FLUIDS IN MOTION Flashcards
Streamline Flow
Layers Of Liquid Slide Past Eachother Without Disturbance.
Low Friction Between Layers
Turbulent Flow
Liquid Layers Mix
High Friction Between Layers
Why Does Air Flow Over Can Become Turbulent
Creates ‘Drag’ Which Slows Car Down
How Do Cars Spoilers Make Cars More Streamlined
Air Flows Alger Car More Laminar, Less Turbulent Which Reduces Drag
Velocity Of Fluid Flow In Pipe
Velocity Of Fluid Highest In The Middle Of The Pipe
Flow Rate In & Out Of Pipe
Is Consistent
Bernoulli’s Principle - V & P
Sum Of Pressure Energy & Kinetic Energy Is Consistent At Any Point
If Velocity Increases What Happens To The Pressure
Pressure Decreases
What Happens To The Velocity When Pipe Narrows
Increases
Mass Flow Rate Is Consistant Means
Same Amount Of Water Entering Must Leave
Features Of The Wing Shape
Wing Longer On The Top
Wing Shorter At The Bottom
Wing Is Longer At The Top Means
Air Travelling Over Top Of Wing Must Travel Further
What Happens To The Air Pressure On The Top Wing
It Reduces
Wing Shorter At The Bottom Means
Air Travels At The Bottom Of Wing Travels Shorter Distance
What Happens To The Air Pressure At The Bottom Wing
It Increases
Why Does Air Travelling At The Top Of The Wing Travel At Higher Velocity
Reduces Air Pressure At The Top Of Wing
Upward Force On The Wing
Features Of Spoilers
Longer On The Bottom
Shorter On The Top
Why Is The Spoiler Longer At The Bottom
Air Travels Further
Travels At Higher Velocity
Reduces Air Pressure On The Bottom
There’s A Downwards Force On Spoiler
When Is The Viscosity Of Newtonian Fluid Constant
When Temperature Stays The Same
What Effects The Viscosity Of Newtonian Fluid
Changing The Temperature
Why Does Honey Flow More Easily When Heated
Particles Have More Energy
Forces Between Particles Are Weaker
As Temperature Of Newtonian Liquid Increases, Viscosity Decreases Because
Liquid Density Decreases
Particles In Liquid Have More Energy
Particles Have Less Forces Between Them
They Can Flow More Easily
Flow Velocity Increases
As Temperature Of Newtonian Gas Increases, Viscosity Increases Because
Particles Have More Energy
Particles Move Faster
Particles Collide More Often
Particles Move Less Energy
Increases Gases Resistance To Movement
Shear Thickness Fluids
Viscosity Increases When Shear Force Is Applied (e.g, shaken, stirred)
Particles Resist Movement
Shear Thinning Fluids
Viscosity Decreases When Shear Force Is Applied
Layers Of Particles Slide Over Eachother More Easily
Features Of Turbulent Water Flow
Increases Friction (Increases Drag)
Streamline Mix
Chaotic Flow
Speed Of Water Consistently Changing
Effect Of Water Pressure When Pipe Narrows
Velocity Increases
The Pressure Decreases
Factor That Affects The Pressure Of Oil In The Pipe
Diameter Of The Pipe
Why Wedge Shape On The Car Allows It To Move Fast
Streamline Design
reduces Turbulence
less Air Action
Bernoulli’s Principle, Why Two Balloons Move Towards Eachother
Air Flow Faster Between The Balloons
Faster Air Flow Reduces Air Pressure Between Balloons In Pressure Difference
Describe How Shaking Glass Bottle Makes Ketchup Flow Quicker
Viscosity Decreases When Shear Pressure Is Applied As Ketchup Particles Slide Past Eachother
Explain Why Oobleck Acts Like A Solid When Jumped On
Viscosity Increases When Set
When Force Applied It Becomes Ridged & Resists Movement.
Effects Of Low Temp On How Oil Acts As A Lubricant
When Cold, Oil Will Not Flow Through Engine Easily
As Oil Is Thicker
Oil Won’t Reach All Parts In The Engine
Effects Of High Temperature Of Oil Acting As A Lubricant
The Oil Will Not Coat Moving Parts
Oil Thin Making Engine Wear Greater
Oil Will Flow Faster/ Quicker
Laminar streamlined flow
Layers liq slide past eachother without disturbance
Low friction b/w layers
Turbulence follow
Liq layers mix
High friction b/w Layers
Air on the top wing
High Velocity
What force is put on wing
Upward force on wing
The distance air has to travel over spoiler shape
Shorter distance
2 features of Turbulence water flow
⬆️ friction
Streamline cross eachother
Chaotic flow
Speed water constantly changing
Describe How Shaking Glass Bottle Makes Ketchup Flow Quickly (3)
Viscosity ⬇️ when shear force applied
Layers particles slide over eachother easily
Velocity of oil change due to change in viscosity when temp rises (3)
Oil has lower viscosity
Particles have more energy
Less force b/w particles
Bonds broken
Oil flows faster
Explain why oobleck acts like a solid when jumped on (3)
Becomes thicker
Shear force applied
Resists movement
Explain affects of low temp & how oil acts as lubricant (2)
Oil thicker
Wont move to all parts of engine
Effects of high temp how oil acts as lubricant (2)
Higher temp oil not coat all moving parts as thinner
Thin oil make engine wear grated
