Topical Overview
He discovered that the buoyant force is equal to the weight of displaced fluid when an object is immersed in the fluid
Who was Archimedes?
In this year, the Wright Brothers successfully flew the first working airplane over Kitty Hawk, NC
When is 1901?
Hydrodynamics studies ____ (compressible or incompressible) fluids
What is incompressible?
This fluid is more likely exhibit laminar flow (between honey and water)
What is honey (because it has a higher viscosity, or resistance to changing shape)?
In approximately this century, humans first discovered air
When is the 8th century BC?
The Navier-Stokes equation looks like this familiar equation
What is F=ma?
Water moving through a pipe (shown below has its greatest velocity at this numerical point.
———Wall———
3
2
1
———Wall———
What is 2 (boundary layer concept)?
This is the weight (in pounds) of air in a room with dimensions of 20m x 14m x 26m (0.08 pounds/ft3)
What is 582.4 pounds?
The Reynold’s number range of transitional flow
What is 2000->3500?
Suppose water is moving through a pipe. If the pressure is increased from 30 kPa to 80 kPa, the water’s velocity will _____ (increase, decrease, or stay the same)
What is decrease (Bernoulli’s principle)?
The kg payload of a hot air balloon that has a weight of 120kg and a carrying capacity of 872m3 (density of air and helium are 1.30 kg/m3 and 0.18 kg/m3, respectively)
What is 857 kg?
The three types of forces described in the RHS of the Navier-Stokes equation
What are pressure, shearing/stress, and body forces?
The layers of a fluid will move faster relative to each other if _____ (500N or 200N) of force is applied parallel to its surface
What is 500N (law of viscosity of Newtonian fluids)?
These are the four fundamental forces of flight
What are lift, thrust, drag, and weight?
These five variables go into Reynold’s number formula
What are average velocity, pipe diameter, viscosity of fluid, fluid mass density, gravitational constant?