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Bubbles (2D)

A 2D bubble-physics sandbox: real Archimedes buoyancy with fluid added-mass inertia, quadratic drag giving a size-dependent rise speed, elastic collisions and size-threshold coalescence that conserves area.

Physics & Mechanics2DModerate60 FPS📱 Mobile-adapted💧 Water 💨 Air & Wind ⇄ 3D version

Details

CategoryPhysics & Mechanics

RenderingCanvas 2D

DifficultyModerate

Target FPS60

ControlsFive sliders control fluid density, drag coefficient, gravity, collision restitution and coalescence rate; a spawn-burst button injects 8 bubbles, a stream toggle continuously emits bubbles from the bottom, a clear button removes all bubbles, and clicking the fluid injects a bubble at the cursor.

buoyancyfluid dynamicscollision physicscoalescencesurface tension2d

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This 2D companion to the 3D Bubble World strips soap-film decoration away and focuses purely on the mechanics of a bubble rising through a fluid: Archimedes buoyancy competing with weight and fluid added-mass inertia, quadratic drag that yields a genuine size-dependent terminal rise speed, elastic/inelastic collisions resolved as real momentum-conserving impulses, and coalescence driven by a Laplace-pressure-inspired film-drainage model that favors small bubbles merging quickly while letting large ones bounce apart. Tune fluid density, drag, gravity, restitution and coalescence rate to see how each one reshapes the bubble population over time.

⚙ Under the hood

A 2D bubble-physics sandbox: real Archimedes buoyancy with fluid added-mass inertia, quadratic drag giving a genuine size-dependent rise speed, elastic/inelastic collisions resolved as momentum-conserving impulses, and coalescence driven by a Laplace-pressure film-drainage model that conserves area.

buoyancyfluid dynamicscollision physicscoalescencesurface tension2d

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install