01
Streamlines
Particles trace the flow around a cylinder
FLUID DYNAMICS SIMULATOR
See the
See the
flow.
From streamlines and Bernoulli to vortices, lift, buoyancy and Torricelli's law — 12 fluid dynamics simulations you can touch and explore.
Free12 simulations16 languagesiPhone · iPad · Android
12simulations
16languages
$0no in-app purchases
Offlineworks offline
Simulations
12 simulations
Three categories, from flow basics to vortices and lift to water and gravity. Drag and slide to see results change instantly.
Flow basics
02
Bernoulli
A narrower pipe means faster flow and lower pressure
03
Reynolds Number
Speed and viscosity turn laminar flow turbulent
04
Boundary Layer
Flow slows near the plate and the layer thickens
05
Darcy's Law
Groundwater creeping through the gaps in sand
Vortices & lift
06
Vortex
Tap to place vortices and watch them swirl each other
07
Kármán Vortex Street
Vortices line up alternately behind a cylinder
08
Lift Force
Angle of attack and camber change the lift on a wing
09
Magnus Effect
A spinning cylinder feels a sideways force
Water & gravity
10
BuoyancyNEW
Density decides: float, sink, or hang in balance
11
Torricelli's LawNEW
The depth of the hole sets how fast water jets out
12
Surface Wave
Depth sets the wave speed and the orbits of water particles
Screenshots
Touch, observe, understand
Drag on the canvas or move a slider and the flow responds in real time.
Features
Built for learning
Hands-on
Drag obstacles and holes, tap to add vortices, and change parameters with sliders.
Explanations with formulas
Every screen has a hint on how to try it, plus the physics and formulas behind it.
Accessible
Large text, landscape, tablets and screen readers. Touch actions also work through buttons.
16 languages
English, Japanese, Chinese, Korean, Spanish, Portuguese, German, French and more.
Pricing & ads
The app is free. There are no in-app purchases, subscriptions or paid unlocks.
A Pangle banner ad is shown at the bottom of the screen. On iOS, the App Tracking Transparency (ATT) prompt appears at launch, and ads are personalized only if you allow tracking. On Android, the app asks once whether ads may be personalized. Either choice can be changed later from "About this app" > "Ad settings".