Each sweep re-runs the model analytically for 40 values of one parameter while the others keep the current slider settings, and compares it with the closed form where one exists.
Missions use the live model. Change the three sliders and the style, then press Erupt.
Seven independent checks against closed-form or textbook values. Run them again at any time.
This simulation draws a 3D volcano with WebGL. Please open it in a recent desktop or mobile browser.