There Are Both Natural And Constructed Fluid Systems

There are both natural and constructed fluid systems

Buoyant Force Buoyancy Convection One Atmosphere

Fluids under pressure have many uses in industry and daily life. Fluids naturally move from an area of high pressure to an area of low pressure The movement of fluids from an area of high pressure to an area of low pressureoccurs in natural systems as well as in constructed systems

Did you know some dentists use airabrasion to drill a tooth Compressed air blows particles ofaluminum oxide powder at high speed toremove the areas of decayed tooth. In natural systems – our brain issurrounded by fluid, this fluid cushionsthe brain and delivers nutrients to thebrain Hydrocephalus is a condition that canoccur in babies where there is too muchpressure in the skull forcing pressure onthe brain. This could result in budging skulls, seizures,and even brain damage.

Earth’s atmosphere extendsmore than 160km above Earth. Every layer exerts pressure onthe layer below because of thegravitational force on theparticles. Air pressure changes withaltitude As you go higher in elevation,the air is less dense becausethe air is less compressed.

So then why do your ear’s ‘pop’ when you drive down from a higher elevation, likeblack mountain or big white? This is because the pressure in the air is greater, causing the thin membrane ofyour eardrum to allow air into you ear and the pressure equalizes!

Fluids move from an area of highpressure to low pressure. Think of drinking a juice box,why does the juice boxcontainer collapse? As you draw juice up the strawthe air pressure on the outside ofthe container pushes thecontainer in. This means the pressure insidethe container is less than theoutside, we call this anunbalanced force

We can use this concept of high pressure moving to a low pressure in a number ofmechanical devices to carry, push, or move objects. We can them pneumatic tools Can you think of any? Examples: Air impact wrench, airbrush, jackhammer, air hammer, sand blaster,paint sprayer, air saw

If you are underwater, you can feel the pressure of the water all around you. The deeper you go into the water, the more water will be pressing down upon you Think of a submarine The pressure of each square metre of a submarine at a depth of 500m is equivalent to theweight of 40 elephants

The atmospheric pressure at sea level is101.4kPa, also called one atmosphere ( 1atm) For every 10m you descend into water, thepressure increases by 1 atmosphere Humans diving can only dive 40m or 130ftbefore feeling the immense pressure of thewater above them A record was set in 2012 by James Cameron,movie director, who took his Challenger –Deep to Mariana’s trench to the depth of 10,908m or 35,787ft

See the Dive

Buoyancy is the tendency of objects in fluid to rise of sink because densitydifferences with their surroundings A buoyant force is the upward force exerted by a fluid Hot air balloons Transport of nutrients in our blood Pollen floating in the air Boats Planes

Submarines are specially designed because they will take on water and removewater from the vessel Compressed air is used to pump and push water out of the submarine to cause it torise or take in water to dive

Fluids under pressure have many uses in industry and daily life. Fluids naturally move from an area of high pressure to an area of low pressure The movement of fluids from an area of high pressure to an area of low pressure occurs in natural systems as well as in constructed systems Did you know some dentists use air