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WebGL Fluid Simulation - Online Interactive Ink Drop

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🖱️ Click & drag to add colorful ink • Touch & swipe on mobile

🎨 WebGL Fluid Simulation — Interactive Ink Drop

Experience real-time fluid dynamics rendered entirely in your browser using WebGL. Click, drag, and watch colorful ink swirl and diffuse like liquid in water.

WebGL Powered Real-time Physics No Downloads Mobile Friendly Open Source
What is WebGL Fluid Simulation?

WebGL Fluid Simulation is a browser-based implementation of fluid dynamics that uses your GPU (Graphics Processing Unit) to simulate the behavior of liquids in real time. It solves the Navier-Stokes equations — the mathematical formulas that describe how fluids move — directly in your browser using shader programs. The result is a beautiful, interactive visualization where colorful "ink" disperses, swirls, and flows naturally as you interact with it.

How does the fluid simulation work?

The simulation processes several steps per frame: Advection moves the dye and velocity fields along the flow; Diffusion spreads the ink and velocity naturally; Pressure solving ensures the fluid remains incompressible (like real water); and Vorticity confinement preserves fine swirling details. All these calculations run as WebGL fragment shaders on your GPU, enabling smooth 60fps performance even with complex fluid patterns.

Can I use this on mobile devices?

Yes! This tool is fully optimized for mobile and tablet devices. The simulation automatically adjusts its internal resolution based on your device's capabilities. Touch interactions are supported — simply swipe and tap on the screen to add ink and create fluid motion. The control panel is responsive and adapts to smaller screens for comfortable one-handed use.

What are the different color modes?

You can choose from five color presets: Rainbow (full spectrum colors that shift based on velocity direction), Ocean Blue (calming blue-teal gradients reminiscent of tropical waters), Fire (warm oranges and reds like flames), Aurora (vibrant greens, cyans, and purples inspired by the Northern Lights), and White Ink (classic monochrome for a clean, elegant look). Each mode creates a distinctly different visual experience.

Is this based on real physics?

Yes. The underlying math is based on the incompressible Navier-Stokes equations, which are the fundamental equations governing fluid motion. The simulation uses a grid-based Eulerian approach with semi-Lagrangian advection and Jacobi iteration for pressure solving — techniques widely used in computational fluid dynamics (CFD). While simplified for real-time performance, the core physics accurately models how real fluids behave.

How can I save or share my creation?

Use the camera button (📸) in the control panel to capture a high-resolution screenshot of your current canvas. The image will be downloaded directly to your device as a PNG file. You can share it on social media, use it as wallpaper, or incorporate it into digital art projects. For the best results, let the simulation run for a while to build up complex, beautiful patterns before capturing.

What are the practical applications of fluid simulation?

Beyond being visually mesmerizing, fluid simulations are used in video game development (realistic water and smoke effects), film VFX (ocean waves, explosions), engineering (aerodynamics testing, weather modeling), medical imaging (blood flow analysis), and digital art. This browser-based tool demonstrates how accessible GPU computing has become — complex physics that once required supercomputers now runs in real time on consumer devices.

What browsers support WebGL Fluid Simulation?

All modern browsers support WebGL, including Chrome (version 9+), Firefox (version 4+), Safari (version 8+), Edge (version 12+), and Opera (version 12+). For the best experience, we recommend using an up-to-date version of Chrome or Firefox with hardware acceleration enabled. The simulation will automatically fall back gracefully on older hardware, though frame rates may vary.

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