Pflow3 is a free educational application developed by Dr. Weymouth for Android devices. It provides an interactive visualization of fluid flow, allowing students to create and change the flow by dragging and dropping basic building blocks such as sources, vortices, and doublets. The flow can be visualized by animated flow tracers, making it an excellent tool for students learning about flows from college to graduate level.

The major optimization update to Pflow2 makes Pflow3 run much faster and more responsively, especially on older phones. Developed using Processing for Android, Pflow3 is a must-have app for students of fluid mechanics and related fields.