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Learn Fluid Mechanics: Flashcards, Quizzes, and Key Concepts

This page offers valuable tools to help you understand fluid mechanics, including interactive flashcards, quizzes, and a comprehensive glossary. Use these resources to test your knowledge and deepen your understanding of fluid dynamics.

Practice Questions

Test your knowledge with these practice questions

What is the primary difference between laminar and turbulent flow?

What does Bernoulli's equation primarily relate?

Which of the following is true about Reynolds number?

Which of the following fluids has the highest viscosity?

True or False: A pitot tube is used to measure the velocity of a fluid.

What does the continuity equation in fluid mechanics state?

Which principle explains why an object floats in water?

What is the primary factor that affects the drag force on an object moving through a fluid?

True or False: Incompressible fluids have a constant density regardless of pressure changes.

Key Terms & Definitions

Important concepts to remember

Fluid

A substance that continuously deforms under shear stress, including liquids and gases.

Related Terms:Viscous fluid, Incompressible fluid

Viscosity

A measure of a fluid's resistance to flow or deformation, reflecting internal friction.

Related Terms:Flow resistance, Internal friction

Reynolds Number

A dimensionless number used to predict the type of fluid flow, indicating whether the flow is laminar or turbulent.

Related Terms:Laminar flow, Turbulent flow

Bernoulli’s Equation

An equation that relates the pressure, velocity, and elevation of a flowing fluid, describing energy conservation in fluid dynamics.

Related Terms:Pressure-velocity relationship, Fluid energy

Laminar Flow

A type of fluid flow characterized by smooth, parallel layers with minimal mixing.

Related Terms:Smooth flow, Viscous flow

Turbulent Flow

A chaotic flow regime with irregular fluctuations and eddies, usually occurring at high velocities.

Related Terms:Chaotic flow, Reynolds number

Continuity Equation

An equation that states that the mass flow rate of an incompressible fluid is constant along a streamline.

Related Terms:Conservation of mass, Flow rate

Archimedes' Principle

A principle stating that any object submerged in a fluid experiences a buoyant force equal to the weight of the fluid displaced.

Related Terms:Buoyancy, Displacement

Pressure

The force exerted by a fluid per unit area on a surface. It increases with depth in a fluid.

Related Terms:Fluid pressure, Hydrostatic pressure

Hydraulic Diameter

A measure used for non-circular ducts, calculated as four times the cross-sectional area divided by the wetted perimeter.

Related Terms:Flow measurement, Duct flow

Flow Rate

The volume of fluid passing through a section per unit time, typically measured in cubic meters per second.

Related Terms:Volumetric flow, Fluid velocity

Buoyancy

The upward force exerted by a fluid on an object submerged or floating within it, equal to the weight of the fluid displaced by the object.

Related Terms:Archimedes' principle, Upward force

Pitot Tube

A device used to measure the velocity of a fluid by comparing stagnation pressure and static pressure.

Related Terms:Fluid velocity, Pressure measurement

No-Slip Condition

The assumption that the velocity of a fluid at a solid boundary is zero due to the friction between the fluid and the surface.

Related Terms:Boundary layer, Fluid friction

Cavitation

The formation and collapse of vapor bubbles in a fluid due to local pressure drops, causing potential damage to surfaces.

Related Terms:Bubble formation, Pressure drop

Frequently Asked Questions