Flow Sim

Instructions

Running this simulation depicts two-dimensional fluid flow over various shapes. The black area/shape represents a barrier which the fluid must flow around. The fluid flow is initialized from left to right, and the colors over the lime-green background indicate the curl, or the local rotational motion of the fluid. The solver uses Lattice Boltzmann which considers the fluid as a collection of particles whose motion can be modeled through streaming and collisions.

Play around with the flow and shape controls to see what happens to the flow under different conditions. Enjoy!

Control Descriptions

• Steps: number of solver steps computed per frame.
• Flow Velocity: speed of the fluid.
• Viscosity: the thickness of the fluid due to internal friction.
• Contrast: scalar factor for the color gradient.
• High Resolution: increases the resolution, but decreases simulation speed.
• Tracers: particles used to better visualize the motion of the fluid.
• Angle: angle at which the shape meets the fluid. Measured from the positive x-axis.
• Shape: black area that acts as a barrier to the fluid.