General Qs Flashcards
What is the definition of fluid mechanics?
The study of fluids in motion and at rest, including liquids and gases.
True or False: Fluid mechanics deals only with liquids.
False. Fluid mechanics deals with both liquids and gases.
What is viscosity in fluid mechanics?
The measure of a fluid’s resistance to flow.
What is the equation for calculating pressure in a fluid?
Pressure = Force/Area
What is Bernoulli’s equation used for in fluid mechanics?
To describe the behavior of fluid flow along a streamline.
What is the equation for calculating the velocity of fluid flow?
Velocity = Volume Flow Rate/Area
What is the difference between laminar and turbulent flow?
Laminar flow is smooth and orderly, while turbulent flow is chaotic and unpredictable.
What is the continuity equation in fluid mechanics?
The principle that states the mass flow rate into a control volume must equal the mass flow rate out.
What is the Reynolds number used for in fluid mechanics?
To predict whether flow will be laminar or turbulent.
What is the definition of a fluid?
A substance that flows and has no fixed shape.
What is the equation for calculating the hydrostatic pressure in a fluid at rest?
Hydrostatic Pressure = Density x Gravity x Height
True or False: Pascal’s law states that pressure applied to a confined fluid is transmitted undiminished in every direction.
True
What is the definition of dynamic pressure in fluid mechanics?
The pressure associated with the movement of a fluid.
What is the principle of conservation of mass in fluid mechanics?
The principle that states mass cannot be created or destroyed in a fluid system.
What is the definition of a streamline in fluid mechanics?
A line that is tangent to the velocity vector of a fluid flow at any point.
What is the equation for calculating the total pressure in a fluid flow?
Total Pressure = Static Pressure + Dynamic Pressure
What is the definition of a fluid element in fluid mechanics?
A small portion of a fluid that can be analyzed to understand the flow properties.
What is the difference between compressible and incompressible fluids?
Compressible fluids change density with pressure, while incompressible fluids do not.
What is the equation for calculating the buoyant force on an object in a fluid?
Buoyant Force = Weight of Fluid Displaced
True or False: Archimedes’ principle states that the buoyant force on an object is equal to the weight of the object itself.
False
What is the definition of specific weight in fluid mechanics?
The weight per unit volume of a fluid.
What is the equation for calculating the flow rate of a fluid?
Flow Rate = Area x Velocity
What is the definition of a control volume in fluid mechanics?
A region in space through which fluid mass flows.
What is the difference between steady and unsteady flow?
Steady flow has constant properties at any point in the flow field, while unsteady flow does not.
What is the equation for calculating the shear stress in a fluid flow?
Shear Stress = Viscosity x Velocity Gradient
