PIRA 200
Fluid Mechanics



FLUID MECHANICS

2A10.20

SURFACE TENSION

Force of Surface Tension

Floating Metals

 

Place the needle on a bit of tissue and place on the surface of fresh water. Sink the tissue with a stick, leaving the needle floating. Add a little soap to sink the needle.

Workshop Video



FLUID MECHANICS

2B20.40

STATICS OF FLUIDS

Static Pressure

Pascal's Vases

Disc 12-01

Water levels in different shaped containers attached to a common reservoir will reach the same height no matter what the shape of the container.

Workshop Video



FLUID MECHANICS

2B30.10

STATICS OF FLUIDS

Atmospheric Pressure

Crush the Can

Disc 12-01

Pour an inch of water into the can. Set it on a stand and start the gas burner. Let it boil for a while to displace all the air. Use insulated gloves to tighten the cap onto the can and at the same time, turn off the heat. Spray it with water to cool it faster. If the cap is tight, and as the steam inside cools and contracts, the can will collapse from atmospheric pressure.

Workshop Video



FLUID MECHANICS

2B30.30

STATICS OF FLUIDS

Atmospheric Pressure

Magdeburg Hemispheres

Disc 11-12

Make sure the valve is open. Turn on the vacuum pump to evacuate the hemispheres. Shut the valve and remove the hose. Have two students try to pull the hemispheres apart. You may also use your lungs to create a partial vacuum or a hand pump.

Workshop Video



FLUID MECHANICS

2B35.30

STATICS OF FLUIDS

Measuring Pressure

Manometers

 

Simple water and mercury manometers.

 



FLUID MECHANICS

2B40.10

STATICS OF FLUIDS

Density and Buoyancy

Weigh Submerged Block

Disc 12-11

Weigh the block in air, then submerged in water. The difference is the buoyant force.

Workshop Video



FLUID MECHANICS

2B40.20

STATICS OF FLUIDS

Density and Buoyancy

Archimedes' Principle

Disc 12-12

A cylindrical mass and bucket are suspended from a spring scale above a beaker with an overflow spout. Note the scale reading. Submerge the mass by raising the beaker with the lab jack. Pour the water from the catch bucket into the hanging bucket to return to the original scale reading. You may also show that the mass exactly fits inside the hanging bucket.

Workshop Video



FLUID MECHANICS

2C10.10

DYNAMICS OF FLUIDS

Flow Rate

Torricelli’s Tank

 

Water streams from holes at different heights in a vertical acrylic tube.

 

Workshop Video



FLUID MECHANICS

2C20.15

DYNAMICS OF FLUIDS

Bernoulli Force

Bernoulli / Venturi Tubes

 

 

Air flows through a restricted tube. Manometers show the pressure differences.

 

Workshop Video