Connect pipes, pumps and filters. Build a cooling loop or a pressure vessel and see where the fluid goes.
Build the path the fluid follows
Draw hollow pipes, connect apparatus and place pumps to guide liquids and gases. The useful part is the whole route: reservoirs, inlet, outlet and the connections between them.
Development note: Fluid transport, pressure and apparatus coupling are still being refined.
Pressure changes the experiment
Containers, openings and obstructions give pressure a place to act. Leaks and breaches connect a confined sample to its surroundings, while gravity helps shape free-flowing material.
Development note: Pressure and shock behavior are approximate. Do not infer safe real-world pressure-vessel designs.