Thermal &
Fluid Science.
See the invisible.
Why does heat move, a fluid flow, or a tank settle at a particular level? Start with what you can see. Discover the relationships underneath.
a question to play with.
Turn up the inlet. Open the outlet.
Will the water rise, fall, or find a balance?
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The level is finding its balance.
The world moves.
Learn to explain how.
Heating a home. Pumping a liquid. Cooling a reactor. Each begins with the same questions: what moves, what drives it, and what changes along the way?
This course connects physical intuition to models you can use to predict behavior—and decide whether an answer makes sense.
Three ways to see a system.
A pressure difference.
A flow response.
A fluid’s motion depends on the forces driving it and the resistance along the way. The tank above connects flow to a changing liquid level.
A little structure.
A world to discover.
Build intuition, connect the equations, and practice predicting what comes next.
Start with the foundations, or revisit a topic when you need it. Each available lesson pairs a physical idea with an interactive example and practice.
Start with why it matters ↗IFoundations of thermodynamics+
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Describe a system and follow its energy.
Why thermal and fluid science?
- Why do thermal and fluid sciences matter? ↗Interactive lesson
- How do we describe a system? ↗Interactive lesson
Systems, properties & state
- What crosses the boundary? ↗Interactive lesson
- What tells us the state? ↗Interactive lesson
- What do pressure and temperature measure? ↗Interactive lesson
Energy, heat, work & the first law
- Where is the energy? ↗Interactive lesson
- How does energy cross a boundary? ↗Interactive lesson
- How do we account for energy? ↗Interactive lesson
IIProperties & energy balances+
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Connect material properties to energy balances.
Pure substances & phase change
- What happens during a phase change? ↗Interactive lesson
- How do we read property tables? ↗Interactive lesson
- What does vapor quality mean? ↗Interactive lesson
Energy in closed systems
- How does a closed system store energy? ↗Interactive lesson
- What does a moving boundary do? ↗Interactive lesson
- How much energy changes the temperature? ↗Interactive lesson
Energy in flowing fluids
- What enters, leaves, and accumulates? ↗Interactive lesson
- Why does flowing fluid carry enthalpy? ↗Interactive lesson
- How do we balance energy in a flowing system? ↗Interactive lesson
IIIFluid mechanics+
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Explain pressure, motion, and resistance.
Fluid properties & pressure
- What makes a fluid a fluid? ↗Interactive lesson
- How does pressure change with depth? ↗Interactive lesson
- How do we describe fluid motion? ↗Interactive lesson
Bernoulli & mechanical energy
- How does mechanical energy move with a fluid? ↗Interactive lesson
- When can we use Bernoulli? ↗Interactive lesson
- How do pumps and losses change the balance? ↗Interactive lesson
Flow through pipes
- How do flow regimes differ? ↗Interactive lesson
- Why does pressure fall along a pipe? ↗Interactive lesson
- How do we model a pipe system? ↗Interactive lesson
IVHeat transfer+
Reading your saved completion.
Predict how temperature differences move energy.
How heat moves
- How does heat move through a solid?Coming soon
- How does moving fluid transfer heat?Coming soon
- How can energy travel without contact?Coming soon
Conduction & convection
- What determines heat flow through a wall?Coming soon
- How do layers share a temperature drop?Coming soon
- How does the surrounding fluid change heat transfer?Coming soon