Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For K-12 Students · Cooling Fan Selection

Cooling Fan Selection for a transmission line

Built for k-12 students learning it in middle or high school. Watch the idea come alive with plain-language steps and everyday examples — perfect for projects and homework. Simulate a transmission line live below — adjust the inputs and watch it respond, right in your browser.

Fluid

open full solver →

2D Fluid (CFD) StudioLive

Stam stable-fluids · Navier–Stokes

Controls

Speed1×

Click and drag on the canvas to inject dye and velocity.

Presets

Viscosity

Injection force

Dye amount

▶ Run in Python

Data Inspector

Grid96×96

Total dye0

Mean speed0.000

Max speed0.000

Enstrophy0.00e+0

Governing equation

\frac{\partial u}{\partial t} + (u \cdot \nabla) u = - \frac{\nabla p}{ρ} + 1.0 e - 7 \nabla^{2} u, \nabla \cdot u = 0

Reading this result: Near-zero viscosity: momentum barely dissipates, so vortices persist and the flow tips into turbulent, chaotic mixing.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

↓

Sound Levels

open full solver →

Sound Levels (dB SPL)Live

adding & spreading loudness

Controls

Presets

Level per source at 1 m (dB)

Number of sources

Distance (m)

Decibels are logarithmic, so loudness does not add the way you expect: two identical sources are only 3 dB louder than one, and ten are 10 dB. Meanwhile a point source drops 6 dB every time the distance doubles (the inverse-square law). Sustained exposure above 85 dB risks hearing damage.

▶ Run in Python

Data Inspector

Combined at 1 m85.0 dB

At 4 m73.0 dB

Doubling sources+3 dB

Risksafe range

Governing equation

L = 85.0 - 20 lo g_{10} (4) = 73.0 dB

Reading this result: A single source falls from 85 dB to 73 dB across 4 m — about 6 dB lost each time the distance doubles.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

or unlock everything with Pro →

Also for:Students Researchers Educators Engineers Hobbyists & Makers First Responders General version →

More with Cooling Fan Selection

Cooling Fan Selection for a solar farm Cooling Fan Selection for a wind turbine Cooling Fan Selection for a home battery Cooling Fan Selection for an EV charger Cooling Fan Selection for a power grid Cooling Fan Selection for a heat pump Cooling Fan Selection for a gas turbine Cooling Fan Selection for a hydro dam

Frequently asked questions

Is this good for k-12 students?: Yes — this version of "Cooling Fan Selection for a transmission line" is framed for k-12 students learning it in middle or high school. Watch the idea come alive with plain-language steps and everyday examples — perfect for projects and homework.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.