Fluid Dynamics

PHYSICSStudio

A real-time 2D fluid simulator with click-and-drag dye injection and tunable viscosity, diffusion, and fade.

UpdatedJan 2025

ExportsPNG

Runs onAny browser

PriceFree

Overview

A dynamic physics playground.

Fluid Dynamics is a real-time fluid simulator running on a grid in your browser. It moves a velocity field, carries a dye density through it, and renders the result as a flowing visual.

Click and drag to inject dye and push the fluid. Viscosity controls how thick the flow is, diffusion controls how fast dye spreads, and fade controls how quickly the field decays back to zero.

Features

Built for physics-scale experimentation.

01 / Spotlight

Real-time fluid solver

On a grid; renders at full window size.

Tunable viscosity (thickness)

Diffusion (dye spread), and fade (decay rate).

Click-and-drag adds dye

And applies velocity; the field evolves in real time.

How to use

Workflow

Steps take about a minute.

Click and drag inside the view to inject dye and push the fluid. Adjust viscosity, diffusion, and fade in the sidebar to change how the flow behaves. Export PNG from the toolbar.

Use cases

What people use it for

Visualizing fluid dynamics for physics teaching or demosCreating smoke-like and dye-injection visual effectsExploring fluid behavior interactively with tunable parametersGenerating abstract fluid art for export

FAQ

Common questions

How does performance scale?+

The solver runs on a moderate grid, so it stays smooth on most devices. It's designed as an interactive visualization tool rather than a high-resolution fluid simulation.

Why does the fluid settle?+

The fade slider pulls both velocity and density back toward zero each step. Lower fade values mean the field persists longer; high fade means the fluid settles within a second or two.