Understand Engineering. See The Physics.
Explore interactive experiments, learn the mathematics and discover how mechanical systems really work.
Fluid Mechanics Unit 1 13 lessons 6 interactive simulations
Free to use. Works on phone, tablet and computer.
Start With Fluid Mechanics
13 lessons that answer one question: what exactly is a fluid, and how do engineers study it?
Every Lesson Works Like A Small Experiment
Wonder
Real-world problem, Predict
Start from a real machine or situation and guess what will happen.
Discover
Experiment, Understand, Derive
Run the simulation, then build the equation step by step.
Use
Calculate, Apply, Validate, Quiz
Solve a real numerical, check it against the simulation and test yourself.
Play First, Then Look Inside
Every simulation shows the equations behind it, the assumptions it makes and where it stops being valid.
Shear Test
Slide a plate over water, honey or air, or push a rubber or steel block.
Model: Steady laminar Couette flow, τ = μU/h; linear elastic shear, τ = Gγ
Zoom Into A Fluid
Shrink a sampling box until density starts to flicker.
Model: Expected counts N̄ = nL³ with statistical sampling; Knudsen number
System Or Control Volume
Follow one blob of water, or watch a tank fill and settle.
Model: Mass balance with pump inflow; orifice outflow or household demand; overflow at 2 m
One Subject At A Time
Mechanical engineering is about anything that moves, carries force or uses energy. We are building it one subject at a time.
Energy And Heat
Engines, power plants, fridges and air conditioners move and convert energy.
Thermodynamics, Fluid Mechanics (live), Heat Transfer, Refrigeration And Air Conditioning
Forces And Motion
Why bridges stand, beams bend and gears mesh.
Engineering Mechanics, Strength Of Materials, Theory Of Machines
Making Things
How parts are designed, measured and manufactured.
Machine Design, Manufacturing Processes, Engineering Materials
Everyday Questions, Engineering Answers
Why honey is a fluid but a brick is not
Honey cannot hold a sideways push while at rest, so it keeps flowing.
How a cycle gear makes hills easier
A bigger rear gear gives more turning force at the wheel.
Lesson coming soon
Why a fridge feels warm at the back
It pumps heat from inside to the room.
Lesson coming soon
Why pressure cookers cook faster
Higher pressure raises the boiling point of water.
Lesson coming soon
Why bridges have triangles
A triangle cannot change shape without changing a side length.
Lesson coming soon
Why a car needs a radiator
Coolant carries engine heat to the air.
Lesson coming soon
Engineering Showcase: Gear Train
A preview of Theory Of Machines. Change the teeth and speed and watch speed trade for turning force.
Keep Track Of Your Learning
A free account saves completed lessons, quiz scores, your Experiment Notebook and badges, on every device.