a system.

Difference in the mass of a tank at a given time

Determine the final mass in the tank given initial mass, inlet and outlet flow rates, and time duration.

Initial mass in a tank.

Final mass in a tank.

Change in time.

kilograms per second (kg/s)

A specific region in space chosen for analysis, used to apply conservation laws to fluid flow.

A method to convert system analysis using conservation laws to control volume analysis of fluid flow.

Mass can neither be created nor destroyed in a control volume.

Flow properties (density, velocity, etc.) at a point in the control volume do not change with time.

Equation that describes the effect of forces on the linear momentum of a fluid within a control volume.

Mass per unit volume of a fluid.

Speed and direction of fluid flow.

Cross-sectional area through which the fluid flows.

Force exerted by fluid pressure on a surface.

Forces that arise from momentum changes exerted on a control volume.

For incompressible fluids within a changing control volume, the density remains constant, and the change in mass within the volume is equal to the net mass flow in or out.

For compressible fluids in a fixed control volume, mass flow in minus mass flow out equals the change of mass in the control volume.

For compressible fluids in a changing control volume, the mass flow is related to the density, velocity and change of volume.

In a fixed control volume with an incompressible fluid, mass flow into the control volume is equal to mass flow out of the control volume.

In steady flow, the mass flow rate in is equal to the mass flow rate out.

Mass cannot be created or destroyed; the total mass within a system remains constant.

The rate at which volume flows through a given area.

Rate at which mass flows through a surface.

The equation that describes the rate of change of linear momentum within a control volume. It accounts for forces acting on the CV and momentum flow into/out of the CV.

A designated volume chosen for analysis in fluid mechanics. It is the 3D region within which fluid flow is studied.

External forces acting on the control volume (CV) boundaries. These forces are interactions with the environment surrounding the chosen CV.

Force due to pressure acting on a surface, Positive if directed into the CV.

Force exerted by gravity on the fluid within the control volume. It acts downward vertically.

A measure of the rotational motion of a body. For a particle defined as the vector product of its position relative to a reference point with its linear momentum .

A measure of the tendency of a force to cause rotation about an axis.

Rate at which energy is transferred by a fluid

In steady flow, the mass entering a system equals the mass leaving the system.

The accumulation of mass within a control volume equals the difference between the rate of mass entering and leaving.

A specified region of interest to study fluid flow or analyze a process. It's a specific part of the system.

The rate at which mass passes through a given area.

A flow where the properties (density, velocity, pressure) at any point in the system do not change with time.

A flow where the density of the fluid is not constant.

A flow where the density of the fluid is constant.

Describes the forces acting on a fluid particle causing its motion.

Mathematical equations describing the motion of viscous fluids.

The flow between two parallel plates, one stationary, the other moving.

The rate at which volume passes through an area.

Average velocity of the fluid over a cross-sectional area.

Highest speed of the fluid at a particular point in the channel.